Accretion onto black holes inside neutron stars with piecewise-polytropic equations of state: Analytic and numerical treatments

@article{Schnauck2021AccretionOB,
  title={Accretion onto black holes inside neutron stars with piecewise-polytropic equations of state: Analytic and numerical treatments},
  author={Sophia C. Schnauck and Thomas W. Baumgarte and Stuart L. Shapiro},
  journal={Physical Review D},
  year={2021}
}
We consider spherically symmetric accretion onto a small, possibly primordial, black hole residing at the center of a neutron star governed by a cold nuclear equation of state (EOS). We generalize the relativistic Bondi solution for such EOSs, approximated by piecewise polytropes, and thereby obtain analytical expressions for the steady-state matter profiles and accretion rates. We compare these rates with those found by time-dependent, general relativistic hydrodynamical simulations upon… 
View PDF on arXiv

Figures and Tables from this paper

References

SHOWING 1-10 OF 67 REFERENCES
Accretion onto a small black hole at the center of a neutron star.
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.…
Growth of black holes in the interior of rotating neutron stars
Mini-black holes made of dark matter that can potentially form in the interior of neutron stars always have been thought to grow by accreting the matter of the core of the star via a spherical Bondi…
Computing supernova collapse to neutron stars and black holes
We present a new numerical code for spherical hydrodynamics in general relativity. The code can handle gravitational collapse to a neutron star or to a black hole without the appearance of…
Fate of a neutron star with an endoparasitic black hole and implications for dark matter
We study the dynamics and observational signatures of a neutron star being consumed by a much less massive black hole residing inside the star. This phenomenon could arise in a variety of scenarios,…
Accretion of matter by condensed objects
The equations of motion for steady-state spherical symmetric flow of matter into or out of a condensed object (e.g. neutron stars, ‘black holes’, etc.) are displayed and solved for simple polytropic…
Observational constraints on hyperons in neutron stars
The possibility that neutron stars may contain substantial hyperon populations has important implications for neutron-star cooling and, through bulk viscosity, the viability of the r-modes of…
Numerical relativity simulations of binary neutron stars
We present a new numerical relativity code designed for simulations of compact binaries involving matter. The code is an upgrade of the BAM code to include general relativistic hydrodynamics and…
Binary black hole mergers in gaseous environments: 'Binary Bondi' and 'binary Bondi-Hoyle-Lyttleton' accretion
Merging supermassive black hole-black hole binaries produced in galaxy mergers are promising sources of detectable gravitational waves. If such a merger takes place in a gaseous environment, there is…
Neutron stars as dark matter probes
We examine whether the accretion of dark matter onto neutron stars could ever have any visible external effects. Captured dark matter which subsequently annihilates will heat the neutron stars,…
Can primordial black holes as all dark matter explain fast radio bursts?
Primordial black holes (PBHs) are one of the most interesting non-particle dark matter (DM) candidates. They may explain all the DM content in the Universe in the mass regime about 10−14M − 10−11M .…
...
1
2
3
4
5
...