Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...271..259g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 271, Aug. 1, 1983, p. 259-263. Research supported by the Donaghey Foundatio
Astronomy and Astrophysics
Astrophysics
61
Binary Stars, M Stars, Main Sequence Stars, O Stars, Planetary Nebulae, Stellar Spectrophotometry, Angular Momentum, Dwarf Novae, Light Curve, Orbital Elements, Variable Stars
Scientific paper
The present study is concerned with the discovery that the nucleus of the planetary nebula Abell 41 is a close binary with a period so short that it must become a cataclysmic variable in less than 2 x 10 to the 9th yr. The binary components are the hot primary (which excites the nebula) and a secondary of M-dwarf dimensions. The hemisphere of the secondary which faces the primary is heated to approximately 40,000 K. On a time scale of a few times 10,000 yr, the planetary is expected to dissipate, and the primary star will complete its contraction to white-dwarf dimensions. Then a long interval of inactivity will ensue, but the M dwarf must eventually be brought into contact with its Roche lobe because of loss of energy from the system by gravitational radiation.
Bond Howard E.
Grauer Albert D.
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