The hydrodynamic origin of neutron star kicks

J. Nordhaus, T. D. Brandt, Adam S. Burrows, A. Almgren

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

We present results from a suite of axisymmetric, core-collapse supernova simulations in which hydrodynamic recoil from an asymmetric explosion produces large protoneutron star (PNS) velocities. We use the adaptive mesh refinement code castro to self-consistently follow core collapse, the formation of the PNS and its subsequent acceleration. We obtain recoil velocities of up to 620 kms -1 at ∼1s after bounce. These velocities are consistent with the observed distribution of pulsar kicks and with PNS velocities obtained in other theoretical calculations. Our PNSs are still accelerating at several hundred kms -1 at the end of our calculations, suggesting that even the highest velocity pulsars may be explained by hydrodynamic recoil in generic, core-collapse supernovae.

Original languageEnglish (US)
Pages (from-to)1805-1812
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume423
Issue number2
DOIs
StatePublished - Jun 2012

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Hydrodynamics
  • Pulsars: general
  • Stars: interiors
  • Stars: neutron
  • Supernovae: general

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