Hawking radiation of non-Schwarzschild black holes in higher derivative gravity: A crucial role of grey-body factors
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F19%3AA0000431" target="_blank" >RIV/47813059:19240/19:A0000431 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.104060" target="_blank" >https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.104060</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.99.104060" target="_blank" >10.1103/PhysRevD.99.104060</a>
Alternative languages
Result language
angličtina
Original language name
Hawking radiation of non-Schwarzschild black holes in higher derivative gravity: A crucial role of grey-body factors
Original language description
The higher derivative gravity includes corrections of the second order in curvature and allows for both Schwarzschild and non-Schwarzschild asymptotically flat black-hole solutions. Here, we find the grey-body factors and energy emission rates for Hawking radiation of test Dirac and electromagnetic fields in the vicinity of such a non-Schwarzschild black hole. The temperature and mass of the black hole monotonically decrease from their Schwarzschild values to zero when the coupling constant is increased up to its extremal value. Nevertheless, for small and moderate values of the coupling constant, the Hawking radiation is enhanced, and only in the regime of large coupling it is suppressed, as one could expect. The reason for such counterintuitive behavior is the important role of the grey-body factors: for small and moderate couplings, the temperature falls relatively slowly, while the effective potentials for black holes of the same mass become considerably lower, allowing for much higher transmission rates. We have also estimated the lifetime of such black holes and shown that the range of black-hole masses at which ultrarelativistic emission of massive electrons and positrons starts is shifted towards smaller black-hole masses when the coupling constant is large.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA19-03950S" target="_blank" >GA19-03950S: Testing strong gravity via black holes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
2470-0029
Volume of the periodical
99
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
„104060-1“-„104060-9“
UT code for WoS article
000469329900009
EID of the result in the Scopus database
2-s2.0-85066441367