The globular cluster NGC 6652

Details The globular cluster NGC 6652 The globular cluster NGC 6652

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...286..444o&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 286, no. 2, p. 444-448

Astronomy and Astrophysics

Astrophysics

19

Globular Clusters, Horizontal Branch Stars, Hydrogen, Iron, Metallicity, Astronomical Photometry, Blue Stars, Charge Coupled Devices, Color-Magnitude Diagram, Hertzsprung-Russell Diagram, Red Shift

Scientific paper

We have carried out BVRI and Gunn z CCD photometry for the globular cluster NGC6652 which had no previous color magnitude study. This cluster, which is projected close to the bulge minor axis at approximately 11 deg from the center, has a color magnitude diagram (CMD) morphology suggesting a moderately high metallicity of (Fe/H) approximately -0.9. The Horizontal Branch is red with the possibility of a few members in the RR Lyrae gap. The cluster appears to have several blue stragglers. We derive a reddening of E(B-V) = 0.10 +/- 0.02 and a distance of dsolar = 9.3 Kpc. The turnoff is reached and we obtain DeltaV(TO-HB) = 3.35 +/- 0.16 suggesting that it is slightly younger than the average age of Galactic globular clusters.

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