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High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466. / Pereira, C.B.; Drake, N.A.

In: Astronomy and Astrophysics, Vol. 496, No. 3, 2009, p. 791-804.

Research output: Contribution to journal › Article

Harvard

Pereira, CB & Drake, NA 2009, 'High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466', Astronomy and Astrophysics, vol. 496, no. 3, pp. 791-804. <http://adsabs.harvard.edu/abs/2009A%26A...496..791P>

APA

Pereira, C. B., & Drake, N. A. (2009). High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466. Astronomy and Astrophysics, 496(3), 791-804. http://adsabs.harvard.edu/abs/2009A%26A...496..791P

Vancouver

Pereira CB, Drake NA. High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466. Astronomy and Astrophysics. 2009;496(3):791-804.

Author

Pereira, C.B. ; Drake, N.A. / High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466. In: Astronomy and Astrophysics. 2009 ; Vol. 496, No. 3. pp. 791-804.

BibTeX

@article{aa814df33c124c978f382ab1f49b5550,
title = "High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466",
abstract = "Aims: We determined the atmospheric parameters and abundance pattern of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466 in order to better understand their evolutionary state and the nature of the s-element enhancement of these stars. Methods: We used high resolution optical spectroscopy. Atmospheric parameters and abundances were determined in the local-thermodynamic-equilibrium model atmospheres of Kurucz using the spectral analysis code MOOG. Results: We conclude that HD 10613 is another metal-poor barium star with C/O = 0.52 and [Fe/H] = -0.82, while BD+04°2466 is a CH star with C/O = 3.6 and [Fe/H] = -1.92 rather than a metal-deficient barium star as it was previously classified. BD+04°2466 appears to be enriched in lead with [Pb/Ce] = +0.85 and [Pb/La] = +0.72. For BD+04°2466 the abundance of lead is in agreement with predictions from AGB models. Due to the low luminosity of these two stars, their observed s-process overabundance is better explained by mass-transfer in the past from an",
author = "C.B. Pereira and N.A. Drake",
year = "2009",
language = "English",
volume = "496",
pages = "791--804",
journal = "ASTRONOMY & ASTROPHYSICS",
issn = "0004-6361",
publisher = "EDP Sciences",
number = "3",

}

RIS

TY - JOUR

T1 - High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466

AU - Pereira, C.B.

AU - Drake, N.A.

PY - 2009

Y1 - 2009

N2 - Aims: We determined the atmospheric parameters and abundance pattern of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466 in order to better understand their evolutionary state and the nature of the s-element enhancement of these stars. Methods: We used high resolution optical spectroscopy. Atmospheric parameters and abundances were determined in the local-thermodynamic-equilibrium model atmospheres of Kurucz using the spectral analysis code MOOG. Results: We conclude that HD 10613 is another metal-poor barium star with C/O = 0.52 and [Fe/H] = -0.82, while BD+04°2466 is a CH star with C/O = 3.6 and [Fe/H] = -1.92 rather than a metal-deficient barium star as it was previously classified. BD+04°2466 appears to be enriched in lead with [Pb/Ce] = +0.85 and [Pb/La] = +0.72. For BD+04°2466 the abundance of lead is in agreement with predictions from AGB models. Due to the low luminosity of these two stars, their observed s-process overabundance is better explained by mass-transfer in the past from an

AB - Aims: We determined the atmospheric parameters and abundance pattern of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466 in order to better understand their evolutionary state and the nature of the s-element enhancement of these stars. Methods: We used high resolution optical spectroscopy. Atmospheric parameters and abundances were determined in the local-thermodynamic-equilibrium model atmospheres of Kurucz using the spectral analysis code MOOG. Results: We conclude that HD 10613 is another metal-poor barium star with C/O = 0.52 and [Fe/H] = -0.82, while BD+04°2466 is a CH star with C/O = 3.6 and [Fe/H] = -1.92 rather than a metal-deficient barium star as it was previously classified. BD+04°2466 appears to be enriched in lead with [Pb/Ce] = +0.85 and [Pb/La] = +0.72. For BD+04°2466 the abundance of lead is in agreement with predictions from AGB models. Due to the low luminosity of these two stars, their observed s-process overabundance is better explained by mass-transfer in the past from an

M3 - Article

VL - 496

SP - 791

EP - 804

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

IS - 3

ER -

ID: 5236256