Estimates of black hole natal kick velocities from observations of low-mass X-ray binaries

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The birth kicks of black holes, arising from asymmetric mass ejection or neutrino emission during core-collapse supernovae, are of great interest for both observationally constraining supernova models and population-synthesis studies of binary evolution. Recently, several efforts were undertaken to estimate black hole birth kicks from observations of black hole low-mass X-ray binaries. We follow up on this work, specifically focusing on the highest estimated black hole kick velocities. We find that existing observations do not require black hole birth kicks in excess of approximately 80 km s-1, although higher kicks are not ruled out.

Original languageEnglish
Pages (from-to)578-581
Number of pages4
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Publication statusPublished - 1 Jan 2016
Externally publishedYes


  • Binaries: close
  • Galaxy: kinematics and dynamics
  • Stars: black holes
  • X-rays: binaries

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