Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-23 18:03

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Conference: Bucharest University Faculty of Physics 2023 Meeting

Section: Atomic and Molecular Physics. Astrophysics. Applications

Title:

Multimessenger astronomy as a tool for modeling unresolved cosmic sources

Authors:

Florentina PÎSLAN(1,2), Laurențiu CARAMETE(1), Ana CARAMETE(1)

Affiliation:

1) Institute of Space Science, Romania

2) Faculty of Physics, University of Bucharest, Romania

E-mail

fcpislan@spacescience.ro

Keywords:

multi-messenger studies, gravitational waves, binary black hole systems

Abstract:

Recently, with the first discovery of gravitational waves (GW) by ground detectors (LIGO, VIRGO and KAGRA), the multi-messenger studies began in full with the aim of better understanding the astrophysical events that produced them. This involves observing, along the gravitational wave signal, other different messengers emerging from the same sources: photons with wavelengths spanning the whole electromagnetic spectrum and neutrinos. Here, we focused on binary black hole systems that emit GWs during their inspiraling and merging phases. The frequencies of GWs emitted by these super massive systems are below the detection limit of ground observatories and we need to go to space to detect them. We start from the electromagnetically observed objects that could qualify as inspiraling binary black hole systems and check if we can confirm their nature with GW searches. We consider different system configuration scenarios and, by analyzing both intrinsic and extrinsic parameters of the source and their effect on the shape of the GW spectrum in each case, we make a prediction of the capability of future space-based GW detectors such as LISA Mission to “hear” the GWs coming from these sources. When simulating the waveforms for different source configurations, we used the IMRPhenomD approximant and the (flat) LambdaCDM cosmological model. We conclude that future space-based GW observatories can detect counterpart signatures of previously electromagnetically observed objects and predict their evolution.