J 2019

Hawking radiation of non-Schwarzschild black holes in higher derivative gravity: A crucial role of grey-body factors

KONOPLYA, Roman and Antonina Frantsivna ZINHAILO

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

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

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

, GA19-03950S, RCTPA, RIVOK, SGS12-2019

Tags

International impact, Reviewed

Links

GA19-03950S, research and development project.
Změněno: 21/4/2020 10:32, Ing. Petra Skoumalová

Abstract

V originále

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.
Displayed: 28/12/2024 06:56