Mass loss rate and atmospheric turbulence of the B2 hypergiant HD 80077

Details Mass loss rate and atmospheric turbulence of the B2 hypergiant HD 80077 Mass loss rate and atmospheric turbulence of the B2 hypergiant HD 80077

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...216..143c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 216, no. 1-2, June 1989, p. 143-147.

Astronomy and Astrophysics

Astrophysics

22

Atmospheric Turbulence, B Stars, Stellar Atmospheres, Stellar Mass Ejection, Supergiant Stars, H Alpha Line, Photosphere, Stellar Evolution, Stellar Gravitation, Stellar Spectrophotometry

Scientific paper

Turbulence in the atmosphere of HD 80077, situated on the Humphreys-Davidson limit, has been studied in order to test whether turbulence plays a role in the instability of very hot stars. A mass loss rate of (5 +10 or -3) x 10 to the -6th solar masses/yr is obtained which is very low for stars along the upper luminosity limit in the Hertzsprung-Russell diagram. The object has a photospheric microturbulent velocity component of 23 + or - 2 km/s and an outwardly directed turbulent acceleration of 11-24 cm/sq s.

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