Other
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90..479t&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, March 1985, p. 479-487.
Other
41
Star Clusters, Stellar Evolution, Stellar Spectrophotometry, Data Reduction, Error Analysis, K Stars, Stellar Color, Stellar Luminosity, Stellar Magnitude
Scientific paper
For little-evolved stars in the Hyades, Coma, and M67, Cousins VRI photometry which includes and expands on results published in other systems by Taylor is presented. Observing and reduction procedures and error analysis are discussed in some detail, and evidence is presented that the transformations to the Cousins system are satisfactory and the results are internally consistent. Comparisons with data published by Mendoza yield agreement in R-I and V-R for the Hyades and V-R for M67. Disagreement is found, however, in both color indices for Coma and in R-I for M67, and reasons are suggested for favoring the obtained results in these cases. By comparing Mendoza's M67 K-giant data with those of other observers, it is found that any problem with Mendoza's M67 results is apparently limited to the faintest stars he observed. A suggestion by Schild and Weeks that Mendoza's M67 R magnitudes are about 0.1 mag in error is also tested, and it is found that available evidence does not support this suggestion.
Joner Michael D.
Taylor Benjamin J.
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