Ýçindekiler
Görüntüler
Resim Yükleyin
DSS Images Other Images
Ýlgili Makaleler
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.
|
Yeni bir Makale Öner
Ýlgili Baðlantýlar
Yeni Bir Baðlantý Öner
sonraki gruplarýn üyesi:
|
Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Tavus |
| Sað Açýklýk: | 19h10m11.20s |
| Yükselim: | -59°32'54.2" |
| Görünürdeki Parlaklýk: | 8.231 |
| Uzaklýk: | 331.126 parsek |
| özdevim Sað Açýklýk: | 3.6 |
| özdevim Yükselim: | 0 |
| B-T magnitude: | 10.317 |
| V-T magnitude: | 8.404 |
Kataloglar ve belirtme:
|
INHABITED SKY
