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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.
| UVBY observations of A, F, G and K field stars
Photoelectric data in the uvby system have been obtained for about 800southern stars of the Hipparcos Input Catalog (Grenon, 1982, 1985). Mostof the stars are F and G main sequence and fall in the magnitude range V= 8-11.
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sonraki gruplarýn üyesi:
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Anka |
| Sað Açýklýk: | 23h36m16.27s |
| Yükselim: | -40°30'57.1" |
| Görünürdeki Parlaklýk: | 10.158 |
| özdevim Sað Açýklýk: | 96.7 |
| özdevim Yükselim: | -9.1 |
| B-T magnitude: | 10.828 |
| V-T magnitude: | 10.214 |
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