Sulphur abundances in metal-poor stars

P. E. Nissen; C. Akerman; M. Asplund; D. Fabbian; M. Pettini

doi:10.1007/978-3-540-75485-5_12

Sulphur abundances in metal-poor stars

P. E. Nissen^*, C. Akerman, M. Asplund, D. Fabbian, M. Pettini

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

We report on sulphur abundances in halo stars as derived from near-IR UVES spectra. The importance of removing telluric lines and residual CCD fringing patterns by using early B-type stars as calibrators is emphasized. Comparison of data from the weak λ8694.6 and the stronger λ9212.9,9237.5 pair of S I lines provides important constraints on non-LTE effects. We do not confirm the high sulphur abundances reported by others for some metal-poor stars; our results instead indicate that sulphur behaves like other typical α-capture elements with a plateau at [S/Fe] ∼ + 0.3 dex in the Galactic halo.

Original language	English
Title of host publication	Precision Spectroscopy in Astrophysics
Subtitle of host publication	Proceedings of the ESO/Lisbon/Aveiro Conference held in Aveiro, Portugal, 11-15 September 2006
Editors	Nuno C. Santos, Luca Pasquini, Martino Romaniello, Alexandre C. M. Correia
Pages	51-54
Number of pages	4
DOIs	https://doi.org/10.1007/978-3-540-75485-5_12
Publication status	Published - 2008

Publication series

Name	ESO Astrophysics Symposia
Volume	2008
ISSN (Print)	1431-2433
ISSN (Electronic)	1611-6143

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10.1007/978-3-540-75485-5_12

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Nissen, P. E., Akerman, C., Asplund, M., Fabbian, D., & Pettini, M. (2008). Sulphur abundances in metal-poor stars. In N. C. Santos, L. Pasquini, M. Romaniello, & A. C. M. Correia (Eds.), Precision Spectroscopy in Astrophysics: Proceedings of the ESO/Lisbon/Aveiro Conference held in Aveiro, Portugal, 11-15 September 2006 (pp. 51-54). (ESO Astrophysics Symposia; Vol. 2008). https://doi.org/10.1007/978-3-540-75485-5_12

@inproceedings{92634728b9dd4853bb750b621ae283f3,

title = "Sulphur abundances in metal-poor stars",

abstract = "We report on sulphur abundances in halo stars as derived from near-IR UVES spectra. The importance of removing telluric lines and residual CCD fringing patterns by using early B-type stars as calibrators is emphasized. Comparison of data from the weak λ8694.6 and the stronger λ9212.9,9237.5 pair of S I lines provides important constraints on non-LTE effects. We do not confirm the high sulphur abundances reported by others for some metal-poor stars; our results instead indicate that sulphur behaves like other typical α-capture elements with a plateau at [S/Fe] ∼ + 0.3 dex in the Galactic halo.",

author = "Nissen, {P. E.} and C. Akerman and M. Asplund and D. Fabbian and M. Pettini",

year = "2008",

doi = "10.1007/978-3-540-75485-5_12",

language = "English",

isbn = "9783540754848",

series = "ESO Astrophysics Symposia",

pages = "51--54",

editor = "Santos, {Nuno C.} and Luca Pasquini and Martino Romaniello and Correia, {Alexandre C. M.}",

booktitle = "Precision Spectroscopy in Astrophysics",

}

Nissen, PE, Akerman, C, Asplund, M, Fabbian, D & Pettini, M 2008, Sulphur abundances in metal-poor stars. in NC Santos, L Pasquini, M Romaniello & ACM Correia (eds), Precision Spectroscopy in Astrophysics: Proceedings of the ESO/Lisbon/Aveiro Conference held in Aveiro, Portugal, 11-15 September 2006. ESO Astrophysics Symposia, vol. 2008, pp. 51-54. https://doi.org/10.1007/978-3-540-75485-5_12

Sulphur abundances in metal-poor stars. / Nissen, P. E.; Akerman, C.; Asplund, M. et al.
Precision Spectroscopy in Astrophysics: Proceedings of the ESO/Lisbon/Aveiro Conference held in Aveiro, Portugal, 11-15 September 2006. ed. / Nuno C. Santos; Luca Pasquini; Martino Romaniello; Alexandre C. M. Correia. 2008. p. 51-54 (ESO Astrophysics Symposia; Vol. 2008).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Sulphur abundances in metal-poor stars

AU - Nissen, P. E.

AU - Akerman, C.

AU - Asplund, M.

AU - Fabbian, D.

AU - Pettini, M.

PY - 2008

Y1 - 2008

N2 - We report on sulphur abundances in halo stars as derived from near-IR UVES spectra. The importance of removing telluric lines and residual CCD fringing patterns by using early B-type stars as calibrators is emphasized. Comparison of data from the weak λ8694.6 and the stronger λ9212.9,9237.5 pair of S I lines provides important constraints on non-LTE effects. We do not confirm the high sulphur abundances reported by others for some metal-poor stars; our results instead indicate that sulphur behaves like other typical α-capture elements with a plateau at [S/Fe] ∼ + 0.3 dex in the Galactic halo.

AB - We report on sulphur abundances in halo stars as derived from near-IR UVES spectra. The importance of removing telluric lines and residual CCD fringing patterns by using early B-type stars as calibrators is emphasized. Comparison of data from the weak λ8694.6 and the stronger λ9212.9,9237.5 pair of S I lines provides important constraints on non-LTE effects. We do not confirm the high sulphur abundances reported by others for some metal-poor stars; our results instead indicate that sulphur behaves like other typical α-capture elements with a plateau at [S/Fe] ∼ + 0.3 dex in the Galactic halo.

UR - http://www.scopus.com/inward/record.url?scp=36448963845&partnerID=8YFLogxK

U2 - 10.1007/978-3-540-75485-5_12

DO - 10.1007/978-3-540-75485-5_12

M3 - Conference contribution

SN - 9783540754848

T3 - ESO Astrophysics Symposia

SP - 51

EP - 54

BT - Precision Spectroscopy in Astrophysics

A2 - Santos, Nuno C.

A2 - Pasquini, Luca

A2 - Romaniello, Martino

A2 - Correia, Alexandre C. M.

ER -

Nissen PE, Akerman C, Asplund M, Fabbian D, Pettini M. Sulphur abundances in metal-poor stars. In Santos NC, Pasquini L, Romaniello M, Correia ACM, editors, Precision Spectroscopy in Astrophysics: Proceedings of the ESO/Lisbon/Aveiro Conference held in Aveiro, Portugal, 11-15 September 2006. 2008. p. 51-54. (ESO Astrophysics Symposia). doi: 10.1007/978-3-540-75485-5_12

Sulphur abundances in metal-poor stars

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