Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...275..732f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 275, Dec. 15, 1983, p. 732-736. Research supported by the Natural Sciences
Astronomy and Astrophysics
Astrophysics
49
Cepheid Variables, Open Clusters, Stellar Luminosity, Calibrating, Least Squares Method, Maximum Likelihood Estimates
Scientific paper
It is pointed out that the calibration of classical Cepheid absolute magnitudes remains a problem of intense interest. The most direct approach to this calibration involves Cepheids which are located in open clusters and stellar associations. However, studies related to the calibration of these Cepheids are more or less inconsistent in their use of such fundamental parameters as the distance modulus of the Hyades or the calibration of the age-zero main sequence. The present investigation has the objective to collect these disparate studies into one data base which is internally consistent. It was decided to adjust previously determined cluster moduli to a uniform Hyades modulus and to rediscuss the reddening of each cluster Cepheid.
Fernie Donald J.
McGonegal R.
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