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SUMMARY:The tail effect as a window on the self-force problem and the prop
 agation of scalar and electromagnetic waves in curved spacetime. - Klaount
 ia Pasmatsiou (Case Western Reserve University)
DTSTART:20210219T130000Z
DTEND:20210219T140000Z
UID:TALK155725@talks.cam.ac.uk
CONTACT:Chandrima Ganguly
DESCRIPTION:Scalar\, electromagnetic and linear gravitational radiation do
  not solely propagate on the null cone in 3+1 dimensions in curved spaceti
 mes\, contrary to their well-known behavior in flat spacetime. Their addit
 ional propagation inside the null cone is known as the tail effect. In the
  first part of the talk\, I will present new results for the tail-induced 
 electromagnetic and gravitational self-force for a test particle in orbit 
 around a central body. This test particle will produce a signal whose tail
  will interact with its future worldline\, thus producing a tail-induced s
 elf-force. I will show that the self force can serve as a probe of the int
 ernal structure of the central object\, with possible future implications 
 for neutron star-black hole mergers. During the second part of the talk\, 
 I will present new results on the propagation of the ” tail radiation”
  resulting from inhomogeneities in curved spacetime. If observable\, tail 
 radiation has the potential to become a new window in the universe and my 
 interest is its application on astrophysical systems\, hence offering comp
 lementary information beyond the usual lensing studies in GR.
LOCATION:Zoom
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