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Accretion onto endoparasitic black holes at the center of neutron stars

Date: 2021-01-01

Creator: Chloe B Richards

Access: Open access

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.


Miniature of Counter-Futurisms: Collaborative Survival and Communal Healing in a Climate-Changed World
Counter-Futurisms: Collaborative Survival and Communal Healing in a Climate-Changed World
This record is embargoed.
    • Embargo End Date: 2026-05-20

    Date: 2021-01-01

    Creator: Lianna Harrington

    Access: Embargoed



      Miniature of Daily, seasonal, and yearly timescales of seawater carbonate chemistry variability in Harpswell Sound and the Gulf of Maine
      Daily, seasonal, and yearly timescales of seawater carbonate chemistry variability in Harpswell Sound and the Gulf of Maine
      Access to this record is restricted to members of the Bowdoin community. Log in here to view.

          Date: 2021-01-01

          Creator: Eugen Florin Cotei

          Access: Access restricted to the Bowdoin Community