The luminosity of the B2 hypergiant HD 80077

Details The luminosity of the B2 hypergiant HD 80077 The luminosity of the B2 hypergiant HD 80077

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...248..475c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 248, no. 2, Aug. 1991, p. 475-480.

Astronomy and Astrophysics

Astrophysics

12

B Stars, Stellar Luminosity, Supergiant Stars, Spectral Line Width, Stellar Atmospheres, Stellar Mass Ejection, Stellar Spectra

Scientific paper

The extremely bright and relatively stable hypergiant HD 80077 is an enigmatic object. Since the star is assumed to have a luminosity of 2 x 10 exp 6, considerable variability and a large mass loss rate would be expected. However, its mass loss rate of (5 +10/-3) x 10 exp -6 solar mass/yr and its variability are very low with respect to its luminosity. The star is assumed to be a member of the cluster Pismis 11, and therefore to have a known distance. The above-mentioned luminosity has been derived using the apparent visual magnitude, the bolometric correction and the distance to Pismis 11. Indications that the star is not a member of Pismis 11, but a foreground star, therefore having a lower luminosity have been looked for. For this, no evidence has been found.

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