The case for membership of the 67 day Cepheid S Vulpeculae in Vulpecula OB2

Details The case for membership of the 67 day Cepheid S Vulpeculae in Vulpecula OB2 The case for membership of the 67 day Cepheid S Vulpeculae in Vulpecula OB2

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..146t&link_type=abstract

Astrophysical Journal, Part 1, vol. 235, Jan. 1, 1980, p. 146-152. Research supported by the National Research Council and Natu

Astronomy and Astrophysics

Astrophysics

27

Cepheid Variables, Spectrum Analysis, Stellar Spectrophotometry, Ubv Spectra, Distance, Light Curve, Radial Velocity, Stellar Evolution, Stellar Luminosity

Scientific paper

New photometric and spectroscopic observations are presented for likely members of Vul OB2, and a distance estimate of 4.41 plus or minus 0.12 kpc is derived for this association. The 67 day classical Cepheid S Vul is found to be a likely member of Vul OB2 based upon evolutionary status, radial velocity, and derived equivalent B star reddening. The derived luminosity for S Vul is -6.89 plus or minus 0.09 m.e., and it is concluded that S Vul is suitable for use as a calibrating object for the galactic PLC relation.

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