Evidence for a relativistic iron line in GRS 1915+105
Astrophysics
2007-05-23 v1
Abstract
We report on the discovery of a relativistic iron K\alpha fluorescent emission line in the BeppoSAX spectrum of the microquasar GRS 1915+105, taken on April 19, 1998, when the line was unusually intense. The feature is broad and skewed, clearly indicating emission from the innermost regions of the accretion disc. The inner emitting orbit is larger than the innermost stable orbit, even in Schwarzschild metric: thus, a non-zero BH spin is not required by these data.
Cite
@article{arxiv.astro-ph/0203185,
title = {Evidence for a relativistic iron line in GRS 1915+105},
author = {A. Martocchia and G. Matt and V. Karas and T. Belloni and M. Feroci},
journal= {arXiv preprint arXiv:astro-ph/0203185},
year = {2007}
}
Comments
7 pages, accepted for publication on A&A