The endpoint of the rp process on accreting neutron stars

Details The endpoint of the rp process on accreting neutron stars The endpoint of the rp process on accreting neutron stars

2001-02-23

arxiv.org/abs/astro-ph/0102418v1

Nucl.Phys.A688:150-153,2001; Phys.Rev.Lett.86:3471-3474,2001

Astronomy and Astrophysics

Astrophysics

6 pages, including 4 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.86.3471

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.

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