Mergers of hairy black holes: Constraining topological couplings from entropy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00636679" target="_blank" >RIV/68378271:_____/24:00636679 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0367773" target="_blank" >https://hdl.handle.net/11104/0367773</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.110.064032" target="_blank" >10.1103/PhysRevD.110.064032</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mergers of hairy black holes: Constraining topological couplings from entropy

Popis výsledku v původním jazyce

Hairy black-holes are a unique prediction of certain theories that extend general relativity (GR) with a scalar field. The presence of scalar hair is reflected nontrivially in the entropy of the black hole along with any topological coupling that may be present in the action. Demanding that a system of two merging black holes obeys the global second law of thermodynamics imposes a bound on this topological coupling coefficient. In this work we study how this bound is pushed from its GR value by the presence of scalar hair by considering estimates of binary black-hole merger parameters through inference studies of both mock and real gravitational-wave (GW) events. Although the scalar charge may produce a statistically significant deviation of the change in entropy over the GR prediction, we find no evidence of this happening in the data from real GW events taken from GWTC-1. We also find the entropy change to be susceptible to biases arising out of GW inferences which ends up being two orders of magnitude larger, therefore overwhelming any change, if at all, induced by the scalar hair.

Název v anglickém jazyce

Mergers of hairy black holes: Constraining topological couplings from entropy

Popis výsledku anglicky

Hairy black-holes are a unique prediction of certain theories that extend general relativity (GR) with a scalar field. The presence of scalar hair is reflected nontrivially in the entropy of the black hole along with any topological coupling that may be present in the action. Demanding that a system of two merging black holes obeys the global second law of thermodynamics imposes a bound on this topological coupling coefficient. In this work we study how this bound is pushed from its GR value by the presence of scalar hair by considering estimates of binary black-hole merger parameters through inference studies of both mock and real gravitational-wave (GW) events. Although the scalar charge may produce a statistically significant deviation of the change in entropy over the GR prediction, we find no evidence of this happening in the data from real GW events taken from GWTC-1. We also find the entropy change to be susceptible to biases arising out of GW inferences which ends up being two orders of magnitude larger, therefore overwhelming any change, if at all, induced by the scalar hair.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

110

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

064032

Kód UT WoS článku

001361612900022

EID výsledku v databázi Scopus

2-s2.0-85204154841