Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..695s&link_type=abstract
Astronomical Journal, vol. 85, June 1980, p. 695-699.
Astronomy and Astrophysics
Astronomy
21
Galactic Clusters, H Beta Line, Stellar Spectrophotometry, Ubv Spectra, Interstellar Extinction, Open Clusters, Stellar Magnitude
Scientific paper
Four-color and H-beta photometry has been obtained for 22 stars in the field of the open cluster NGC 129. Based on this photometry, the membership of these stars in the cluster is discussed and it is found that many are field stars. The color excesses for cluster members obtained here range from E(b - y) = 0.207 to 0.513 and are larger than those found from previous UBV photometry. It has been suggested that this cluster contains a nonvariable Cepheid strip star. However, the present reddening places this star at the edge of the instability strip. A true distance modulus of 10.93 mag is found for this cluster, which is less than some previous values.
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