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

MPS-Authors

Aguado,  David S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Youakim,  Kris
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

González Hernández,  Jonay I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Allende Prieto,  Carlos
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Starkenburg,  Else
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Martin,  Nicolas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bonifacio,  Piercarlo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Arentsen,  Anke
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Caffau,  Elisabetta
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

de Arriba,  Luis Peralta
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sestito,  Federico
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Garcia-Diaz,  Rafael
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fantin,  Nicholas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hill,  Vanessa
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jablonca,  Pascale
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jahandar,  Farbod
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kielty,  Collin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Longeard,  Nicolas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lucchesi,  Romain
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sánchez-Janssen,  Rubén
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Osorio,  Yeisson
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Palicio,  Pedro A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Tolstoy,  Eline
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wilson,  Thomas G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Côté,  Patrick
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kordopatis,  Georges
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lardo,  Carmela
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Navarro,  Julio F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Thomas,  Guillaume F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Venn,  Kim
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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Citation

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.


Cite as: http://hdl.handle.net/21.11116/0000-0005-D1F4-B
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.