Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..77..257t&link_type=abstract
Astrophysics and Space Science, vol. 77, no. 1, June 1981, p. 257-265.
Astronomy and Astrophysics
Astrophysics
14
Bursts, Neutron Stars, Nuclear Fusion, Stellar Envelopes, Stellar Mass Accretion, X Ray Sources, Abundance, Helium, Hydrogen, Metals, Nuclear Astrophysics, Steady State, Stellar Models, Supernovae, Thermal Stability, X Ray Spectra
Scientific paper
The properties of the hydrogen burning shell in the envelope of an accreting neutron star are studied for a range of mass accretion rates, neutron star radii, and metal abundances of the accreted matter. It is found that hydrogen burning shells lie at densities between 10 to the 5th and 6 x 10 to the 6th g/cu cm. For mass accretion rates greater than the second critical mass accretion rate, hydrogen and helium burn together. For intermediate accretion rates, that is, rates between the first and second critical mass accretion rates, the hydrogen burning shell is found to be stabilized by the beta limited CNO cycle. The implications of these results for X-ray burst phenomena are briefly discussed.
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