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Remo Ruffini (ICRANet, ICRA, INAF)13/07/2026, 09:00
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Roland Walter13/07/2026, 09:35
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Prof. Rashid Sunyaev (Space Research Institute (IKI) of the Russian Academy of Sciences, Max Planck Institute for Astrophysics and Institute for Advanced Study, Princeton)13/07/2026, 10:10Invited talk
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Elia Stefano Battistelli (Spaienza University of Rome)13/07/2026, 11:15Invited talk
Since its conception in the early 2000s, the Atacama Cosmology Telescope (ACT) has played a leading role in transforming the Cosmic Microwave Background into a precision probe of fundamental physics and structure formation. From the first observations in 2007 through the successive ACTPol and Advanced ACTPol upgrades, ACT has pioneered a wide range of measurements, including the first...
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Jens Chluba (JBCA)13/07/2026, 11:50Invited talk
Spectral distortions of the Cosmic Microwave Background (CMB) are one of the next frontiers in CMB cosmology. In my talk I will give a broad brush overview of some of the exciting developments, highlighting what information might be extracted by studying CMB spectral distortions and how we can learn about inflation and particle physics using this new probe.
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Patricio Gallardo (University of Pennsylvania)13/07/2026, 12:25Invited talk
The inverse-square law of gravitation has been tested from microscopic to solar system scales. However, directly probing gravity at galactic and cosmological scales remains a challenge. At galactic scales, the missing mass dominates rotation curves, while extragalactic tests often depend on the assumed expansion history of the universe. These dependencies complicate model-agnostic tests of...
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Angela Bongiorno (INAF-Observatory of Rome)13/07/2026, 13:00Invited talk
The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will open a new window on the dynamic Universe, delivering deep, multi-band, time-domain observations over a large fraction of the sky. Its combination of depth, area, cadence, and wavelength coverage will have a major impact on many areas of astrophysics, from Solar System studies to cosmology and galaxy evolution.
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I will... -
Jaan Einasto (Prof.)13/07/2026, 15:00Invited talk
I provide a review of the fractal properties of the cosmic web. Extreme views on fractal properties were expressed by Pietronero and Davis. To get an unbiased view on fractal properties I describe fractal function found from angular 2D and spatial 3D distributions of galaxies, using numerical simulations and SDSS samples of galaxies in a box of side length 512 Mpc/h. To measure the fractal...
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Federico Lelli (INAF - Arcetri Astrophysical Observatory)13/07/2026, 15:35Invited talk
Milgromian dynamics (or Modified Newtonian Dynamics, MOND) is a major alternative to particle dark matter proposed in 1983 by Mordehai Milgrom. MOND modifies the non-relativistic laws of gravity and/or inertia at low accelerations, below a characteristic acceleration scale a0. In this invited talk, I will showcase the content of the first "MOND white paper" which results from the collaboration...
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Yu Wang (ICRA/ICRANet/INAF)13/07/2026, 16:10Invited talk
Both the Galactic Center and little red dots (LRDs) host million-solar-mass black holes within dense, cold reservoirs of molecules associated with dust grains, and are electromagnetically tranquil. These conditions enable complex molecular chemistry and may serve as natural laboratories for prebiotic genetic evolution by allowing the synthesis of organic molecules essential for life.
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Manasse Mbonye (University of Rwanda)13/07/2026, 16:45Invited talk
We discuss a perturbative and thermodynamic extension of Kalpa-Self-Regulating Cosmology (Kalpa SRC), in which cosmic evolution is governed by self-regulating departures around a preferred equilibrium state characterized by an euation of state $w = -1/3$. Different from conventional cyclic or rebouncing cosmologies, Kalpa-SRC describes a globally, monotonically expanding universe evolving...
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Andrew KOSHELKIN (In person, Moscow, Russia)13/07/2026, 17:00Oral presentation
The influence of the plane gravitational wave on the CMB spectral distribution is studied. In the context of the kinematic SZ effect the distribution maximum is found to be shifted to the soft spectrum range due to the changes of the space-time metrics. The contribution of soft photons generated by charged particle in the field of a gravitational wave into the CMB is derived (the thermal...
