Scl-1013644: A CEMP-s star in the Sculptor dwarf spheroidal galaxy

C. Salgado; G. S. Da Costa; D. Yong; J. E. Norris

doi:10.1093/mnras/stw1986

Scl-1013644: A CEMP-s star in the Sculptor dwarf spheroidal galaxy

C. Salgado^*, G. S. Da Costa, D. Yong, J. E. Norris

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

Recent studies of theMilkyWay and its satellites have paid special attention to the importance of carbon-enhanced metal-poor (CEMP) stars due to their involvement in Galactic formation history and their possible connection with the chemical elements originating in the first stellar generation. In an ongoing study of red giants in the Sculptor dwarf galaxy, we have discovered a star with extremely strong CN and CH molecular bands. This star, Scl-1013644, has previously been identified by Geisler et al. as a star with an enrichment in the heavy elements. Spectrum synthesis has been used to derive the carbon, nitrogen and barium abundances for Scl-1013644. Our findings are [C/Fe]=+0.8, [N/Fe]=-0.3 and [Ba/Fe]=+2.1 with the latter result consistent with the value found by Geisler et al. These results reveal Scl-1013644 as a CEMP-s star, the third such star discovered in this dwarf galaxy.

Original language	English
Pages (from-to)	598-603
Number of pages	6
Journal	Monthly Notices of the Royal Astronomical Society
Volume	463
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stw1986
Publication status	Published - 21 Nov 2016

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title = "Scl-1013644: A CEMP-s star in the Sculptor dwarf spheroidal galaxy",

abstract = "Recent studies of theMilkyWay and its satellites have paid special attention to the importance of carbon-enhanced metal-poor (CEMP) stars due to their involvement in Galactic formation history and their possible connection with the chemical elements originating in the first stellar generation. In an ongoing study of red giants in the Sculptor dwarf galaxy, we have discovered a star with extremely strong CN and CH molecular bands. This star, Scl-1013644, has previously been identified by Geisler et al. as a star with an enrichment in the heavy elements. Spectrum synthesis has been used to derive the carbon, nitrogen and barium abundances for Scl-1013644. Our findings are [C/Fe]=+0.8, [N/Fe]=-0.3 and [Ba/Fe]=+2.1 with the latter result consistent with the value found by Geisler et al. These results reveal Scl-1013644 as a CEMP-s star, the third such star discovered in this dwarf galaxy.",

keywords = "Galaxies: abundances, Galaxies: dwarf, Galaxies: individual: (Sculptor dwarf spheroidal), Galaxy: abundances",

author = "C. Salgado and {Da Costa}, {G. S.} and D. Yong and Norris, {J. E.}",

note = "Publisher Copyright: {\textcopyright} 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2016",

month = nov,

day = "21",

doi = "10.1093/mnras/stw1986",

language = "English",

volume = "463",

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journal = "Monthly Notices of the Royal Astronomical Society",

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T1 - Scl-1013644

T2 - A CEMP-s star in the Sculptor dwarf spheroidal galaxy

AU - Salgado, C.

AU - Da Costa, G. S.

AU - Yong, D.

AU - Norris, J. E.

PY - 2016/11/21

Y1 - 2016/11/21

N2 - Recent studies of theMilkyWay and its satellites have paid special attention to the importance of carbon-enhanced metal-poor (CEMP) stars due to their involvement in Galactic formation history and their possible connection with the chemical elements originating in the first stellar generation. In an ongoing study of red giants in the Sculptor dwarf galaxy, we have discovered a star with extremely strong CN and CH molecular bands. This star, Scl-1013644, has previously been identified by Geisler et al. as a star with an enrichment in the heavy elements. Spectrum synthesis has been used to derive the carbon, nitrogen and barium abundances for Scl-1013644. Our findings are [C/Fe]=+0.8, [N/Fe]=-0.3 and [Ba/Fe]=+2.1 with the latter result consistent with the value found by Geisler et al. These results reveal Scl-1013644 as a CEMP-s star, the third such star discovered in this dwarf galaxy.

AB - Recent studies of theMilkyWay and its satellites have paid special attention to the importance of carbon-enhanced metal-poor (CEMP) stars due to their involvement in Galactic formation history and their possible connection with the chemical elements originating in the first stellar generation. In an ongoing study of red giants in the Sculptor dwarf galaxy, we have discovered a star with extremely strong CN and CH molecular bands. This star, Scl-1013644, has previously been identified by Geisler et al. as a star with an enrichment in the heavy elements. Spectrum synthesis has been used to derive the carbon, nitrogen and barium abundances for Scl-1013644. Our findings are [C/Fe]=+0.8, [N/Fe]=-0.3 and [Ba/Fe]=+2.1 with the latter result consistent with the value found by Geisler et al. These results reveal Scl-1013644 as a CEMP-s star, the third such star discovered in this dwarf galaxy.

KW - Galaxies: abundances

KW - Galaxies: dwarf

KW - Galaxies: individual: (Sculptor dwarf spheroidal)

KW - Galaxy: abundances

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U2 - 10.1093/mnras/stw1986

DO - 10.1093/mnras/stw1986

M3 - Article

SN - 0035-8711

VL - 463

SP - 598

EP - 603

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

Scl-1013644: A CEMP-s star in the Sculptor dwarf spheroidal galaxy

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