Is the ejection of the corona a general phenomenon in microquasars?

Details Is the ejection of the corona a general phenomenon in microquasars? Is the ejection of the corona a general phenomenon in microquasars?

2008-11-21

arxiv.org/abs/0811.3519v1

PoS Integral08:096,2008

Astronomy and Astrophysics

Astrophysics

10 pages, 7 figures, Proceedings of the 7th INTEGRAL workshop held in Copenhagen 8-11 September 2008

Scientific paper

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.

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