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Prof. She-Sheng Xue (ICRANet, Physics Department, Sapienza University of Rome)13/07/2026, 17:15Oral presentation
Wheeler's spacetime foams (wormholes) at the Planck length undergo quantum nucleation, oscillation and annihilation. Their collective excitations over foamy spacetime interact with field operators at large distances. We describe such collective excitation and interaction using an effective ``foamon'' field coupled with field operators. The Wilson renormalisation group approach shows that the...
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GeonWoo Kang (Seoul National University)13/07/2026, 17:30Oral presentation
We present a powerful new diagnostics by which the running of scalar spectral index of primordial density fluctuations can be tightly and independently constrained. This new diagnostics utilizes coherent rotation of void galaxies, which can be observed as redshift asymmetry in opposite sides dichotomized by the projected spin axes of hosting voids. Comparing the numerical results from the...
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Dr Natascha Riahi (University of Vienna)13/07/2026, 17:45Oral presentation
Providing a natural time, unimodular quantum cosmology admits the description of quantum dynamics by a Schrödinger like equation for the wavefunction of the universe. The interplay of growing uncertainties and deviations from classical orbits yields late-time correction terms for the Hubble parameter and the matter density. These quantum correction terms are induced by quantum uncertainties...
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Bing Zhang (University of Hong Kong)14/07/2026, 09:00
I review the recent progress in studying gamma-ray bursts (GRBs), fast X-ray transients (FXTs), and fast radio bursts (FRBs) within the context of multi-wavelength (MW) and multi-messenger (MM) transient astrophysics. Special attention is paid to the breakthrough observations made with the Einstein Probe, SVOM space telescopes, and the FAST radio telescope. Current understanding and open...
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Prof. DI LI (Department of Astronomy, Tsinghua University)14/07/2026, 09:35
Modern physics and astronomy both originated from Galileo. Hertz invented the first antenna and demonstrated the wave-particle duality of light. These developments give rise to radio astronomy and giant dishes. The Parkes multi-beam system transformed single-dish radio astronomy, delivering the largest haul of new pulsars, definitive HI galaxy catalogues, and the standard HI maps of the...
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Prof. Marat Gilfanov (MPA, Garching & IKI, Moscow)14/07/2026, 10:10
After more than two years of scanning the sky during 2019--2022 the eROSITA X-ray telescope aboard SRG orbital observatory produced the best ever X-ray maps of the sky and discovered more than three million X-ray sources, of which about 20\% are stars with active coronas in the Milky Way, and most of the rest are galaxies with active nuclei, quasars and clusters of galaxies. eROSITA detected...
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Marta Burgay (INAF - Osservatorio Astronomico di Cagliari)14/07/2026, 11:15
Pulsars are extremely stable natural clocks and, when found in relativistic binary systems, they can be used as exceptional laboratories to test Relativistic gravity in the strong field regime. In this talk I will present the results obtained in this context by studying the now 20-year-long dataset on the double pulsar system J0737-3039A/B, the only binary hosting two active radio pulsars, and...
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Vadzim Krautsou (University of Turku)14/07/2026, 11:50
The Imaging X-ray Polarimetry Explorer (IXPE) has provided the first precise polarization measurements of black hole X-ray binaries, opening a new window on accretion and high-energy emission physics. In my talk, I will review recent IXPE results across different spectral states and discuss models used to interpret the observed polarization signatures. I will focus on what polarization reveals...
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Prof. Vladimir Lipunov (Lomonosov Moscow State University, SAI, Physics Department)14/07/2026, 12:25
Observation of this burst, which, based on its brightness, could have been detected by the Galileo telescope diameter, began 200 seconds before the burst itself. That is, before receiving alerts from the gamma-ray observatories. This means that the MASTER network is not only mobile but also has record-breaking combined field-of-view parameters (~4000 square degrees). This sheds new light on...
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Felix Mirabel (Instituto de Astronomia y Fisica Espacial. Universidad de Buenos Aires)14/07/2026, 15:00Invited talk
The radio emission from Microquasars (MQs), Little Red Dots (LRDs) and Active Galactic Nuclei (AGN) is crucial to gain insight into the mass accretion, relativistic jets and feedback of black holes (BHs) in these astronomical objects. Based on archived radio monitoring data and the VLASS and FIRST sky surveys of the National Radio Observatory (NRAO), were obtain the following achievements: (1)...
