Other
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103..916f&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, March 1992, p. 916-923. Research supported by NSERC.
Other
22
Charge Coupled Devices, Open Clusters, Stellar Spectrophotometry, Ubv Spectra, Wolf-Rayet Stars, Color-Magnitude Diagram, Eclipsing Binary Stars, Molecular Clouds, Star Formation
Scientific paper
New UBV photometry and CCD spectroscopy of stars near Berkeley 86 are used to examine the possible cluster membership of the WN5 + O6 eclipsing binary system V444 Cygni. The color-magnitude diagram, star counts, reddening, and cluster age all suggest that the system is a probable member of this young (5 +/- 1 Myr), moderately reddened (E(B - V) = 0.8 - 1.2) open cluster. The assumption of cluster membership results in an estimate of (30-40) solar masses for the initial mass of the WR progenitor. The relationship of Be 86 to the surrounding Cyg OB1 association is also studied, and a working model is proposed in which several young clusters and other markers of relatively recent star formation lie at the edges of a molecular/dust cloud about 1-1.5 kpc from the sun.
Dawson Peter C.
de Robertis Michael M.
English D.
Forbes Duncan
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