Mathematics – Probability
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975natur.258..308l&link_type=abstract
Nature, vol. 258, Nov. 27, 1975, p. 308, 309.
Mathematics
Probability
3
Binary Stars, Neutron Stars, Planetary Nebulae, X Ray Sources, X Ray Stars, Astronomical Models, Companion Stars, Deposition, Stellar Envelopes, Stellar Evolution
Scientific paper
The possibility is considered of a compact X-ray source in a binary system where the companion star ejects its envelope to become a planetary nebula. The accretion rate and lifetime of such a source are determined analytically in the case where the compact object is a neutron star, and the question is examined of whether a binary system of this type is a likely consequence of stellar evolution. It is shown that the probability of forming such a source is negligible in the case of massive close binaries, slightly greater for low-mass widely separated binaries, and greatest for binary systems containing white dwarfs. Several possible coincidences between X-ray sources and planetary nebulae are identified.
Livio Mario
Shaviv Giora
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