Astrophysical cloaking of a naked singularity

@article{76723,
   author = {Vieira, Ronaldo S S and Kluźniak, Wlodzimierz},
   article_number = {3},
   doi = {http://dx.doi.org/10.1093/mnras/stad1718},
   keywords = {gravitation;stars: atmospheres;stars: neutronlGalaxy: centre;quasars: supermassive black holes;X-rays: binaries},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Astrophysical cloaking of a naked singularity},
   url = {https://academic.oup.com/mnras/article/523/3/4615/7193379?login=true},
   volume = {523},
   year = {2023}
}

TY  - JOUR
ID  - 76723
AU  - Vieira, Ronaldo S S - Kluźniak, Wlodzimierz
PY  - 2023
TI  - Astrophysical cloaking of a naked singularity
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 523
IS  - 3
SP  - 4615-4623
EP  - 4615-4623
SN  - 00358711
KW  - gravitation;stars: atmospheres;stars: neutronlGalaxy: centre;quasars: supermassive black holes;X-rays: binaries
UR  - https://academic.oup.com/mnras/article/523/3/4615/7193379?login=true
N2  - A massive naked singularity would be cloaked by accreted matter, and thus may appear to a distant observer as an opaque (quasi-)spherical surface of a fluid, not unlike that of a star or planet. We present here analytical solutions for levitating atmospheres around a wide class of spherically symmetric naked singularities. Such an atmosphere can be constructed in every space-time which possesses a zero-gravity radius and which is a solution of a (modified-)gravity theory possessing the usual conservation laws for matter. Its density peaks at the zero-gravity radius and the atmospheric fluid is supported against infall onto the singularity by gravity alone. In an astrophysical context, an opaque atmosphere would be formed in a very short time by accretion of ambient matter onto the singularity - in a millisecond for an X-ray binary, in a thousand seconds for a singularity traversing interstellar space, and a thousand years for a singularity that is the central engine of an AGN.
ER  - 

VIEIRA, Ronaldo S S a Wlodzimierz KLU$\backslash$'ZNIAK. Astrophysical cloaking of a naked singularity. \textit{Monthly Notices of the Royal Astronomical Society}. 2023, roč.~523, č.~3, s.~4615-4623. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stad1718.