Physics
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ssrv...66..215v&link_type=abstract
Space Science Reviews, Volume 66, Issue 1-4, pp. 215-218
Physics
Ag Car, Luminous Blue Variables, Dust Envelope, Stellar Wind
Scientific paper
After many years of permanence at minimum, the luminous blue variable AG Car started in mid 1990 a new brightening phase. We review the spectroscopic variations of the star since 1949, and discuss the nature of the circumstellar nebula. We give evidence that, like in η Car, also in AG Car dust is continuously condensing from the stellar wind. We suggest that the star could be partially reddened by the circumstellar dust, which could affect the estimates of the stellar distance. An extended H II halo is present outside the ring nebula, which should be associated with the wind of a previous cooler evolutionary stage of AG Car.
Baratta Giovanni Battista
Barylak Michael
Cassatella Angelo
Neto Daminelli A.
Polcaro Vito Francesco
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