Details
| Original language | English |
|---|---|
| Article number | 136002 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 812 |
| Early online date | 11 Dec 2020 |
| Publication status | Published - 10 Jan 2021 |
Abstract
It has been observed that for black holes in certain family of Horndeski gravity theories Wald's entropy formula does not lead to the correct first law for black hole thermodynamics. For this family of Horndeski theories speeds of propagation of gravitons and photons are in general different and gravitons move on an effective metric different than the one seen by photons. We show that the temperature of the black hole should be modified from surface gravity over 2π to include effects of this effective metric. The modified temperature, with the entropy unambiguously computed by the solution phase space method, yields the correct first law. Our results have far reaching implications for the Hawking radiation and species problem, going beyond the Horndeski theories.
Keywords
- Black hole thermodynamics, Hawking radiation, Horndeski gravity, Wald entropy
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
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In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 812, 136002, 10.01.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - On black hole temperature in Horndeski gravity
AU - Hajian, K.
AU - Liberati, S.
AU - Sheikh-Jabbari, M. M.
AU - Vahidinia, M. H.
N1 - Funding Information: We are grateful to Gary Gibbons, Harvey Reall and Bayram Tekin for comments. KH and MMShJ thank the hospitality of ICTP HECAP where this research carried out. MMShJ acknowledges the support by INSF junior research chair in black hole physics, grant No 950124 and Saramadan grant No. ISEF/M/98204. KH acknowledges support from TÜBITAK international researchers program 2221. SL acknowledges funding from the Ministry of Education and Scientific Research (MIUR) under the grant PRIN MIUR 2017-MB8AEZ.
PY - 2021/1/10
Y1 - 2021/1/10
N2 - It has been observed that for black holes in certain family of Horndeski gravity theories Wald's entropy formula does not lead to the correct first law for black hole thermodynamics. For this family of Horndeski theories speeds of propagation of gravitons and photons are in general different and gravitons move on an effective metric different than the one seen by photons. We show that the temperature of the black hole should be modified from surface gravity over 2π to include effects of this effective metric. The modified temperature, with the entropy unambiguously computed by the solution phase space method, yields the correct first law. Our results have far reaching implications for the Hawking radiation and species problem, going beyond the Horndeski theories.
AB - It has been observed that for black holes in certain family of Horndeski gravity theories Wald's entropy formula does not lead to the correct first law for black hole thermodynamics. For this family of Horndeski theories speeds of propagation of gravitons and photons are in general different and gravitons move on an effective metric different than the one seen by photons. We show that the temperature of the black hole should be modified from surface gravity over 2π to include effects of this effective metric. The modified temperature, with the entropy unambiguously computed by the solution phase space method, yields the correct first law. Our results have far reaching implications for the Hawking radiation and species problem, going beyond the Horndeski theories.
KW - Black hole thermodynamics
KW - Hawking radiation
KW - Horndeski gravity
KW - Wald entropy
UR - http://www.scopus.com/inward/record.url?scp=85097889650&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2005.12985
DO - 10.48550/arXiv.2005.12985
M3 - Article
AN - SCOPUS:85097889650
VL - 812
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
M1 - 136002
ER -