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Spectroscopic studies of selected F-G supergiants
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| Elemental Abundances and Atmospheric Parameters of Seven F-G Supergiants
Spectroscopic abundance determinations for a sample of seven F-G starshave been carried out. The majority of them have large galacticlatitudes. One objective in deriving spectroscopic abundances is todifferentiate evolved objects seen at high galactic latitudes from theyoung population I supergiant stars that happened to have large galacticlatitudes but actually belong to the galactic disk. Secondly, it isimportant to get good calibrators for photometric metallicity indices.It has been suggested in the past that many high galactic latitude F-Gstars that are classified as supergiants are in reality subgiants ordwarfs. Our spectroscopically derived gravities show that two of thestars studied in this paper, HR 5165 and HD 114520, are not supergiantsas classified in Bright Star Catalogue but are subgiants belonging tothe solar neighbourhood. In our sample, HR 3229 and HR 8470 displaysolar abundances and the derived gravities support the bright giantluminosity class ascribed to them. HR 4114, HR 4912 and HR 7671 haveabundances significantly different from those of young supergiants ofgalactic disk. The evolutionary status of these objects is discussed.(SECTION: Stars)
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| Takýmyýldýz: | Ressam |
| Sað Açýklýk: | 06h35m13.99s |
| Yükselim: | -62°30'09.8" |
| Görünürdeki Parlaklýk: | 8.846 |
| Uzaklýk: | 125.471 parsek |
| özdevim Sað Açýklýk: | 2 |
| özdevim Yükselim: | -9.2 |
| B-T magnitude: | 9.978 |
| V-T magnitude: | 8.94 |
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