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  The Pristine Survey - VI. The first three years of medium-resolution follow-up spectroscopy of Pristine EMP star candidates

Aguado, D. S., Youakim, K., González Hernández, J. I., Allende Prieto, C., Starkenburg, E., Martin, N., et al. (2019). The Pristine Survey - VI. The first three years of medium-resolution follow-up spectroscopy of Pristine EMP star candidates. Monthly Notices of the Royal Astronomical Society, 2271.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-D1F4-B Version Permalink: http://hdl.handle.net/21.11116/0000-0005-D1F5-A
Genre: Journal Article

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 Creators:
Aguado, David S.1, Author
Youakim, Kris1, Author
González Hernández, Jonay I.1, Author
Allende Prieto, Carlos1, Author
Starkenburg, Else1, Author
Martin, Nicolas1, Author
Bonifacio, Piercarlo1, Author
Arentsen, Anke1, Author
Caffau, Elisabetta1, Author
de Arriba, Luis Peralta1, Author
Sestito, Federico1, Author
Garcia-Diaz, Rafael1, Author
Fantin, Nicholas1, Author
Hill, Vanessa1, Author
Jablonca, Pascale1, Author
Jahandar, Farbod1, Author
Kielty, Collin1, Author
Longeard, Nicolas1, Author
Lucchesi, Romain1, Author
Sánchez-Janssen, Rubén1, Author
Osorio, Yeisson1, AuthorPalicio, Pedro A.1, AuthorTolstoy, Eline1, AuthorWilson, Thomas G.1, AuthorCôté, Patrick1, AuthorKordopatis, Georges1, AuthorLardo, Carmela1, AuthorNavarro, Julio F.1, AuthorThomas, Guillaume F.1, AuthorVenn, Kim1, Author more..
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: stars: abundances Galaxy: evolution Galaxy: formation Local Group dark ages reionization first stars early Universe
 Abstract: We present the results of a 3-year long, medium-resolution spectroscopic campaign aimed at identifying very metal-poor stars from candidates selected with the CaHK, metallicity-sensitive Pristine survey. The catalogue consists of a total of 1007 stars, and includes 146 rediscoveries of metal-poor stars already presented in previous surveys, 707 new very metal-poor stars with [Fe/H] < -2.0, and 95 new extremely metal-poor stars with [Fe/H] < -3.0. We provide a spectroscopic [Fe/H] for every star in the catalogue, and [C/Fe] measurements for a subset of the stars (10% with [Fe/H] < -3 and 24% with -3 < [Fe/H] < -2) for which a carbon determination is possible, contingent mainly on the carbon abundance, effective temperature and S/N of the stellar spectra. We find an average carbon enhancement fraction ([C/Fe] ≥ +0.7) of 41 ± 4% for stars with -3 < [Fe/H] < -2 and 58 ± 14% for stars with [Fe/H] < -3, and report updated success rates for the Pristine survey of 56 % and 23 % to recover stars with [Fe/H] < -2.5 and [Fe/H] < -3, respectively. Finally, we discuss the current status of the survey and its preparation for providing targets to upcoming multi-object spectroscopic surveys such as WEAVE.

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 Dates: 2019
 Publication Status: Published in print
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Title: Monthly Notices of the Royal Astronomical Society
Source Genre: Journal
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 2271 Identifier: -