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

TL;DR

This paper investigates whether the ejection of the corona is a common phenomenon in microquasars during outbursts, analyzing multi-wavelength data to understand the relationship between accretion processes and jet ejections.

Contribution

The study proposes a scenario linking corona ejection to soft X-ray peaks and demonstrates this behavior in multiple microquasars using combined X-ray and radio observations.

Findings

Corona ejection coincides with soft X-ray peaks in some microquasars.

Ejected material appears to be the corona itself, disappearing during X-ray maxima.

Similar behavior observed across different sources suggests a general phenomenon.

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.