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SUMMARY:Superradiant instabilities in astrophysical systems - Helvi Witek 
 (DAMTP)
DTSTART:20130301T130000Z
DTEND:20130301T140000Z
UID:TALK42078@talks.cam.ac.uk
CONTACT:Dr Joan Camps
DESCRIPTION:Black holes are key players in a wide range of fundamental phy
 sics including astrophysics as well as high energy physics. Crucial questi
 ons concern their stability properties with potentially important implicat
 ions for the phase-space of solutions or the understanding of condensates 
 in the vicinity of black holes. Of particular interest is the superradiant
  or "BH-bomb" like instability of Kerr BHs which arises naturally in aympt
 otically anti-de Sitter spacetimes or in the presence of massive fields su
 rrounding the BH.\n\nHere\, we focus on the latter scenario and present ou
 r investigations of massive scalar and vector fields in BH backgrounds. Sp
 ecifically\, we have explored the time evolution of these fields with gene
 ric initial configurations in highly spinning BH environments. We have fou
 nd interesting\, non-trivial evolution patterns and have been able to dedu
 ce the growth rate of the superradiant instability.
LOCATION:Pavilion B Potter Room (B1.19)
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