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Giorgio Matt (Roma Tre University)14/07/2026, 15:35Invited talk
The launch of the Imaging X-ray Polarimetry Explorer (IXPE) on December 2021 (re)opened the window of X-ray polarimetry. In its first 4.5 years of operation IXPE observed objects belonging to almost all classes of X-ray sources, with a wealth of interesting and often surprising results. In this talk I will provide a (inevitably biased) review of IXPE results, and briefly discuss possible...
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Gennady Bisnovatyi-Kogan (Space Research Institute Rus. Acad. Sci., Moscow, Russia)14/07/2026, 16:45Oral presentation
Models of neutron and strange stars are studied within the approximation of a uniform density distribution. A universal algebraic equation, valid for any equation of state, is used to estimate the stellar mass at a given density without resorting to the numerical integration of differential equations. Different equations of state for neutron stars had been used.
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Homogeneous strange star... -
Zenia Zuraiq (Indian Institute of Science, Bangalore)14/07/2026, 17:15Oral presentation
Neutron stars, at their cores, are highly dense and, thus, are expected to have a number of exotic processes. This includes a possible phase transition to deconfined quark matter at the core, leading to a hybrid star. The quark matter is expected to additionally be color superconducting. The physics of superconductivity plays an important role in understanding the high density matter in the...
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Prof. Nigel Bishop (Rhodes University)14/07/2026, 17:30Oral presentation
The interaction of gravitational waves (GWs) passing through matter is normally treated as being very weak. We have re-investigated this issue using linearized perturbations within the Bondi-Sachs formalism, with a model comprising a spherical shell of matter surrounding a GW source. We find analytic expressions for the GWs when the background is Minkowskian, but for a general spherically...
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Monis Naidoo (Rhodes University; National Institute for Theoretical and Computational Sciences (NITheCS))14/07/2026, 17:45Oral presentation
Core-collapse supernovae
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Expectations of detections of gravitational waves (GWs) originating from
core-collapse supernovae (CCSNe) have been growing. Whilst detections
with current interferometers limit the frequency range and also limit the
distance to that of galactic origin or its vicinity, estimates of detectable GWs
from CCSNe are of the order of a handful per century. This would... -
Prof. Sergey Bulanov (ELI-ERIC, ELI BEAMLINES, Za Radnicí 835, Dolní Břežany, 25241, Czech Republic)15/07/2026, 09:00Invited talk
We propose a mechanism for fast radio bursts (FRBs) based on photon acceleration by relativistic shocks in highly magnetized electron-positron plasmas, as expected in magnetar magnetospheres. Density modulations at the shock front create relativistically moving refractive index perturbations that transform low-frequency electromagnetic precursors into enhanced high-frequency radiation. In...
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Yuanbin Wu (Nankai University)15/07/2026, 09:35Invited talk
Owing to the capability of providing extreme conditions such as extremely intense electromagnetic files and high-energy-density environments in the laboratory, high-power laser facilities offer powerful platforms for the studies of various research fields such as particle physics, nuclear physics, and astrophysics. In this talk, we will present and discuss our recent progresses on the studies...
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Gregory Vereshchagin (ICRANet)15/07/2026, 10:10Invited talk
Cooling of newborn quark stars occurs through neutrino emission from their interiors and photon and electron-positron pairs emission from their surface. We will discuss the cooling process of bare hot quark stars with particular emphasis on luminosity and spectrum, providing input for ongoing observational programs in X-rays.
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Chul Min Kim (Center for Relativistic Laser Science, IBS; and Advanced Photonics Research Institute, GIST)15/07/2026, 11:15Invited talk
Nonlinear Compton scattering (NCS), the merging of multiple photons into one photon through collision with an energetic electron, is a fundamental process in strong-field quantum electrodynamics (SFQED). The degree of nonlinearity in NCS is quantified by the quantum nonlinearity parameter $\chi$,[1] defined as the electromagnetic field strength observed by the electron in its rest frame...
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Jorge Armando Rueda Hernandez (ICRANet)15/07/2026, 11:50Invited talk
We discuss alternative astrophysical probes of dark matter by estimating its effects on the dynamics and structure of compact objects, such as white dwarfs, neutron stars, and black holes. We analyze gravitational dynamical friction on compact-object binaries, dark-matter accretion, and tidal disruption, and how these effects constrain the nature of the dark-matter particle in observed...
