KONOPLYA, Roman and Antonina Frantsivna ZINHAILO. Hawking radiation of non-Schwarzschild black holes in higher derivative gravity: A crucial role of grey-body factors. Physical Review D. 2019, vol. 99, No 10, p. "104060-1"-"104060-9", 9 pp. ISSN 2470-0010. Available from: https://dx.doi.org/10.1103/PhysRevD.99.104060.
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Basic information
Original name Hawking radiation of non-Schwarzschild black holes in higher derivative gravity: A crucial role of grey-body factors
Authors KONOPLYA, Roman (804 Ukraine, guarantor, belonging to the institution) and Antonina Frantsivna ZINHAILO (804 Ukraine, belonging to the institution).
Edition Physical Review D, 2019, 2470-0010.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/47813059:19240/19:A0000431
Organization unit Faculty of Philosophy and Science in Opava
Doi http://dx.doi.org/10.1103/PhysRevD.99.104060
UT WoS 000469329900009
Keywords in English Hawking radiation; higher derivative gravity; grey-body factors
Tags FÚ, GA19-03950S, RCTPA, RIVOK, SGS12-2019
Tags International impact, Reviewed
Links GA19-03950S, research and development project.
Changed by Changed by: Ing. Petra Skoumalová, učo 50554. Changed: 21/4/2020 10:32.
Abstract
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.
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