Black-hole hair in scalar-Gauss-Bonnet gravity is altered by cosmology

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00618590" target="_blank" >RIV/68378271:_____/25:00618590 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0366062" target="_blank" >https://hdl.handle.net/11104/0366062</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.111.L041502" target="_blank" >10.1103/PhysRevD.111.L041502</a>

Result language
angličtina
Original language name
Black-hole hair in scalar-Gauss-Bonnet gravity is altered by cosmology
Original language description
Static black holes in general relativity modified by a linear scalar coupling to the Gauss-Bonnet invariant always carry hair. We show that the same mechanism that creates the hair makes it incompatible with a cosmological horizon. Other scalar-tensor models do not have this problem when time dependence of the scalar provides a natural matching to cosmology. Scalar-Gauss-Bonnet gravity is particularly rigid, and such a scenario does not help. An extra operator makes the theory behave like the other models, and the cosmological horizon can be accommodated. The hair, however, is drastically altered.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/GA24-10780S" target="_blank" >GA24-10780S: New Precision Tests of the Dark Sector</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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