Circular polarizations of gravitational waves from core-collapse supernovae: A clear indication of rapid rotation

Kazuhiro Hayama, Takami Kuroda, Ko Nakamura, Shoichi Yamada

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

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 just prior to collapse. It has been demonstrated by three dimensional simulations that nonaxisymmetric accretion flows may develop spontaneously via hydrodynamical instabilities in the postbounce 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 the Galaxy as long as the rotation period of the core is shorter than a few seconds prior to collapse.

Original languageEnglish
Article number151102
JournalPhysical Review Letters
Volume116
Issue number15
DOIs
Publication statusPublished - 2016 Apr 12

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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