VBLUW photometry of the association SCO OB1 (containing the open cluster NGC 6231) - A discussion on the evolutionary status of the hypergiant Zeta(1) SCO (B1Ia+)

Details VBLUW photometry of the association SCO OB1 (containing the open cluster NGC 6231) - A discussion on the evolutionary status of the hypergiant Zeta(1) SCO (B1Ia+) VBLUW photometry of the association SCO OB1 (containing the open cluster NGC 6231) - A discussion on the evolutionary status of the hypergiant Zeta(1) SCO (B1Ia+)

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26as...58..537v&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 58, Dec. 1984, p. 537-548.

Astronomy and Astrophysics

Astrophysics

36

Astronomical Photometry, Open Clusters, Stellar Evolution, Supergiant Stars, Distance, Hertzsprung-Russell Diagram, Interstellar Extinction

Scientific paper

Attention is given to VBLUW photometry obtained for nearly 190 stars in Sco OB1, of which almost 60 appear to be foreground objects. Temperature, surface gravity, and individual reddenings have been obtained. It appears that the reddening is not uniformly distributed across the association. Virtually all reddening is due to dust in the local spiral arm, up to a distance of almost 700 pc from the sun. A kinematical age of about one million years, as determined by Braes (1967), is in reasonable agreement with the average evolutionary age of about 3.6 + or - 0.6 years for the 12 brightest stars.

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