The probability distribution of binary pulsar coalescence rates. II. Neutron star-white dwarf binaries

Chunglee Kim*, Vassiliki Kalogera, Duncan R. Lorimer, Tiffany White

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

We consider the statistics of pulsar binaries with white dwarf companions (NS-WD). Using the statistical analysis method developed by Kim and coworkers, we calculate the Galactic coalescence rate of NS-WD binaries due to gravitational wave emission. We find that the most likely values for the total Galactic coalescence rate (Rtot) of NS-WD binaries lie in the range 0.2-10 Myr-1, depending on different assumed pulsar population models. For our reference model, we obtain Rtot = 4.1 -2.56+2.25 Myr-1 at a 68% statistical confidence level. These rate estimates are not corrected for pulsar beaming, and as such they are found to be about a factor of 20 smaller than the Galactic coalescence rate estimates for double neutron star systems. Based on our rate estimates, we calculate the gravitational wave background due to coalescing NS-WD binaries out to extragalactic distances within the frequency band of the Laser Interferometer Space Antenna. We find the contribution from NS-WD binaries to the gravitational wave background to be negligibly.

Original languageEnglish (US)
Pages (from-to)1109-1117
Number of pages9
JournalAstrophysical Journal
Volume616
Issue number2 I
DOIs
StatePublished - Dec 1 2004

Keywords

  • Binaries: close
  • Gravitational waves
  • Stars: neutron
  • White dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'The probability distribution of binary pulsar coalescence rates. II. Neutron star-white dwarf binaries'. Together they form a unique fingerprint.

Cite this