Carbon stars in the X-Shooter Spectral Library
Entity
UAM. Departamento de Física TeóricaPublisher
EDP SciencesDate
2015-12-20Citation
10.1051/0004-6361/201526292
Astronomy and Astrophysics 589 (2015): A36
ISSN
1432-0746 (online); 0004-6361 (print)DOI
10.1051/0004-6361/201526292Funded by
B.A. acknowledges the support from the project STARKEY funded by the ERC Consolidator Grant, G.A. n. 615604. A.V. acknowledge support from grant AYA2013-48226-C3-1-P from the Spanish Ministry of Economy and Competitiveness (MINECO)Project
Gobierno de España. AYA2013-48226-C3-1-P; info:eu-repo/grantAgreement/EC/FP7/615604Editor's Version
http://dx.doi.org/10.1051/0004-6361/201526292Subjects
Infrared: stars; Stars: AGB and post-AGB; Stars: carbon; Ultraviolet: stars; FísicaNote
Astronomy and Astrophysics 589 (2015): A36 reproduced with permission from Astronomy & AstrophysicsRights
© ESO 2016Abstract
We provide a new collection of spectra of 35 carbon stars obtained with the ESO/VLT X-Shooter instrument as part of the X-Shooter Spectral Library project. The spectra extend from 0.3 μm to 2.4 μm with a resolving power above ~8000. The sample contains stars with a broad range of (J - K) color and pulsation properties located in the Milky Way and the Magellanic Clouds. We show that the distribution of spectral properties of carbon stars at a given (J - K) color becomes bimodal (in our sample) when (J - K) is larger than about 1.5. We describe the two families of spectra that emerge, characterized by the presence or absence of the absorption feature at 1.53 μm, generally associated with HCN and C2H2. This feature appears essentially only in large-amplitude variables, though not in all observations. Associated spectral signatures that we interpret as the result of veiling by circumstellar matter, indicate that the 1.53 μm feature might point to episodes of dust production in carbon-rich Miras
Files in this item
Google Scholar:Gonneau, A.
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Lançon, A.
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Trager, S.C.
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Aringer, B.
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Lyubenova, M.
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Nowotny, Walter
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Peletier, R.F.
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Prugniel, P.
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Chen, Y.-P.
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Dries, M.
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Choudhury, O.S.
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Falcón-Barroso, J.
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Koleva, M.
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Meneses-Goytia, S.
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Sánchez-Blázquez, Patricia
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Vazdekis, A.
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