Polar kicks and the spin period - Eccentricity relation in double neutron stars

B. Willems*, J. Andrews, V. Kalogera, K. Belczynski

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

We present results of a population synthesis study aimed at examining the role of spin-kick alignment in producing a correlation between the spin period of the first-born neutron star and the orbital eccentricity of observed double neutron star binaries in the Galactic disk. We find spin-kick alignment to be compatible with the observed correlation, but not to alleviate the requirements for low kick velocities suggested in previous population synthesis studies. Our results furthermore suggest low- and high-eccentricity systems may form through two distinct formation channels distinguished by the presence or absence of a stable mass transfer phase before the formation of the second neutron star. The presence of highly eccentric systems in the observed sample of double neutron stars may furthermore support the notion that neutron stars accrete matter when moving through the envelope of a giant companion.

Original languageEnglish (US)
Title of host publication40 Years Of Pulsars
Subtitle of host publicationMillisecond Pulsars, Magnetars and More
Pages464-468
Number of pages5
DOIs
StatePublished - 2008
Event40 Years Of Pulsars: Millisecond Pulsars, Magnetars and More - Montreal, QC, Canada
Duration: Aug 12 2007Aug 17 2007

Publication series

NameAIP Conference Proceedings
Volume983
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other40 Years Of Pulsars: Millisecond Pulsars, Magnetars and More
CountryCanada
CityMontreal, QC
Period8/12/078/17/07

Keywords

  • Stars: Binaries: Close
  • Stars: Neutron
  • Stars: Pulsars: General
  • Stars: Supemovae: General

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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