EM166
Looking for a nova-like shell around the black hole X-ray binary V404Cyg
V404 Cyg is a galactic black hole X-ray binary that in 2015 showed a short but violent outburst, during which it showed different types of outflows, including a cold, dense and non-homogeneous outflow from the inner accretion flow, a steady compact jet and relativistic ejections, and strong winds. Based on our radio observations, we estimated the kinetic feedback associate with the jet activity, and found that a considerably amount of kinetic energy was likely deposited by the jets in the environment close to the source. Hence, we argue that a nova-like shell could have formed around V404 Cyg. Such structure has now likely expanded enough to be observed by the EVN and e-MERLIN on angular scales between tens and hundreds of mas. We propose a deep (24 hours in total, including overheads) observation of the location of V404 Cyg with the EVN+e-MERLIN in C-band, in order to image the possible nova-like shell around V404 Cyg. The detection of such a structure will allow us to put strong constraints to the kinetic energy feedback of this system, and ultimately to understand the matter and energy input-output around an accreting black hole.
Observation pages at the EVN archive:
This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197