Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88..104s&link_type=abstract
Astronomical Journal, vol. 88, Jan. 1983, p. 104-108. Research supported by the Research Corp.
Astronomy and Astrophysics
Astronomy
10
Cepheid Variables, H Beta Line, Star Clusters, Stellar Color, Stellar Spectrophotometry, Visual Photometry, Distance, Stellar Magnitude, Ubv Spectra
Scientific paper
Intermediate-band photometry of stars in three Cepheid-containing clusters is presented which was obtained in an attempt to derive precise distances to aid in Cepheid calibration. Stars in the anonymous cluster near CV Mon, Ruprecht 79 and Lynga 6 were observed in standard four-color filters and H-beta with the 1.3- and 2.1-m telescopes at Kitt Peak National Observatory and the 0.9- and 1.5-m telescopes at Cerro Tololo Inter-American Observatory. Distance moduli of 10.9, 11.4, and 10.6 are estimated for CV Mon, Ru 79, and Ly 6, respectively, along with color excesses of 0.562, 0.536, and 0.963. The results are in generally good agreement with previous work, but have a somewhat higher precision.
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