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

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

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.
• Public URL: https://durham-repository.worktribe.com/output/1557496