Astrophysical cloaking of a naked singularity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F23%3AA0000300" target="_blank" >RIV/47813059:19630/23:A0000300 - isvavai.cz</a>
Result on the web
<a href="https://academic.oup.com/mnras/article/523/3/4615/7193379?login=true" target="_blank" >https://academic.oup.com/mnras/article/523/3/4615/7193379?login=true</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stad1718" target="_blank" >10.1093/mnras/stad1718</a>
Alternative languages
Result language
angličtina
Original language name
Astrophysical cloaking of a naked singularity
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
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Volume of the periodical
523
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
4615-4623
UT code for WoS article
001023556700032
EID of the result in the Scopus database
2-s2.0-85163857664