Quasinormal modes of magnetized black hole

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F19%3AA0000413" target="_blank" >RIV/47813059:19240/19:A0000413 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.084038" target="_blank" >https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.084038</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.100.084038" target="_blank" >10.1103/PhysRevD.100.084038</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quasinormal modes of magnetized black hole

Popis výsledku v původním jazyce

We investigate a charged, massive scalar field around a static, spherically symmetric black hole immersed into an external asymptotically uniform magnetic field B. It is shown that for given multipole number l there are 2l + 1 numbers of modes due to the Zeeman effect appearing by an interaction of the external magnetic and charged scalar fields introducing an effective mass of the scalar field mu_(eff) = square root (mu^2 - mqB) where m is the azimuthal number and q is the charge coupling constant. We calculate threshold value of effective mass in which quasinormal modes are arbitrarily long lived and beyond that value quasinormal modes vanish. In the case of mqB &lt; 0 quasinormal modes are longer lived with larger oscillation frequencies. Whenever, magnetic and massive scalar fields satisfies condition mu^(2)_(eff) &lt; 0, an instability appears, i.e., if qB &gt; 0 or qB &lt; 0 there is an instability for the values of azimuthal number m &gt; mu^2/qB or m &lt; mu^2/qB, respectively.

Název v anglickém jazyce

Quasinormal modes of magnetized black hole

Popis výsledku anglicky

We investigate a charged, massive scalar field around a static, spherically symmetric black hole immersed into an external asymptotically uniform magnetic field B. It is shown that for given multipole number l there are 2l + 1 numbers of modes due to the Zeeman effect appearing by an interaction of the external magnetic and charged scalar fields introducing an effective mass of the scalar field mu_(eff) = square root (mu^2 - mqB) where m is the azimuthal number and q is the charge coupling constant. We calculate threshold value of effective mass in which quasinormal modes are arbitrarily long lived and beyond that value quasinormal modes vanish. In the case of mqB &lt; 0 quasinormal modes are longer lived with larger oscillation frequencies. Whenever, magnetic and massive scalar fields satisfies condition mu^(2)_(eff) &lt; 0, an instability appears, i.e., if qB &gt; 0 or qB &lt; 0 there is an instability for the values of azimuthal number m &gt; mu^2/qB or m &lt; mu^2/qB, respectively.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA19-03950S" target="_blank" >GA19-03950S: Testování silné gravitace prostřednictvím černých děr</a><br>

Návaznosti

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

Rok uplatnění

2019

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

100

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

„084038-1“-„084038-8“

Kód UT WoS článku

000490753000009

EID výsledku v databázi Scopus

2-s2.0-85074339234