CCD photometry of 6 globular clusters (Sarajedini+ 1994)

Details CCD photometry of 6 globular clusters (Sarajedini+ 1994) CCD photometry of 6 globular clusters (Sarajedini+ 1994)

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ycat..20930161s&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/93/161. Originally published in: 1994ApJS...93..161S

Computer Science

Clusters: Globular, Photometry: Ccd

Scientific paper

We present CCD photometry for six metal-rich Galactic globular clusters. The color-magnitude diagrams constructed from these data reach well below the horizontal branch (HB), all of which are predominantly redward of the instability strip. From these diagrams, we have measured the magnitude of the HB, the color of the red giant branch (RGB) at the level of the HB, and the magnitude difference between the HB and the RGB clump. Using these quantities, we are able to study the metallicities and reddenings of these clusters. We also discuss the color distribution of stars on the horizontal branch for these metal-rich systems and compare them with available data for putative field disk red HB stars. There appears to be a dearth of field red HB stars having [Fe/H]~-0.5 and B-V<0.85, which are plentiful in the clusters studied here. (11 data files).

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