Radiation of angular momentum by neutrinos from merged binary neutron stars

Thomas W. Baumgarte, Stuart L. Shapiro

Research output: Contribution to journalArticlepeer-review


We study neutrino emission from the remnant of an inspiraling binary neutron star following coalescence. The mass of the merged remnant is likely to exceed the stability limit of a cold, rotating neutron star. However, the angular momentum of the remnant may also approach or even exceed the Kerr limit, J/M2 = 1, so that total collapse may not be possible unless some angular momentum is dissipated. We find that neutrino emission is very inefficient in decreasing the angular momentum of these merged objects and may even lead to a small increase in J/M2. We illustrate these findings with a postNewtonian, ellipsoidal model calculation. Simple arguments suggest that the remnant may form a bar mode instability on a timescale similar to or shorter than the neutrino emission timescale, in which case the evolution of the remnant will be dominated by the emission of gravitational waves.

Original languageEnglish (US)
Pages (from-to)431-441
Number of pages11
JournalAstrophysical Journal
Issue number1 PART I
StatePublished - 1998


  • Binaries: close
  • Elementary particles
  • Gravitation
  • Instabilities

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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