Bright Metal‐poor Stars from the Hamburg/ESO Survey. I. Selection and Follow‐up Observations from 329 Fields | Zendy

Anna Frebel | Zendy; N. Christlieb | Zendy; John E. Norris | Zendy; Timothy C. Beers | Zendy; M. S. Bessell | Zendy; Jaehon Rhee | Zendy; C. Fechner | Zendy; B. Marsteller | Zendy; Silvia Rossi | Zendy; Christopher Thom | Zendy; L. Wisotzki | Zendy; D. Reimers | Zendy

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Bright Metal‐poor Stars from the Hamburg/ESO Survey. I. Selection and Follow‐up Observations from 329 Fields

Author(s) -

Anna Frebel,

N. Christlieb,

John E. Norris,

Timothy C. Beers,

M. S. Bessell,

Jaehon Rhee,

C. Fechner,

B. Marsteller,

Silvia Rossi,

Christopher Thom,

L. Wisotzki,

D. Reimers

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/508506

Subject(s) - metallicity , physics , stars , astrophysics , spectroscopy , spectral line , metal , saturation (graph theory) , astronomy , chemistry , mathematics , combinatorics , organic chemistry

We present a sample of 1777 bright (91.0) metal-poor ([Fe/H]<-2.0) giants of9% +- 2%, which is lower than previously reported. However, the frequencyraises to similar (>20%) and higher values with increasing distance from theGalactic plane. Although the numbers of stars at low metallicity are fallingrapidly at the lowest metallicities, there is evidence that the fraction ofcarbon-enhanced metal-poor stars is increasing rapidly as a function ofdeclining metallicity. For ~60 objects, high-resolution data have already beenobtained; one of these, HE 1327-2326, is the new record holder for the mostiron-deficient star known.Comment: 29 pages (emulateapj), accepted for publication in Ap

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