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Prof. Yousef Sobouti (Institute for Advanced Studies in Basic Sciences - Zanjan)15/07/2026, 12:25Invited talk
Abstract
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Quarks, as spin-$1/2$ particles, can be described as Dirac spinors, and as massive entities, they are capable of curving their surrounding spacetime. We demonstrate that the general relativistic (GR) gravitation of quarks is sufficient to confine them within hadrons while allowing them to remain asymptotically free. Consequently, we conclude that strong nuclear forces and general... -
Maura Pilia (INAF - Osservatorio Astronomico di Cagliari)15/07/2026, 15:00
In this talk I will review the Northern Cross FRB project, the ongoing effort to equip and use the Northern Cross (NC), the oldest Italian radio telescope, to observe FRBs. I will present the project's main results, highlighting the studies on known FRB repeaters and the population studies within our Galaxy and in a sample of star-forming nearby galaxies. Finally I will describe the future...
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Dr Yerlan Aimuratov (Fesenkov Astrophysical Institute)15/07/2026, 15:35
Observations of supernovae (SNe) Ic occurring after the prompt emission of long gamma-ray bursts (GRBs) are addressed within the binary-driven hypernova (BdHN) model, where GRBs originate from a binary composed of 10 solar masses carbon–oxygen (CO) star and a neutron star (NS). We report on recent progress in understanding the phenomenon and draw some prospects on GRB-SN research.
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Eugene Oks (Auburn University, USA)15/07/2026, 16:10Oral presentation
The explanation of a puzzling observation by Bowman et al 2018 (Nature, 555, 67) of the redshifted 21 cm spectral line from the early Universe, where it was found that the absorption in this line was about 2 to 3 times stronger than predicted by the standard cosmology and thus the primordial hydrogen gas was significantly cooler than predicted by the standard cosmology, required as the cooling...
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Sergei Grebenev (Space Research Institute, Moscow)15/07/2026, 16:45
We present our numerical computations of the broadband radiation spectra forming in a layer of high-temperature ($kT_{\rm e}\sim 50$ keV) semitransparent (with a Thomson optical depth $\tau_{\rm T}\sim 1-3$) plasma with an electron density $N_{\rm e}\sim 10^{17}-10^{19}\ \mbox{cm}^{-3}$ typical for the accretion disk regions surrounding a black hole in X-ray binaries. The computations take...
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Dr Bobir Toshmatov (New Uzbekistan University)15/07/2026, 17:00Oral presentation
We demonstrate how the shadow radius of regular black holes can serve as a powerful diagnostic tool for general relativity coupled with nonlinear electrodynamics (NED). By analyzing Bardeen-like, Hayward-like, and Maxwellian regular spacetimes, we highlight the critical distinction between standard null geodesics and the NED-driven effective photonsphere that governs light propagation. We show...
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Muhammad Usman (Institute of Space Technology (IST), Islamabad)15/07/2026, 17:15Oral presentation
We investigate the quantum dynamics of a spatially homogeneous quintessence field. It is thought that the ground state of the quintessence acts as the cosmological constant in the dynamical dark energy framework. The correlation function and power spectrum of quantum fluctuations exhibit ultraviolet divergence. To address this issue, we reformulate the system by interpreting quintessence as a...
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Kirill Zhirkov (Lomonosov Moscow State University)15/07/2026, 17:30Oral presentation
In 2013, neutrino observatory IceCube first reported discovery of high-energy (100 TeV and more) neutrinos of astrophysical origin. However, due to a bad spatial localization of these neutrinos (more than 1 arcdegree) origin of these neutrinoes stayed unknown. To find their progenitor, IceCube Collaboration organized multimessenger observations. Since 2016, IceCube Collaboration has published...
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Prof. Andrzej Radosz (Institute of Theoretical Physics, Wroclaw University of Science and Technology, Wroclaw, Poland)15/07/2026, 17:45Oral presentation
In a large class of cosmological models quantization of a scalar free field leads to the picture of a system of harmonic oscillators coupled via terms corresponding to creation/annihilation of pairs of particles, obeying momentum conservation. In such a case, an evolution of a creation/annihilation operators, meant as a Bogolyubov transformation, may be regarded as a “rotation” in a...
