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SUMMARY:Powerful winds from hungry black holes - Ciro Pinto
DTSTART:20161123T134500Z
DTEND:20161123T141500Z
UID:TALK67915@talks.cam.ac.uk
CONTACT:Quentin Kral
DESCRIPTION:The detection of "fully-grown" supermassive black holes poweri
 ng active galactic nuclei at high redshift\, when the Universe was young\,
  challenges the theories of black holes growth\, requiring long periods of
  high accretion\, most likely above the Eddington limit. This is a focus o
 f the next generation large missions\, but cannot be done with the current
  instrumentation due to the large distances. Therefore\, we need to study 
 objects accreting at high rates in the nearby Universe. Most ultraluminous
  X-ray sources (ULXs\, luminosities > 3·10^39 erg/s) show X-ray spectra t
 hat are consistent with stellar mass black holes or neutron stars accretin
 g at or above Eddington and provide the best workbench to study super-Eddi
 ngton accretion and fast growth rates. A few\, exceptionally bright\, ULXs
  are good candidates for hosting intermediate mass black holes (e.g. 1000 
 solar masses)\, which are thought to be necessary seeds for the formation 
 of supermassive black holes. In this talk I will discuss some very recent\
 , groundbreaking\, discoveries that shook this research field in support f
 or super-Eddington accretion such as the detection of extremely fast winds
  and pulsations.
LOCATION:Sackler Lecture Theatre\, IoA
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