ISSN:
1572-9672
Keywords:
AG Car
;
Luminous blue variables
;
Dust envelope
;
Stellar wind
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract 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 HII halo is present outside the ring nebula, which should be associated with the wind of a previous cooler evolutionary stage of AG Car.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00771069
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