Article,
Circular polarizations of gravitational waves from core-collapse supernovae: a clear indication of rapid rotation
Physical Review Letters, (Jun 7, 2016)
DOI: 10.1103/physrevlett.116.151102
Abstract
We propose to employ the circular polarization of gravitational waves emitted
by core-collapse supernovae as an unequivocal indication of rapid rotation deep
in their cores. It has been demonstrated by three dimensional simulations that
non-axisymmetric accretion flows may develop spontaneously via hydrodynamical
instabilities in the post-bounce cores. It is not surprising then that the
gravitational waves emitted by such fluid motions are circularly polarized. We
show in this letter that a network of the second generation detectors of
gravitational waves worldwide may be able to detect such polarizations up to
the opposite side of Galaxy as long as the rotation period is shorter than a
few seconds prior to collapse.
