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HD 7856


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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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观测天体数据

星座:鳳凰座
右阿森松:01h17m20.72s
赤纬:-51°19'31.9"
视星:9.822
右阿森松适当运动:124.9
赤纬适当运动:-4.7
B-T magnitude:10.77
V-T magnitude:9.901

目录:
适当名称
HD 1989HD 7856
TYCHO-2 2000TYC 8039-120-1
USNO-A2.0USNO-A2 0375-00394712
HIPHIP 6020

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