The Sixth Zeldovich meeting

Session

Sunyaev-Zeldovich effect and cosmology

13 Jul 2026, 09:00

ICRANet, Pescara, Italy

Conveners

Sunyaev-Zeldovich effect and cosmology

• There are no conveners in this block

Sunyaev-Zeldovich effect and cosmology

• Gregory Vereshchagin (ICRANet)

74. Opening

Remo Ruffini (ICRANet, ICRA, INAF)

13/07/2026, 09:00

77. What is possible to see in principle from the next exoplanet? (TBC)

Roland Walter

13/07/2026, 09:35

56. Working 22 years together with my Great Mentor Yakov Zeldovich: from CMB cosmology and theory of accretion onto black holes and neutron stars to four successful Orbital Space Observatories

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, 10:10

Invited talk

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62. The Atacama Cosmology Telescope: Two Decades of Precision Cosmology

Elia Stefano Battistelli (Spaienza University of Rome)

13/07/2026, 11:15

Invited 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...

59. Next Frontiers in Cosmology with CMB Spectral Distortions

Jens Chluba (JBCA)

13/07/2026, 11:50

Invited 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.

23. The Kinematic Sunyaev-Zeldovich Effect as a Test of Gravity

Patricio Gallardo (University of Pennsylvania)

13/07/2026, 12:25

Invited 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...

43. The LSST era: opportunities, challenges, and simulations for AGN science

Angela Bongiorno (INAF-Observatory of Rome)

13/07/2026, 13:00

Invited 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.
I will...

26. Fractal properties of the Cosmic Web

Jaan Einasto (Prof.)

13/07/2026, 15:00

Invited 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...

31. MOND: An alternative to particle dark matter

Federico Lelli (INAF - Arcetri Astrophysical Observatory)

13/07/2026, 15:35

Invited 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...

66. Little Red Dots as Sites for Cosmic Prebiotic Chemistry

Yu Wang (ICRA/ICRANet/INAF)

13/07/2026, 16:10

Invited 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.

61. Coherence-Regulated Structure Formation in Kalpa-Self-Regulating Cosmology (Kalpa-SRC)

Manasse Mbonye (University of Rwanda)

13/07/2026, 16:45

Invited 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...

50. The Sunyaev-Zel'dovich (SZ) effect in a gravitational field

Andrew KOSHELKIN (In person, Moscow, Russia)

13/07/2026, 17:00

Oral 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...

11. Spacetime foam correlation renders the cosmological constant (dark energy)

Prof. She-Sheng Xue (ICRANet, Physics Department, Sapienza University of Rome)

13/07/2026, 17:15

Oral 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...

7. Constraining Inflation Models with Spinning Voids

GeonWoo Kang (Seoul National University)

13/07/2026, 17:30

Oral 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...

49. Indications of relevant quantum corrections for cosmological parameters from unimodular quantum cosmology

Dr Natascha Riahi (University of Vienna)

13/07/2026, 17:45

Oral 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...