General relativistic simulations of high-mass binary neutron star mergers: rapid formation of low-mass stellar black holes
Küçük Resim Yok
Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Oxford University Press
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Almost a hundred compact binary mergers have been detected via gravitational waves by the LIGO-Virgo-KAGRA collaboration in the past few years providing us with a significant amount of new information on black holes and neutron stars. In addition to observations, numerical simulations using newly developed modern codes in the field of gravitational wave physics will guide us to understand the nature of single and binary degenerate systems and highly energetic astrophysical processes. We here presented a set of new fully general relativistic hydrodynamic simulations of high-mass binary neutron star systems using the open-source EINSTEIN TOOLKIT and LORENE codes. We considered systems with total baryonic masses ranging from 2.8 M? to 4.0 M? and used the SLy equation of state. We analysed the gravitational wave signal for all models and report potential indicators of systems undergoing rapid collapse into a black hole that could be observed by future detectors like the Einstein Telescope and the Cosmic Explorer. The properties of the post-merger black hole, the disc and ejecta masses, and their dependence on the binary parameters were also extracted. We also compared our numerical results with recent analytical fits presented in the literature and provided parameter-dependent semi-analytical relations between the total mass and mass ratio of the systems and the resulting black hole masses and spins, merger frequency, BH formation time, ejected mass, disc mass, and radiated gravitational wave energy. © The Author(s) 2023.
Açıklama
Anahtar Kelimeler
gravitational waves, hydrodynamics, methods: numerical, neutron star mergers, software: simulations, Black holes, Codes (symbols), Cosmology, Equations of state, Gravitational effects, Hydrodynamics, Mergers and acquisitions, Merging, Neutrons, Numerical methods, Open source software, Open systems, Relativity, Stars, Binary neutron stars, Black holes, Gravitational-waves, Low-mass, Method: numerical, Neutron star merger, Neutron stars, Relativistics, Software simulation, Stellars, Gravity waves
Kaynak
Monthly Notices of the Royal Astronomical Society
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
527
Sayı
3
