Discriminating same-mass Neutron Stars and Black Holes gravitational wave-forms
| Autor: | J.-F. Coupechoux, A. Arbey, R. Chierici, H. Hansen, J. Margueron, V. Sordini |
|---|---|
| Přispěvatelé: | Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
neutron star: binary
mass: solar General Relativity and Cosmology new physics gr-qc black hole: binary: coalescence Astrophysics::High Energy Astrophysical Phenomena gravitational radiation mass: gap FOS: Physical sciences detector: noise General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics Bayesian General Relativity and Quantum Cosmology electromagnetic [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] black hole: primordial Astrophysics::Galaxy Astrophysics |
| Popis: | Gravitational wave-forms from coalescences of binary black hole systems and binary neutron star systems with low tidal effects can hardly be distinguished if the two systems have similar masses. In the absence of discriminating power based on the gravitational wave-forms, the classification of sources into binary neutron stars, binary black holes and mixed systems containing a black hole and a neutron star can only be unambiguous when assuming the standard model of stellar evolution and using the fact that there exists a mass gap between neutron stars and black holes. This approach is however limited by its own assumptions: for instance the 2.6 solar mass object detected in the GW190814 event remains unclassified, and models of new physics can introduce new compact objects, like primordial black holes, which may have masses in the same range as neutron stars. Then, without an electromagnetic counterpart (kilonova), classifying mergers of compact objects without mass gap criteria remains a difficult task, unless the source is close enough. In what follows we investigate a procedure to discriminate a model between binary neutron star merger and primordial binary black hole merger by using a Bayes factor in simulated wave-forms that we superimpose to realistic detector noise. 18 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|