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Spectral modeling of the three spectral states of the galactic microquasar GRS 1915+105.

Sobolewska, M. A. and Zycki, P. T. (2003) 'Spectral modeling of the three spectral states of the galactic microquasar GRS 1915+105.', Astronomy & astrophysics., 400 (2). pp. 553-558.

Abstract

We have analyzed Rossi X-ray Timing Explorer spectral data of the Galactic micro-quasar GRS 1915+105 in its various spectral states, as defined by Belloni et al. (2000). In states A and B the spectra are dominated by a strong soft thermal component, accompanied by a weak harder tail. The soft component is rather complex and cannot be described as a simple accretion disk emission. Relativistic effects in Kerr metric contribute to the complexity of the soft component but are not sufficient to fully account for it. As found previously, state C spectra are dominated by a Comptonized component, with small contribution from disk photons. The X-ray reprocessed component is highly significant in those spectra and, in contrast to the usual hard state spectra from accreting black holes, it is highly ionized.

Item Type:Article
Keywords:Accretion disks, Individual stars, X-rays, Binaries.
Full text:PDF - Published Version (159Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1051/0004-6361:20030020
Record Created:29 May 2008
Last Modified:05 Aug 2011 16:37

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