The Fifth Zeldovich Meeting

Session

Thursday morning session

Jun 15, 2023, 9:00 AM

Conveners

Thursday morning session

• Yu Wang (ICRANet, INAF)

87. Compact Star Merger as Progenitor of Low Redshift GRBs and the Occurrence Rates of Gravitational Sources and Kilonovae (online talk)

Prof. Vahe Petrosian (Stanford University)

6/15/23, 9:00 AM

Bimodal distribution of duration of gamma-ray bursts (GRBs) has led to two progenitors; compact star mergers (two neutron stars, NSs or a NS and a black hole), for short GRBs (SGRBs),
and collapsars for long GRBs (LGRBs). It is expected that formation rate (FR) of LGRBs should be similar to the cosmic SFR, while that of SGRBs to be delayed relative to the SFR.
The localization of some...

23. New quantum technologies and gravity

Claus Laemmerzahl (University of Bremen)

6/15/23, 9:30 AM

As has been emphasized in the talk of Hansjoerg Dittus, the second quantum revolution enables new technologies which are not accessible through classical physics. These technologies are characterized by the engineering and manipulating of quantum states. In this talk the interface between these new technologies and the gravitational interaction is highlighted by considering a few topics: (i) a...

25. Quantum sensing – the key technology for further gravitational experiments in space

Hansjoerg Dittus (University of Bremen)

6/15/23, 10:00 AM

Progress in physics always has been stimulated by unexplained observations or experiments. Expressions like “dark matter” or “dark energy” might help to apply the present standard physical theories, but cannot explain their origin sufficiently. The situation of fundamental physics today still causes a lot of open questions, e.g. the theoretical inconsistency of quantum mechanics and General...

20. Influence of a plasma on the shadow of black holes

Volker Perlick

6/15/23, 11:00 AM

If a black hole is seen against a backdrop of bright light sources, it forms as dark disc on the observer's sky, known as the "shadow" of the black hole. If one assumes that light rays are not influenced by a medium, i.e., if one assumes that they are lightlike geodesics of the spacetime metric, the boundary curve of the shadow can be analytically determined, provided that the spacetime is...

46. Black holes in alternative theories of gravity

Prof. Jutta Kunz (University of Oldenburg)

6/15/23, 11:30 AM

Black holes represent ideal laboratories to test Einstein's theory of general relativity and alternative theories of gravity. Alternative theories of gravity typically introduce additional degrees of freedom, among them most prominently a scalar field. Depending on the theory, the resulting black holes may then differ significantly from their counterparts in General Relativity. Possessing...

3. Near field cosmology with constrained simulations: an overview

Stefan Gottloeber (AIP Potsdam)

6/15/23, 12:00 PM

Numerical simulations are the driving force behind much of the theoretical
progress in our understanding of the formation of structure in the
universe. Cosmological simulations must cover a large dynamical and mass
range. A representative volume of the universe should be large, but this
comes at the expense of the resolution. To overcome this problem we developed a new approach over the...

82. Physics on the event horizon scale with millimetre and submillimetre interferometry

Dr Andrei Lobanov (Max-Planck-Institut für Radioastronomie)

6/15/23, 12:30 PM

Impressive progress has been achieved recently in studies addressing fundamental physical processes near the event horizon scale of putative cosmic black holes. The detection of gravitational waves, the near infrared interferometry measurements of relativistic stellar orbits and accretion disk hot spot motion in the Galactic Centre, and the millimetre interferometry imaging of the strong...