First results from the use of the relativistic and slim disc model SLIMULX in XSPEC

DOI: 
Publication date: 
01/07/2017
Main author: 
Caballero-Garcia, M. D.
IAA authors: 
Castro-Tirado, A. J.
Authors: 
Caballero-Garcia, M. D.;Bursa, M.;Dovčiak, M.;Fabrika, S.;Castro-Tirado, A. J.;Karas, V.
Journal: 
Contributions of the Astronomical Observatory Skalnate Pleso
Refereed: 
Yes
Publication type: 
Article
Volume: 
47
Pages: 
84-93
Abstract: 

Ultra-Luminous X-ray sources (ULXs) are accreting black holes for which their X-ray properties have been seen to be different to the case of stellar-mass black hole binaries. For most of the cases their intrinsic energy spectra are well described by a cold accretion disc (thermal) plus a curved high-energy emission components. The mass of the black hole (BH) derived from the thermal disc component is usually in the range of 100-1000 solar masses, which have led to the idea that this might represent strong evidence of the Intermediate Mass Black Holes (IMBH), proposed to exist by theoretical studies but with no firm detection (as a class) so far. Recent theoretical and observational developments are leading towards the idea that these sources are instead stellar-mass BHs accreting at an unusual super-Eddington regime. In this paper we briefly describe the model SLIMULX that can be used in XSPEC for the fit of thermal spectra of slim discs around stellar mass BHs in the super-Eddington regime. This model consistently takes all relativistic effects into account. We present the obtained results from the fit of the X-ray spectra from NGC 5408 X—1.

Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85030623457&partnerID=40&md5=540896195f34a15e771e0cdd7238c676
ADS Bibcode: 
2017CoSka..47...84C
Keywords: 
Accretion;accretion-discs;Black hole physics;Relativistic processes;X-rays: general