The Very Young Open Cluster NGC 6383.

Details The Very Young Open Cluster NGC 6383. The Very Young Open Cluster NGC 6383.

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982phdt........40m&link_type=abstract

Thesis (PH.D.)--UNIVERSITY OF WATERLOO (CANADA), 1982.Source: Dissertation Abstracts International, Volume: 43-09, Section: B, p

Physics

Scientific paper

Spectroscopic, radial velocity, photoelectric and photographic data for the very young open cluster NGC 6383 have been obtained. The cluster has a colour excess of E(,(B-V)) = 0('m)31 (+OR-) 0('m)02 and a distance modulus of V - M(,v) = 11('m)9 (+OR-) 0('m)25. A group of bright yellow giants, like that in NGC 2264, is found not to belong to the cluster. The oldest cluster stars (pre-main sequence and turn-off) are about 30 million years old. The youngest ones are in the order of 1 to 1.6 million years old. It is suggested that the central binary system's (O7V + O7V) radiation pressure terminated the star formation process in the area; the central binary itself has an age of 2.8 (+OR-) 0.5 million years. Spectroscopic and radial velocity data for NGC 3324 have been obtained. The two bright giants are found to be non-members as in NGC 6383. The cluster age (turn -off) is 2.2 to 22 million years. A supergiant (A1Ia('+)) is found to be a probable member.

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