Physical Characteristics of Giant Stars in the Anomalous Globular Cluster NGC 362

Abstract

view Abstract Citations (32) References (45) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Physical Characteristics of Giant Stars in the Anomalous Globular Cluster NGC 362 McClure, Robert D. ; Norris, John Abstract Color indices on the DDO intermediate-band photometric system for giant stars in NGC 362 are found to be similar, in the mean, to those in the bright northern globular cluster MS. We conclude that the anomalous red-horizontal branch of NGC 362 cannot be explained by differences in heavy-element abundance. Small differences of the order of A Y = 0.03 in the helium abundance, or of a billion years in age, as pointed out by Rood, appear to be the most likely explanation. A spread, however, appears to exist in [Fe/H] among the individual stars on the giant branch, and this parameter correlates with a similar spread in CN strengths. Subject headings: abundances, stellar - globular clusters - horizontal-branch stars - late-type stars Publication: The Astrophysical Journal Pub Date: October 1974 DOI: 10.1086/153139 Bibcode: 1974ApJ...193..139M full text sources ADS | data products SIMBAD (6) GCPD (1)