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The GALAH survey : ...
The GALAH survey : A catalogue of carbon-enhanced stars and CEMP candidates
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- Cotar, Klemen (author)
- University of Ljubljana
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- Zwitter, Tomaz (author)
- University of Ljubljana
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- Kos, Janez (author)
- University of Sydney,University of Ljubljana
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- Munari, Ulisse (author)
- INAF - Osservatorio Astronomico di Padova
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- Martell, Sarah L. (author)
- University of New South Wales
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- Asplund, Martin (author)
- Australian National University
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- Bland-Hawthorn, Joss (author)
- University of Sydney
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- Buder, Sven (author)
- Max Planck Institute for Astronomy
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- De Silva, Gayandhi M. (author)
- Macquarie University, Sydney
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- Freeman, Kenneth C. (author)
- Australian National University
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- Sharma, Sanjib (author)
- University of Sydney
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- Anguiano, Borja (author)
- University of Virginia
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- Carollo, Daniela (author)
- National Institute for Astrophysics
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- Horner, Jonathan (author)
- University of Southern Queensland
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- Lewis, Geraint F. (author)
- University of Sydney
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- Nataf, David M. (author)
- Johns Hopkins University
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- Nordlander, Thomas (author)
- Australian National University
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- Stello, Denis (author)
- University of Sydney
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- Ting, Yuan Sen (author)
- Princeton University,Institute for Advanced Study, Princeton,Carnegie Observatories
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- Tinney, Chris (author)
- University of New South Wales
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- Traven, Gregor (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,University of Ljubljana
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- Wittenmyer, Rob A. (author)
- University of Southern Queensland
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(creator_code:org_t)
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- 2018-11-22
- 2019
- English 17 s.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 483:3, s. 3196-3212
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http://dx.doi.org/10...
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http://eprints.usq.e...
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Abstract
Subject headings
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- Swan bands-characteristic molecular absorption features of the C2 molecule-are a spectroscopic signature of carbon-enhanced stars. They can also be used to identify carbonenhanced metal-poor (CEMP) stars. The GALAH (GALactic Archaeology with Hermes) is a magnitude-limited survey of stars producing high-resolution, high-signal-to-noise spectra. We used 627 708 GALAH spectra to search for carbon-enhanced stars with a supervised and unsupervised classification algorithm, relying on the imprint of the Swan bands. We identified 918 carbon-enhanced stars, including 12 already described in the literature. An unbiased selection function of the GALAH survey allows us to perform a population study of carbon-enhanced stars. Most of them are giants, out of which we find 28 CEMP candidates. A large fraction of our carbon-enhanced stars with repeated observations show variation in radial velocity, hinting that there is a large fraction of variables among them. 32 of the detected stars also show strong Lithium enhancement in their spectra.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Catalogues
- Methods: data analysis
- Stars: abundances
- Stars: carbon
Publication and Content Type
- art (subject category)
- ref (subject category)
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To the university's database
- By the author/editor
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Cotar, Klemen
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Zwitter, Tomaz
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Kos, Janez
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Munari, Ulisse
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Martell, Sarah L ...
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Asplund, Martin
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show more...
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Bland-Hawthorn, ...
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Buder, Sven
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De Silva, Gayand ...
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Freeman, Kenneth ...
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Sharma, Sanjib
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Anguiano, Borja
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Carollo, Daniela
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Horner, Jonathan
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Lewis, Geraint F ...
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Nataf, David M.
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Nordlander, Thom ...
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Stello, Denis
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Ting, Yuan Sen
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Tinney, Chris
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Traven, Gregor
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Wittenmyer, Rob ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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Lund University