The historical record for Sirius - Evidence for a white-dwarf thermonuclear runaway?

Details The historical record for Sirius - Evidence for a white-dwarf thermonuclear runaway? The historical record for Sirius - Evidence for a white-dwarf thermonuclear runaway?

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.324..235b&link_type=abstract

Nature (ISSN 0028-0836), vol. 324, Nov. 20, 1986, p. 235-237.

Physics

9

Orion Constellation, Stellar Evolution, Stellar Models, White Dwarf Stars, Cyanogen, Ejecta, Iue, Nuclear Fusion, Planetary Nebulae, Red Giant Stars

Scientific paper

Schlosser and Bergmann (1985) presented evidence that in medieval times Sirius was a bright red star, rather than the present bluish-white star, from which they have suggested that Sirius B is a recently born white dwarf. However, their model poses severe evolutionary problems. The authors present the results of their attempts to detect possible planetary nebula ejecta toward Sirius, using data obtained by the International Ultraviolet Explorer (IUE) satellite. Based upon these results and in the light of recent advances in understanding white-dwarf evolution, the authors propose that Sirius B underwent a recent thermonuclear runaway event, triggered by a diffusion-induced CN reaction, to explain the historical behaviour of this star.

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