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SUMMARY:Kerr-CFT and gravitational perturbations. - Jorge Santos\, DAMTP
DTSTART:20100129T130000Z
DTEND:20100129T140000Z
UID:TALK21871@talks.cam.ac.uk
CONTACT:David Kubiznak
DESCRIPTION:Motivated by the Kerr-CFT conjecture\, we investigate perturba
 tions of the near-horizon extreme Kerr spacetime. The Teukolsky equation f
 or a massless field of arbitrary spin is solved. Solutions fall into two c
 lasses: normal modes and travelling waves. Imposing suitable (outgoing) bo
 undary conditions\, we find that there are no unstable modes. The explicit
  form of metric perturbations is obtained using the Hertz potential formal
 ism\, and compared with the Kerr-CFT boundary conditions. The energy and a
 ngular momentum associated with scalar field and gravitational normal mode
 s are calculated. The energy is positive in all cases. The behaviour of se
 cond order perturbations is discussed.
LOCATION:Pavilion B Potter Room (B1.19)
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