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Wentao Luo (USTC)16/07/2026, 09:00Invited talk
This work presents, for the first time, direct constraints on the black hole─halo mass relation using weak gravitational-lensing measurements. We construct type I and type II active galactic nucleus (AGN) samples from the Sloan Digital Sky Survey, with a mean redshift of 0.4 (0.1) for type I (type II) AGNs. This sample is cross correlated with weak-lensing shear from the Ultraviolet Near...
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Shurui Zhang (ICRANet)16/07/2026, 09:35Invited talk
We report on the increase in irreducible mass resulting from a particle’s plunge along the inner most stable circular orbit (ISCO) into a black hole (BH), examining both cases: the conservative approximation and with gravitational wave (GW) radiation; the former corresponds to BH accretion, and the latter to extreme mass-ratio inspirals (EMRIs). For prograde orbits, we find that the ratio of...
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Arman Tursunov (Silesian University in Opava and Max Planck Institute for Radio Astronomy)16/07/2026, 10:10Invited talk
Rotating black holes provide a unique environment for extracting energy from spacetime rotation through processes occurring inside the ergosphere. In this presentation, I will review the classical Penrose mechanism and its electromagnetic extensions, with particular focus on the electric and magnetic Penrose processes. These mechanisms allow charged particles to gain energy through...
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Bin Chen (Ningbo University)16/07/2026, 11:15Invited talk
A key challenge in imaging supermassive black holes is disentangling gravitational effects from plasma physics in order to accurately determine spacetime properties, particularly black hole spin. In our recent work, we present a fully covariant and rigorous analysis of the synchrotron emission from accreting plasma in the equatorial plane in the stationary, axisymmetric, high-conductivity...
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Jutta Kunz (University of Oldenburg)16/07/2026, 11:50Invited talk
Black holes, with their strong gravitational fields, provide an important testing ground for theories of gravity beyond General Relativity. Among the many proposed alternatives, considerable recent work has focused on scalar-tensor theories in which a scalar field couples to higher-curvature terms. The black hole solutions that arise in such theories can differ significantly from the...
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Volker Perlick16/07/2026, 12:25Invited talk
Analytical calculations of gravitational lensing by black holes and other compact or ultracompact objects, in particular of the shadow, were originally always done under the assumption that light rays are lightlike geodesics of the spacetime metric, i.e., that effects of a medium can be neglected. More recently the effect of a plasma was taken into account in numerous papers, where the plasma...
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Carlos Raúl Argüelles (Universidad Nacional de La Plata)16/07/2026, 15:00Invited talk
The study of disc accretion physics around supermassive black hole (BH) candidates provides essential theoretical tools to test their nature. In this talk I present recent results about the accretion flow and associated emission using generalised α-discs accreting onto horizonless dark compact objects, and compare with the traditional BH scenario. The BH alternative consists in a dense and...
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Roman Krivonos (Space Research Institute (IKI), Moscow, Russia)16/07/2026, 15:35Invited talk
Long-term observations of the Galactic center in the X-ray band reveal a new picture of the stellar population in this densely populated region. This review will present recent studies of the region of supermassive black hole Sagittarius A* using ultra-deep observations from the Chandra, Swift, and NuSTAR observatories. (1) An analysis of the X-ray spectra of more than a hundred sources within...
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Prof. Oleg Zaslavskii (Kharkov V. N. Karazin National University)16/07/2026, 16:10Oral presentation
During last decade and a half many results are obtained that show when (i) particle collisions in a strong gravitational eld lead to an unbounded energy in the center of mass Ec:m: of two colliding particles, (ii) when the process leads also to signi cant energy extraction measured at in nity. The set of possible scenarios can be divided to three main cases: (i) collisions near black holes,...
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Asghar Qadir (None)16/07/2026, 16:45Oral presentation
A modification of the Einstein-Hilbert Lagrangian by introducing an explicit coupling between the gravitational field, given by the Weyl tensor, and the matter-energy content, given by the stress-energy tensor, was proposed to explain flat galactic rotation curves without the exotic (non-baryonic) dark matter (DM) [Qadir, A., and Lee, H.W., IJMPD, 28, 2040014, (2019)], as Modified Relativistic...
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Lorenzo Iorio (MIM)16/07/2026, 17:00Oral presentation
Recently, a perturbative calculation to the first post--Newtonian order has shown that the analytically worked out Lense--Thirring precession of the orbital angular momentum of a test particle following a circular path around a massive spinning primary is able to explain the measured features of the jet precession of the supermassive black hole at the centre of the giant elliptical galaxy M87....
