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@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.
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