1st TEONGRAV international workshop on theory of gravitational waves

Session

TEONGRAV Session

18 Sept 2024, 15:20

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

54. Black-hole ringdown and their progenitors: from numerical Relativity to tests of GR

Costantino Pacilio (Istituto Nazionale di Fisica Nucleare)

18/09/2024, 15:20

Black-hole ringdowns from binary coalescences encode information about the final state of the remnant through their modes of oscillation, and about their progenitors through the degree of excitation of different modes. We present novel surrogate fits for the excitation amplitudes of black-hole ringdowns from quasi-circular binaries. They are calibrated to numerical relativity simulations and...

90. Effective-one-body, Post-Minkowskian and Numerical Relativity

Dr Piero Rettegno (INFN - sezione di Torino)

18/09/2024, 15:40

Detection and analysis or gravitational wave signals rely on fast and accurate theoretical models.
In particular, the effective-one-body (EOB) framework proved very fruitful in bridging the gap between
analytical (approximated) solutions of Einstein’s equations and numerical relativity (NR) information.

The improved sensitivity of interferometers will allow for detection of different...

2. Primordial black holes or else? TIdal tests on subsolar gravitational wave observations

Francesco Crescimbeni (Istituto Nazionale di Fisica Nucleare)

18/09/2024, 16:40

The detection of a subsolar object in a compact binary merger is regarded as one of the smoking gun signatures of a population of primordial black holes (PBHs). We critically assess whether these systems could be distinguished from stellar binaries, for example composed of white dwarfs or neutron stars, which could also populate the subsolar mass range. At variance with PBHs, the...

85. Gravitational waves from subsolar compact objects: implications for cosmology and high-density nuclear physics

Massimo Vaglio (SISSA)

18/09/2024, 17:00

The detection of a subsolar-mass gravitational wave event would have significant implications for both cosmology and nuclear physics. In this study, we investigate the potential impact of such a discovery, which may occur during the ongoing or future LIGO-Virgo-KAGRA observing runs. The nature of a subsolar binary system—whether composed of light neutron stars, primordial black holes, or other...

6. Classifying binary black holes from Population III stars using machine learning and the Einstein Telescope

Filippo Santoliquido (Istituto Nazionale di Fisica Nucleare)

18/09/2024, 17:20

Third-generation (3G) gravitational-wave (GW) detectors like the Einstein Telescope (ET) will observe binary black hole (BBH) mergers at redshifts up to z ∼ 100. However, unequivocal determination of the origin of high-redshift sources will remain uncertain, due to the low signal-to-noise ratio (SNR) and poor estimate of their luminosity distance. This study proposes a machine learning...