Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...355..277k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 355, May 20, 1990, p. 277-280. Research supported by the Institute of Space
Astronomy and Astrophysics
Astrophysics
30
Light Curve, Novae, Stellar Interiors, Stellar Mass Ejection, White Dwarf Stars, Scorpius Constellation, Stellar Envelopes, Stellar Winds
Scientific paper
Sequences of steady mass loss and static solutions are constructed for the envelopes on a 1.377-solar mass white dwarf as models of the decay phase of novae. The envelopes are assumed to have a uniform chemical composition with X = 0.73, 0.33, 0.11, and 0.05 and Z = 0.02 and 0.03 for hydrogen and heavy elements by weight, respectively. An excellent agreement with the observed light curve is obtained by the hydrogen deficient models of X smaller than 0.33, which is consistent with the observed helium enrichment. The distance to U Sco is obtained, from the comparison between the theoretical and observed visual magnitude, to be 5.2 kpc for the model X = 0.11 and the permitted range is D between the values of 3.3 and 8.6 kpc.
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