Accretion onto a small black hole at the center of a neutron star
Autor: | Chloe B Richards, Thomas W. Baumgarte, Stuart L. Shapiro |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Physics
High Energy Astrophysical Phenomena (astro-ph.HE) Bondi accretion 010308 nuclear & particles physics General relativity Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Center (group theory) Astrophysics General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences Accretion (astrophysics) General Relativity and Quantum Cosmology Article Black hole Neutron star Orders of magnitude (time) 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics 010306 general physics Astrophysics - High Energy Astrophysical Phenomena Astrophysics::Galaxy Astrophysics |
Zdroj: | Phys Rev D |
Popis: | We revisit the system consisting of a neutron star that harbors a small, possibly primordial, black hole at its center, focusing on a nonspinning black hole embedded in a nonrotating neutron star. Extending earlier treatments, we provide an analytical treatment describing the rate of secular accretion of the neutron star matter onto the black hole, adopting the relativistic Bondi accretion formalism for stiff equations of state that we presented elsewhere. We use these accretion rates to sketch the evolution of the system analytically until the neutron star is completely consumed. We also perform numerical simulations in full general relativity for black holes with masses up to nine orders of magnitude smaller than the neutron star mass, including a simulation of the entire evolution through collapse for the largest black hole mass. We construct relativistic initial data for these simulations by generalizing the black hole puncture method to allow for the presence of matter, and evolve these data with a code that is optimally designed to resolve the vastly different length scales present in this problem. We compare our analytic and numerical results, and provide expressions for the lifetime of neutron stars harboring such endoparasitic black holes. 20 pages, 9 figures; version published in PRD |
Databáze: | OpenAIRE |
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