Main-sequence CCD photometry of the globular cluster NGC 362

Details Main-sequence CCD photometry of the globular cluster NGC 362 Main-sequence CCD photometry of the globular cluster NGC 362

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...315..469b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 315, April 15, 1987, p. 469-479.

Astronomy and Astrophysics

Astrophysics

47

Binary Stars, Charge Coupled Devices, Globular Clusters, Main Sequence Stars, Stellar Spectrophotometry, Color-Magnitude Diagram, Data Reduction, Helium, Interstellar Extinction, Magellanic Clouds

Scientific paper

Main-sequence photometry of the globular cluster NGC 362 is presented. The intrinsic width of the main sequence is somewhat less than + or - 0.010 mag in B-V, consistent with a very homogeneous chemical composition for the cluster main-sequence stars. There are no blue straggler candidates in the observational fields, and the distribution of stellar colors about the main sequence indicates at most a small fraction of binary systems on the main sequence. The best match to the isochrones of VandenBerg and Bell (1985) is for the case (M/H) = -1.0, a helium mass fraction between 0.26 and 0.30, and an age of approximately 14 Gyr.

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