R-I data comparisons for the Hyades and merged VRI data for M67

Details R-I data comparisons for the Hyades and merged VRI data for M67 R-I data comparisons for the Hyades and merged VRI data for M67

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96..211t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, July 1988, p. 211-217.

Statistics

Computation

15

Computational Astrophysics, Globular Clusters, Infrared Spectra, Open Clusters, Stellar Evolution, Stellar Spectrophotometry, Cluster Analysis, Error Analysis, Least Squares Method, Radio Spectra, Variable Stars

Scientific paper

The authors compare their cluster (R-I) data (see 153.004) to measurements from other sources. For the Hyades, they find no case in which other data definitely agree with their own in both scale and zero point. For M67, affairs are better, and the authors can compile a merged (R-I) and (V-R) catalog for the evolved stars. These analyses yield one instance of disagreement between sets of Eggen R-I data, and two more in which such data disagree with measurements by others. A fourth example of this kind exists for the Hyades, and a fifth example exists for field stars. The combined evidence suggests that there have been recurring systematics in Eggen's (R-I) measurements.

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