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Red horizontal-branch stars in the galactic disk
A quantitative, three-dimensional spectral classification systemdeveloped by Rose (1984), which uses 2.5-A resolution spectra in theblue, has been used to identify a class of red horizontal branch (RHB)stars in the Galactic disk that are similar to those in the 'metal rich'globular cluster M 71. The RHB are denoted as evolved stars by their SrII 4077 line, and are distinguished from post-main sequence starsevolving through the same region of the HR diagram on the basis of theunique appearance of their CN 3883 and 4216 A bands. The RHB starsconsitute at least 5 percent of the entire giant branch population ofthe disk.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Anka |
| Sað Açýklýk: | 02h14m38.93s |
| Yükselim: | -44°33'40.4" |
| Görünürdeki Parlaklýk: | 8.932 |
| Uzaklýk: | 137.931 parsek |
| özdevim Sað Açýklýk: | 71.8 |
| özdevim Yükselim: | 43.8 |
| B-T magnitude: | 9.411 |
| V-T magnitude: | 8.972 |
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