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; Sean G. Ryan; M. Takada-Hidai; S. Tsangarides; Y. Yoshii

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, Sean G. Ryan, M. Takada-Hidai, S. Tsangarides, Y. Yoshii

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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
Journal	Proceedings of the International Astronomical Union
Volume	228
Publication status	Published - 2005

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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, 228, 207-212.

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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.",

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

year = "2005",

language = "English",

volume = "228",

pages = "207--212",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

}

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. 228, pp. 207-212.

TY - JOUR

T1 - The new record holder for the most iron-poor star: 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, Sean 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.

M3 - Article

SN - 1743-9213

VL - 228

SP - 207

EP - 212

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

ER -

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

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