Is the ejection of the corona a general phenomenon in microquasars?
Abstract
We study the evolution of some microquasars during their outbursts as observed with the X-ray telescopes RXTE and INTEGRAL. We focus on the interplay between the accretion disc, and the medium responsible for the production of the hard X-rays (the so-called corona). By comparing the behaviour of two sources (XTE J1550-564 and GRS 1915+105) at X-ray energies and radio wavelengths, we propose a scenario in which the discrete ejections are triggered in coincidence with soft X-ray peaks during the outburst. We also suggest, in those two sources, that the ejected material is the corona that is seen to disappear in coincidence with the X-ray maxima. We then turn to two other sources, XTE J1748-248, and XTE J1859+226, and study whether the same conclusions can be drawn from the existing multi-wave length (radio+X-ray) data.
Cite
@article{arxiv.0811.3519,
title = {Is the ejection of the corona a general phenomenon in microquasars?},
author = {Jerome Rodriguez and Lionel Prat},
journal= {arXiv preprint arXiv:0811.3519},
year = {2010}
}
Comments
10 pages, 7 figures, Proceedings of the 7th INTEGRAL workshop held in Copenhagen 8-11 September 2008