The X-ray Globular Cluster NGC 1851

Details The X-ray Globular Cluster NGC 1851 The X-ray Globular Cluster NGC 1851

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....50..299a&link_type=abstract

Astronomy and Astrophysics, vol. 50, no. 2, July 1976, p. 299-303.

Astronomy and Astrophysics

Astrophysics

15

Globular Clusters, Star Distribution, Stellar Spectrophotometry, Ubv Spectra, X Ray Sources, Color-Magnitude Diagram, Galactic Structure, Giant Stars, Stellar Evolution

Scientific paper

UBV photometry of the Southern Globular Cluster NGC 1851 was carried out, with 19 stars observed photoelectrically, and 156 stars measured photographically. The derived apparent modulus is (m-M)app = 15m.50. The reddening is E(B-V) = 0m.10, and the true distance modulus is (m-M)0 = 15m.20. The main features of the color-magnitude diagram are a well defined horizontal branch abundant in red stars and deficient in blue stars, an asymptotic rich subgiant branch and a moderately populated red giant branch of medium steepness.

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