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Martin Kološ (Institute of Physics, Silesian University in Opava)16/07/2026, 17:15Oral presentation
A rotating black hole immersed in an external uniform magnetic field acquires an induced electric charge — the Wald charge — through frame-dragging of the surrounding electromagnetic field. In this work we examine the formation of the Wald charge and its impact on the motion of charged particles near magnetized black holes. We combine an analytical treatment of the induced field structure with...
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Stanislav Komarov (Belarusian State University)16/07/2026, 17:30Oral presentation
The charged axially-symmetric conductor with charge in the vicinity of Kerr black hole is considered. The electromagnetic field of this conductor in the form of multipole expansion is calculated by using the Teukolsky equation. The structure of electric and magnetic field lines is analyzed. The case when conductor is located almost at the event horizon is considered. The astrophysical...
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Dr Reinoud Slagter (ASFYON, Astronomisch Fysisch Onderzoek Nederland)16/07/2026, 17:45Oral presentation
It is believed that black holes remain a clean laboratoryfor probing ideas about quantum gravity. Decades of work on these obscure objects have shown they behave could behave like ordinary thermodynamic systems with temperature and entropy, or to the extreme, even as elementary particles.
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It remains a huge challenge to reconcile the large-scale properties with the underlying quantum... -
Mario Ballardini17/07/2026, 09:00Invited talk
The standard cosmological model successfully describes a wide range of observations, yet the nature of dark matter and dark energy remains unknown. Euclid is ESA’s space mission designed to address these questions by mapping the extragalactic sky with high-resolution optical imaging and near-infrared photometry and spectroscopy. Its main cosmological probes, weak gravitational lensing and...
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Maria Dainotti (National Astronomical Observatory of Japan)17/07/2026, 09:35Invited talk
Testing the $Λ$CDM model requires cosmological probes spanning the wide redshift interval between Type Ia Supernovae (SNe Ia, $z\lesssim2.9$) and the Cosmic Microwave Background (CMB, $z\approx1100$). Gamma-Ray Bursts (GRBs), observed up to redshift $z=9.2$, offer the opportunity to explore this regime. Here, we investigate how many GRBs are needed to become a useful cosmological probe capable...
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Narek Sahakyan (ICRANet-Armenia)17/07/2026, 10:10Invited talk
Astrophysics is entering a data-rich era driven by multi-wavelength observatories and multi-messenger experiments. These facilities produce vast, heterogeneous datasets that challenge traditional analysis pipelines. General-purpose AI systems, while powerful, often lack the contextual reasoning and scientific rigor required for astrophysical interpretation. AstroGenesis is an AI-powered,...
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Tsvi Piran (The Hebrew University)17/07/2026, 11:15Invited talk
A tidal disruption event (TDE) occurs when an ill-fated star ventures too close to a black hole. The intense gravitational forces of the black hole rip the star apart, sending roughly half of its mass hurtling into space, while the remainder falls back toward the black hole. This process produces a rich, multiwavelength observational signature—typically including an optical and ultraviolet...
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Mile Karlica (Astronomical Observatory Belgrade)17/07/2026, 11:50Invited talk
Numerous observations and numerical simulations show us that non-homogeneous magnetic fields are ubiquitous within astrophysical phenomena, be it in a regular or stochastic way. Nevertheless, models of astrophysical non-thermal radiation (namely synchrotron radiation) rarely address all the aspects of this matter. In this talk we will examine the limits of the standard synchrotron theory used...
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Manuel Hohmann (University of Tartu)17/07/2026, 12:25Invited talk
One of the most important open questions in cosmology is the so-called Hubble tension, which is an apparent disagreement between local universe measurements of the present-time Hubble parameter and measurements inferred from early-universe observations under the assumption of the $\Lambda$CDM model, which supplements general relativity (GR) with a cosmological constant $\Lambda$ and cold dark...
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Dr Laura Marcela Becerra Bayona (Universidad Industrial de santander)17/07/2026, 15:00Invited talk
I will present smoothed-particle hydrodynamics (SPH) simulations of the binary-driven hypernova (BdHN) scenario for long gamma-ray bursts (GRBs), focusing on the stability of the binary system during the supernova (SN) explosion. The progenitor of a BdHN consists of a carbon–oxygen (CO) star and a neutron-star (NS) companion. The core collapse of the CO star triggers an SN explosion and forms...
