Conveners
Gravity and black holes
- Jorge Armando Rueda Hernandez (ICRANet)
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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...