Thermonuclear flashes in the envelopes of accreting hot neutron stars. II - Mass-accretion rates 10 to the 16th and 10 to the 18th g/sec

Details Thermonuclear flashes in the envelopes of accreting hot neutron stars. II - Mass-accretion rates 10 to the 16th and 10 to the 18th g/sec Thermonuclear flashes in the envelopes of accreting hot neutron stars. II - Mass-accretion rates 10 to the 16th and 10 to the 18th g/sec

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983azh....60.1148k&link_type=abstract

(Astronomicheskii Zhurnal, vol. 60, Nov.-Dec. 1983, p. 1148-1154) Soviet Astronomy (ISSN 0038-5301), vol. 27, Nov.-Dec. 1983, p.

Astronomy and Astrophysics

Astronomy

Hot Stars, Neutron Stars, Stellar Envelopes, Stellar Flares, Stellar Mass Accretion, Thermonuclear Reactions, Chemical Composition, Helium, Hydrogen, Reaction Kinetics, Stellar Models, Temperature Dependence

Scientific paper

The effects of changes in mass-accretion rate (MAR) and initial chemical composition on the dynamics of thermonuclear flashes in hot neutron stars are calculated for model stars with MARs ranging from 10 Pg/s to Eg/s. The results are presented in tables and graphs and discussed in detail. A critical MAR of about 40 Pg/s is identified, below which He layers are formed and above which H-He flashes occur. The fast-fast, fast-slow, and double-type flashes observed in the burster XB 1608-522 by Murakami et al. (1980) using the Hakucho satellite are found to be consistent with a model having a MAR near the critical value. In general, even small changes in the H/He ratio before a flash can lead to pronounced changes in the nature of the flash.

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