Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..655t&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 94, Aug. 1982, p. 655-662. Research supported by the Natural Sciences an
Astronomy and Astrophysics
Astronomy
11
Cepheid Variables, Open Clusters, Supergiant Stars, Ubv Spectra, Companion Stars, Early Stars, Stellar Color, Stellar Winds
Scientific paper
New UBV photometry is presented for stars brighter than V of about 14 lying in the central portion of the open cluster Stock 14. These data help to strengthen the cluster main-sequence fit, and result in a newly-determined cluster distance of 2.78 kpc within 0.12 kpc, and an inferred cluster age of around 4-8 million years. The derived luminosity for the member, Cepheid-like, supergiant variable V810 Cen, which has a characteristic period of about 130 days is equal to -7.9. Its recently-discovered, hot, blue companion is comparable in luminosity to bright, giant, B-type stars lying on the evolved portion of the cluster main sequence, a result which is reasonably consistent with estimates of the star's luminosity inferred from published ultraviolet spectroscopic observations, provided that it has an abnormally strong stellar wind for its luminosity.
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