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Bright Metal-poor Stars from the Hamburg/ESO Survey. I. Selection and Follow-up Observations from 329 Fields
We present a sample of 1777 bright (91.0) metal-poor([Fe/H]<-2.0) giants of 9%+/-2%, which is lower than previouslyreported. However, the frequency rises to similar (>20%) and highervalues with increasing distance from the Galactic plane. Although thenumbers of stars at low metallicity are falling rapidly at the lowestmetallicities, there is evidence that the fraction of carbon-enhancedmetal-poor stars is increasing rapidly as a function of decliningmetallicity. For ~60 objects, high-resolution data have already beenobtained; one of these, HE 1327-2326, is the new record holder for themost iron-deficient star known.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Kupa |
| Sað Açýklýk: | 11h22m42.70s |
| Yükselim: | -17°18'50.6" |
| Görünürdeki Parlaklýk: | 9.592 |
| özdevim Sað Açýklýk: | 14.7 |
| özdevim Yükselim: | -29.4 |
| B-T magnitude: | 10.176 |
| V-T magnitude: | 9.641 |
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