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

Sobolewska, M.A.; Zycki, P.T.

doi:10.1051/0004-6361:20030020

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

Sobolewska, M.A.; Zycki, P.T.

Authors

M.A. Sobolewska

P.T. Zycki

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.

Citation

Sobolewska, M., & Zycki, P. (2003). Spectral modeling of the three spectral states of the galactic microquasar GRS 1915+105. Astronomy & Astrophysics, 400(2), 553-558. https://doi.org/10.1051/0004-6361%3A20030020

Journal Article Type	Article
Publication Date	Mar 1, 2003
Deposit Date	May 29, 2008
Publicly Available Date	May 29, 2008
Journal	Astronomy and astrophysics.
Print ISSN	0004-6361
Electronic ISSN	1432-0746
Publisher	EDP Sciences
Peer Reviewed	Peer Reviewed
Volume	400
Issue	2
Pages	553-558
DOI	https://doi.org/10.1051/0004-6361%3A20030020
Keywords	Accretion disks, Individual stars, X-rays, Binaries.