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SUMMARY:A Neutron Star Hidden Inside a Black Hole
DTSTART;VALUE=DATE-TIME:20261109T033000Z
DTEND;VALUE=DATE-TIME:20261109T040000Z
DTSTAMP;VALUE=DATE-TIME:20261023T124415Z
UID:indico-contribution-2937@indico.itp.ac.cn
DESCRIPTION:Speakers: Chen Tan (Lanzhou University)\nWe investigate dark m
 atter admixed neutron stars in which the neutron star coexists with an ani
 sotropic dark matter halo described by the Einasto density profile\, a mod
 el recently shown to produce regular\, singularity-free black hole solutio
 ns~[Phys. Rev. D \\textbf{113}\, 043011 (2026)].\nSolving the modified Tol
 man--Oppenheimer--Volkoff equations with two different equations of state 
 (BSk19 and SLy4)\, we find that the dark matter halo significantly alters 
 the neutron star structure.\nFurthermore\, for a specific range of halo pa
 rameters\, $g_{rr}^{-1}$ changes sign outside the stellar surface\, formin
 g an event horizon with the neutron star persisting as a regular configura
 tion inside it--- ``neutron stars in black holes''.\nThis configuration ap
 pears in both equations of state and does not depend on a specific choice 
 of the equation of state.\nThe discovery of this configuration provides a 
 new perspective and a concrete computable instance for the study of what l
 ies inside a black hole.\n\nhttps://indico.itp.ac.cn/event/417/contributio
 ns/2937/
LOCATION:
URL:https://indico.itp.ac.cn/event/417/contributions/2937/
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