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Prof. Giorgio SONNINO (International SOLVAY Institutes for Physics and Chemistry & Université Libre de Bruxelles (U.L.B.))17/07/2026, 15:35Invited talk
Using the Christodoulou-Ruffini and Hawking mass-energy relations as a starting point, we investigate the properties of extreme black holes from a differential-geometry perspective. The geometry of black-hole horizons is of fundamental importance, as it offers deep insight into the structure of spacetime and the behavior of gravitating systems in the strong-field regime. We present two...
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Prof. Banibrata Mukhopadhyay (Indian Institute of Science)17/07/2026, 16:10Oral presentation
Over the last one and half decades, along with my group members and collaborators, I have been exploring the possible existence of (highly) magnetized white dwarfs exceeding the Chandrasekhar limit. This helps understanding perculiar over-luminous type Ia supernovae which predict their progenitor mass well above 1.4 solar mass Chandrasekhar limit. By theory, numerical calculations and...
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Noraiz Tahir (Department of Physics and Astronomy, School of Natural Sciences (SNS), National University of Science and Technology (NUST), H12, Islamabad, Pakistan)17/07/2026, 16:45Oral presentation
It had been proposed [Qadir A., Tahir N., and Sakhi M., PRD 100, (2019)] that virial clouds “propped up” by the cosmic microwave background (CMB), and hence at that temperature, populate dark matter halos and may account for a significant fraction of the missing baryons. To understand the nature of these clouds, it is necessary to trace their evolution from the last scattering surface (LSS)...
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Dr Igor Kanatchikov (Natl. Quantum Information Center in Gdansk)17/07/2026, 17:00Oral presentation
We show that a variety of non-Keplerian galaxy rotation curves, together with the corresponding modifications of the Newtonian potential and dynamics, including MOND, qMOND, and mMOND-type behaviors, can be derived for test particles propagating on a background quantum geometry associated with a quantum spin connection, as described by precanonical quantum gravity (pQG).
In particular, we...
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Simone Monda (Università degli Studi di Salerno)17/07/2026, 17:15Oral presentation
Spacetime torsion provides a natural bridge between spin, gravity and quantum fields, and may leave observable imprints in fermionic sectors relevant to cosmology. I will discuss recent results on neutrino mixing in torsionful spacetimes within a quantum-field-theoretical framework, focusing on the phenomenological aspects most directly connected with relativistic astrophysics, quantum gravity...
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Fernando Izaurieta (Universidad San Sebastián)17/07/2026, 17:30Oral presentation
A single geometric invariant fixes the relative normalization and structure of gravity, Yang-Mills theory, and fermion kinetic terms, including ghost freedom in the gravitational sector, without tuning. Our results establish a minimal geometric route to unification that does not rely on extra dimensions or symmetry breaking by hand. Unlike previous gauge-gravity constructions, the relative...
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Stephan Walrand (université catholique de Louvain)17/07/2026, 17:45Oral presentation
Addressing the Hubble Tension via Granular Metric Anchoring of Early Baryonic Gravitational Self-Energy
Stephan Walrand stephan.walrand@uclouvain.be ORCID: 0000-0002-0120-684X
In a recent publication, we derived a general relativity gauge-invariant solution modelling a granular universe composed of spherical bodies with a radial Gaussian density profile. In this framework, a cosmological...
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Remo Ruffini (ICRANet, ICRA, INAF)17/07/2026, 17:55
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Baptiste SirventeOral presentation
We present a general relativistic framework to calculate the rate at which a compact star accretes dark matter particles from its environment. We apply the framework to a realistic neutron star in a fermionic dark matter halo. We discuss the effect of accreted dark matter on the interior structure and stability of the neutron star and outline astrophysical consequences, extensions, and...
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Valentina Crespi (Instituto de Astrofísica de La Plata)Invited talk
Over the last decades, it has been established that dark matter (DM) rearranges around compact objects, forming over-densities known as spikes. We focus on the framework based on the Ruffini-Argüelles-Rueda (RAR) model, where the quantum nature of keV-fermions leads to a distinct core-halo morphology. In this context, we address the scenario where a central Supermassive Black Hole (SMBH)...
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