Contents
Images
Upload your image
DSS Images Other Images
Related articles
The main sequence of the globular cluster NGC 6752
UBV photoelectric and photographic photometry of the southern globularcluster NGC 6752 are presented. The photoelectric sequence is extendedto a point about 1 mag below the main-sequence turnoff. A clustercolor-magnitude diagram, uncorrected for reddening, is plotted whichshows that: (1) the RR Lyrae gap is unpopulated except for oneshort-period W Vir star that lies above the horizontal branch; (2) thehorizontal-branch stars apparently lie mostly to the blue of theinstability strip; (3) the slope of the giant branch is about 5.0,implying an intermediate metal deficiency; (4) the main-sequence turnoffoccurs at V = 17.30 + or - 0.05 and B-V = 0.425 + or - 0.010; (5) themain sequence appears to be very broad, probably as a result of errorsin the photographic photometry; and (6) the normalized UV excess of themain-sequence stars is 0.22 mag, indicative of a metallicity (Fe/H) ofabout -1.5.
|
Submit a new article
Related links
Submit a new link
Member of following groups:
|
Observation and Astrometry data
| Constellation: | Paon |
| Right ascension: | 19h10m11.20s |
| Declination: | -59°32'54.2" |
| Apparent magnitude: | 8.231 |
| Distance: | 331.126 parsecs |
| Proper motion RA: | 3.6 |
| Proper motion Dec: | 0 |
| B-T magnitude: | 10.317 |
| V-T magnitude: | 8.404 |
Catalogs and designations:
|
