1st TEONGRAV international workshop on theory of gravitational waves

Session

TEONGRAV Session 2

17 Sept 2024, 11:10

Physics Department - Aula Conversi (Marconi Building) (Sapienza University of Rome)

13. Compact objects in and beyond the Standard Model.

Loris Del Grosso (La Sapienza University of Rome)

17/09/2024, 11:10

Compact objects are unique probes of the strong gravity regime and may be the key to understanding long-standing puzzles in fundamental physics. These include the nature of dark matter, the possible extension of Einstein's gravity, and the fate of spacetime singularities. The advent of gravitational-wave astronomy provides new observations with present and future interferometers and is a great...

95. Could Population III binary stars be the progenitors of massive stellar black hole binaries?

Federico Angeloni (Tor Vergata University, Sapienza University, INFN, INAF)

17/09/2024, 11:30

Massive stellar black hole binaries (MBHBs) descendent from population III (Pop. III) binary stars are dark sirens that could play an extremely important role in improving our understanding of the high-redshift Universe. The coalescences of these binaries will be detected by the next generation of ground-based gravitational-wave (GW) detectors; however it is possible that some of the MBHBs...

26. Quasi-local masses and cosmological coupling of astrophysical compact objects

Riccardo Murgia (GSSI (Gran Sasso Science Institute))

17/09/2024, 11:50

The possibility of a non-zero coupling between local astrophysical objects, such as black holes (BHs), and the large-scale cosmological dynamics, has a quite long history. Recently, there have been interesting developments on the issue, from both theoretical and observational points of view.
In this talk, I will discuss a General Relativity framework allowing the embedding of local objects...

36. Analytical coordinate time at first post-Newtonian order

Vittorio De Falco (Istituto Nazionale di Fisica Nucleare)

17/09/2024, 12:10

In this presentation, we exploit the Damour-Deruelle solution to derive the analytical expression of the coordinate time in terms of the polar angle. This formula has advantageous applications in both pulsar timing and gravitational-wave theory.

82. Population Properties of Massive Binary Black hole with LISA observations Using Iterative Reweighted Kernel Density Estimation Technique

Jam Sadiq (SISSA, Trieste, Italy)

17/09/2024, 16:20

We propose an adaptive Kernel density estimate (KDE) with selection effects as a non parametric method to study rates and population of massive black hole binary systems, which are expected to observe in LISA Observations. We used simulated LISA data for specific models of massive black hole binaries and applied adaptive KDE to construct distribution in total mass and redshift. We incorporated...

19. Phenomenological Properties of EMD Black Hole Binaries

Robin Croft (Istituto Nazionale di Fisica Nucleare)

17/09/2024, 16:40

Einstein-Maxwell-Dilaton-Black-Holes (EMDBHs) are a black hole solution of Einstein's equation of General Relativity. EMDBH's have electromagnetic charge (here non-spinning) and a stable scalar field configuration centred on the black hole due to the dilaton coupling in the action between the scalar field and electromagnetism. In this talk we will discuss various phenomenological properties of...

93. Spectroscopy in Einstein-Maxwell-scalar theories

Marco Melis (Istituto Nazionale di Fisica Nucleare)

17/09/2024, 17:00

The Einstein-Maxwell-scalar (EMS) theory provides an ideal framework to observe deviations from general relativity. A specific instance of this theory involves a scalar field that is minimally coupled to gravity and non-minimally coupled to the Maxwell field. In addition to the usual Reissner-Nordstrom solutions this theory also admits BH solutions with scalar hair. Another example is the...