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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20160518T123000
DTEND;TZID=Atlantic/Canary:20160518T133000
UID:iactalks-929
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/929
CREATED:2016-05-18T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Accretion and outflows in black-hole binaries: The extreme case of 
 V404 Cyg
DESCRIPTION:Accretion and outflows in black-hole binaries: The extreme case
  of V404 Cyg\nDr. Teo Muñoz-Darias\n\nX-ray observations performed during
  the last few decades have provided a  rich data base on accreting black h
 oles and neutron stars in X-ray  binaries. A strong coupling between the p
 roperties of the accretion flow  and the presence of outflows, such as rad
 io-jets and X-ray winds, has  been found to be a fundamental characteristi
 c of black hole systems; a  feature which might be shared by super-massive
  black holes in active  galactic nuclei.  I will present some novel result
 s corresponding to the 2015 outburst of  the prototypical black hole trans
 ient V404 Cyg (Muñoz-Darias et al.  2016, Nature). During this even
 t, arguably the most interesting of its  kind in decades, we have discover
 ed a sustained outer accretion disc  wind, which is simultaneous to the ra
 dio jet.  Our GTC-10.4m spectra  show  that the outflowing wind 
 is neutral, has a large covering factor,  expands at 1% of the speed of li
 ght and triggers a nebular phase once  accretion sharply drops and the eje
 cta become optically thin. I will  discuss the implications of these resul
 ts in the context of black hole  accretion.
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