The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4

A. Frebel; W. Aoki; N. Christlieb; H. Ando; M. Asplund; P. S. Barklem; T. C. Beers; K. Eriksson; C. Fechner; M. Y. Fujimoto; S. Honda; T. Kajino; T. Minezaki; K. Nomoto; J. E. Norris; S. G. Ryan; M. Takada-Hidai; S. Tsangarides; Y. Yoshii

doi:10.1017/S1743921305005569

The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4

A. Frebel
, W. Aoki
, N. Christlieb
, H. Ando
, M. Asplund
, P. S. Barklem
, T. C. Beers
, K. Eriksson
, C. Fechner
, M. Y. Fujimoto
, S. Honda
, T. Kajino
, T. Minezaki
, K. Nomoto
, J. E. Norris
, S. G. Ryan
, M. Takada-Hidai
, S. Tsangarides
, Y. Yoshii

Australian National University
National Astronomical Observatory of Japan
University of Hamburg
Uppsala University
Michigan State University
Hokkaido University
The University of Tokyo
Open University Milton Keynes
Tokai University

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We describe the discovery of HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4. The star was found in a sample of bright metal-poor stars selected from the Hamburg/ESO survey. Its abundance pattern is characterized by very high C and N abundances. The detection of Sr which is overabundant by a factor of 10 as compared to iron and the Sun, suggests that neutron-capture elements had already been produced in the very early Galaxy. A puzzling Li depletion is observed in this unevolved star which contradicts the value of the primordial Li derived from WMAP and other Li studies. Possible scenarios for the origin of the abundance pattern (Pop. II or Pop. III) are presented as well as an outlook on future observations.

Original language	English
Pages (from-to)	207-212
Number of pages	6
Journal	Proceedings of the International Astronomical Union
Volume	1
Issue number	S228
DOIs	https://doi.org/10.1017/S1743921305005569
State	Published - 2005
Externally published	Yes

Keywords

Stars: abundances
Stars: individual (HE 1327-2326)

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10.1017/S1743921305005569

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Frebel, A., Aoki, W., Christlieb, N., Ando, H., Asplund, M., Barklem, P. S., Beers, T. C., Eriksson, K., Fechner, C., Fujimoto, M. Y., Honda, S., Kajino, T., Minezaki, T., Nomoto, K., Norris, J. E., Ryan, S. G., Takada-Hidai, M., Tsangarides, S., & Yoshii, Y. (2005). The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4. Proceedings of the International Astronomical Union, 1(S228), 207-212. https://doi.org/10.1017/S1743921305005569

@article{89fca5d66f474cff97500d6c9789cb5c,

title = "The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4",

abstract = "We describe the discovery of HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4. The star was found in a sample of bright metal-poor stars selected from the Hamburg/ESO survey. Its abundance pattern is characterized by very high C and N abundances. The detection of Sr which is overabundant by a factor of 10 as compared to iron and the Sun, suggests that neutron-capture elements had already been produced in the very early Galaxy. A puzzling Li depletion is observed in this unevolved star which contradicts the value of the primordial Li derived from WMAP and other Li studies. Possible scenarios for the origin of the abundance pattern (Pop. II or Pop. III) are presented as well as an outlook on future observations.",

keywords = "Stars: abundances, Stars: individual (HE 1327-2326)",

author = "A. Frebel and W. Aoki and N. Christlieb and H. Ando and M. Asplund and Barklem, \{P. S.\} and Beers, \{T. C.\} and K. Eriksson and C. Fechner and Fujimoto, \{M. Y.\} and S. Honda and T. Kajino and T. Minezaki and K. Nomoto and Norris, \{J. E.\} and Ryan, \{S. G.\} and M. Takada-Hidai and S. Tsangarides and Y. Yoshii",

year = "2005",

doi = "10.1017/S1743921305005569",

language = "英语",

volume = "1",

pages = "207--212",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

number = "S228",

}

Frebel, A, Aoki, W, Christlieb, N, Ando, H, Asplund, M, Barklem, PS, Beers, TC, Eriksson, K, Fechner, C, Fujimoto, MY, Honda, S, Kajino, T, Minezaki, T, Nomoto, K, Norris, JE, Ryan, SG, Takada-Hidai, M, Tsangarides, S & Yoshii, Y 2005, 'The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4', Proceedings of the International Astronomical Union, vol. 1, no. S228, pp. 207-212. https://doi.org/10.1017/S1743921305005569

TY - JOUR

T1 - The new record holder for the most iron-poor star

T2 - HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4

AU - Frebel, A.

AU - Aoki, W.

AU - Christlieb, N.

AU - Ando, H.

AU - Asplund, M.

AU - Barklem, P. S.

AU - Beers, T. C.

AU - Eriksson, K.

AU - Fechner, C.

AU - Fujimoto, M. Y.

AU - Honda, S.

AU - Kajino, T.

AU - Minezaki, T.

AU - Nomoto, K.

AU - Norris, J. E.

AU - Ryan, S. G.

AU - Takada-Hidai, M.

AU - Tsangarides, S.

AU - Yoshii, Y.

PY - 2005

Y1 - 2005

N2 - We describe the discovery of HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4. The star was found in a sample of bright metal-poor stars selected from the Hamburg/ESO survey. Its abundance pattern is characterized by very high C and N abundances. The detection of Sr which is overabundant by a factor of 10 as compared to iron and the Sun, suggests that neutron-capture elements had already been produced in the very early Galaxy. A puzzling Li depletion is observed in this unevolved star which contradicts the value of the primordial Li derived from WMAP and other Li studies. Possible scenarios for the origin of the abundance pattern (Pop. II or Pop. III) are presented as well as an outlook on future observations.

AB - We describe the discovery of HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4. The star was found in a sample of bright metal-poor stars selected from the Hamburg/ESO survey. Its abundance pattern is characterized by very high C and N abundances. The detection of Sr which is overabundant by a factor of 10 as compared to iron and the Sun, suggests that neutron-capture elements had already been produced in the very early Galaxy. A puzzling Li depletion is observed in this unevolved star which contradicts the value of the primordial Li derived from WMAP and other Li studies. Possible scenarios for the origin of the abundance pattern (Pop. II or Pop. III) are presented as well as an outlook on future observations.

KW - Stars: abundances

KW - Stars: individual (HE 1327-2326)

UR - https://www.scopus.com/pages/publications/63549140913

U2 - 10.1017/S1743921305005569

DO - 10.1017/S1743921305005569

M3 - 文章

AN - SCOPUS:63549140913

SN - 1743-9213

VL - 1

SP - 207

EP - 212

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S228

ER -

The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H] = -5.4

Abstract

Keywords

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