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SUMMARY:Collisions of axion stars with black holes and neutron stars - Kat
 y Clough (Oxford)
DTSTART:20190301T130000Z
DTEND:20190301T140000Z
UID:TALK118756@talks.cam.ac.uk
CONTACT:Nathan Johnson-McDaniel
DESCRIPTION:Axions are a potential dark matter candidate\, which may conde
 nse and form self gravitating compact objects\, called axion stars.\nIn re
 cent work\, we studied head-on collisions of relativistic axion stars with
  black holes and neutron stars. In the black hole case we find that relati
 vely large scalar clouds are produced by mergers of low compactness axion 
 stars and black holes with intermediate spins\, which provides a dynamical
  mechanism for the formation of long lived scalar hair. For neutron star c
 ollisions we find that in the critical limit of black hole formation\, the
  collision gives rise to a large ejection of baryonic mass from the system
 \, purely due to gravitational effects. This could give rise to electromag
 netic observables in addition to their gravitational wave signatures.
LOCATION:Pavilion B Potter Room (B1.19)
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