Accretion disc evolution in GRO J1655-40 and LMC X-3 with relativistic and non-relativistic disc models

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00575397" target="_blank" >RIV/67985815:_____/23:00575397 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/23:10468660

Výsledek na webu

<a href="https://doi.org/10.1093/mnras/stad2339" target="_blank" >https://doi.org/10.1093/mnras/stad2339</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stad2339" target="_blank" >10.1093/mnras/stad2339</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Accretion disc evolution in GRO J1655-40 and LMC X-3 with relativistic and non-relativistic disc models

Popis výsledku v původním jazyce

Black hole X-ray binaries are ideal environments to study the accretion phenomena in strong gravitational potentials. These systems undergo dramatic accretion state transitions and analysis of the X-ray spectra is used to probe the properties of the accretion disc and its evolution. In this work, we present a systematic investigation of & SIM, 1800 spectra obtained by Rossi X-Ray Timing Explorer Proportional Counter Array observations of GRO J1655-40 and LMC X-3 to explore the nature of the accretion disc via non-relativistic and relativistic disc models describing the thermal emission in black hole X-ray binaries. We demonstrate that the non-relativistic modelling throughout an outburst with the phenomenological multicolour disc model DISKBB yields significantly lower and often unphysical inner disc radii and correspondingly higher (& SIM, 50-60 per cent) disc temperatures compared to its relativistic counterparts KYNBB and KERRBB. We obtained the dimensionless spin parameters of a(*) = 0.774 & PLUSMN, 0.069 and a(*) = 0.752 & PLUSMN, 0.061 for GRO J1655-40 with KERRBB and KYNBB, respectively. We report a spin value of a(*) = 0.098 & PLUSMN, 0.063 for LMC X-3 using the updated black hole mass of 6.98 M-& ODOT. Both measurements are consistent with the previous studies. Using our results, we highlight the importance of self-consistent modelling of the thermal emission, especially when estimating the spin with the continuum-fitting method which assumes the disc terminates at the innermost stable circular orbit at all times.

Název v anglickém jazyce

Accretion disc evolution in GRO J1655-40 and LMC X-3 with relativistic and non-relativistic disc models

Popis výsledku anglicky

Black hole X-ray binaries are ideal environments to study the accretion phenomena in strong gravitational potentials. These systems undergo dramatic accretion state transitions and analysis of the X-ray spectra is used to probe the properties of the accretion disc and its evolution. In this work, we present a systematic investigation of & SIM, 1800 spectra obtained by Rossi X-Ray Timing Explorer Proportional Counter Array observations of GRO J1655-40 and LMC X-3 to explore the nature of the accretion disc via non-relativistic and relativistic disc models describing the thermal emission in black hole X-ray binaries. We demonstrate that the non-relativistic modelling throughout an outburst with the phenomenological multicolour disc model DISKBB yields significantly lower and often unphysical inner disc radii and correspondingly higher (& SIM, 50-60 per cent) disc temperatures compared to its relativistic counterparts KYNBB and KERRBB. We obtained the dimensionless spin parameters of a(*) = 0.774 & PLUSMN, 0.069 and a(*) = 0.752 & PLUSMN, 0.061 for GRO J1655-40 with KERRBB and KYNBB, respectively. We report a spin value of a(*) = 0.098 & PLUSMN, 0.063 for LMC X-3 using the updated black hole mass of 6.98 M-& ODOT. Both measurements are consistent with the previous studies. Using our results, we highlight the importance of self-consistent modelling of the thermal emission, especially when estimating the spin with the continuum-fitting method which assumes the disc terminates at the innermost stable circular orbit at all times.

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/GX21-06825X" target="_blank" >GX21-06825X: Akreující černé díry v nové éře polarizačních rentgenových misí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

525

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

23

Strana od-do

1288-1310

Kód UT WoS článku

001051114800040

EID výsledku v databázi Scopus

2-s2.0-85169907020