Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..68..525b&link_type=abstract
Astrophysics and Space Science, vol. 68, no. 2, Apr. 1980, p. 525-531.
Astronomy and Astrophysics
Astrophysics
Binary Stars, Pulsars, Stellar Evolution, Stellar Structure, Supernovae, X Ray Sources, Stellar Mass, Supernova Remnants
Scientific paper
On the assumption that, at the moment of the supernova explosion, the presently non-degenerate companion of Her X-1 was a main-sequence star with polytropic index n = 3, it is found that the effects of impact and ablation cannot have removed more than about 10% of its pre-supernova mass. A remnant mass for a neutron star of 1.4 solar mass was adopted. The effects of impact and ablation were calculated in the manner given by Wheeler et al. (1975). Depending on the ejection velocity of the SN shell, it is found that with a pre-SN mass of 2.2 solar masses (i.e., the maximum possible value) for the non-degenerate component, the initial binary period was in the range 2-4 days.
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