University of Hertfordshire

From the same journal

From the same journal

By the same authors

End point of the rp process on accreting neutron stars

Research output: Contribution to journalLetter

  • H. Schatz
  • A. Aprahamian
  • L. Bildsten
  • A. Cumming
  • M. Ouellette
  • T. Rauscher
  • Friedrich-Karl Thielemann
  • M. Wiescher
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Original languageEnglish
Number of pages4
Pages (from-to)3471-3474
JournalPhysical Review Letters
Journal publication date16 Apr 2001
Publication statusPublished - 16 Apr 2001


We calculate the rapid proton (rp) capture process of hydrogen burning on the surface of an accreting neutron star with an updated reaction network that extends up to Xe, far beyond previous work. In both steady-state nuclear burning appropriate for rapidly accreting neutron stars (such as the magnetic polar caps of accreting x-ray pulsars) and unstable burning of type I x-ray bursts, we find that the rp process ends in a closed SnSbTe cycle. This prevents the synthesis of elements heavier than Te and has important consequences for x-ray burst profiles, the composition of accreting neutron stars, and potentially galactic nucleosynthesis of light p nuclei.

ID: 1634020