Main sequence of the globular cluster NGC 6752

Journal Article · Sun Apr 01 04:00:00 EST 1979 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/112444· OSTI ID:6470676

Carney, B W

UBV photoelectric and photographic photometry are presented for the globular cluster NGC 6752 (..cap alpha..=19/sup h/ 06/sup m/.4, delta=60/sup 0/ 04'; l=336/sup 0/.5, b=-25/sup 0/.6). The Racine wedge at CTIO was calibrated via field stars, yielding ..delta..m=6/sup m/.86. The photometry was thereby extended below the photoelectric limit at from V=18/sup m/.4 to V=20/sup m/.6, about 3/sup m/.3 below the main sequence turnoff at V=17/sup m/.30 +- 0/sup m/.05 and B-V=0/sup m/.425 +- 0/sup m/.010. The normalized ultraviolet excess of the main sequence stars is delta (U-B)/sub 0.6/approx.0/sup m/.22, which corresponds to (Fe/H)=-1.5. DDO photometry of four red giants suggests (Fe/H)=-1.3; the photometry and image-tube spectrograms imply that star 118 of Cannon and Stobie (Mon. Not. R. Astron. Soc. 162, 227 (1973)) has an unusual composition.

• Research Organization: Harvard--Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
• OSTI ID: 6470676
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 84:4; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHEMICAL COMPOSITION
DATA
DATA FORMS
EXPERIMENTAL DATA
GIANT STARS
INFORMATION
INTERSTELLAR SPACE
ISOLATED VALUES
MAIN SEQUENCE STARS
NUMERICAL DATA
PHOTOMETRY
RED GIANT STARS
SPACE
SPECTROSCOPY
STAR CLUSTERS
STARS