Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..572d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, April 15, 1992, p. 572-580. Research supported by
Astronomy and Astrophysics
Astronomy
25
Conductive Heat Transfer, Massive Stars, Red Giant Stars, Stellar Envelopes, Stellar Evolution, Supergiant Stars, Cavities, Main Sequence Stars, Stellar Coronas, Supernova Remnants, Wolf-Rayet Stars
Scientific paper
The evolution of circumstellar matter around a massive star during the red supergiant phase is investigated. It is shown that, if heat conduction is present, the cavity carved around the star during its main-sequence phase may deflate substantially and even disappear completely in extreme cases. I also find that thermal conduction may cause a shrinking of the cavity already during the main-sequence phase; in this case the bubble tends to settle at a smaller radius. I consider how the evolution of Wolf-Rayet ring nebulae and supernova remnants is affected, and discuss particular astronomical objects such as SN 1987A, the Cygnus Loop, N132D and the WR nebula around HD 197406.
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