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The seven sisters DANCe II. Proper motions and the lithium rotation-activity connection for G and K Pleiades

Barrado y Navascués, D. and Bouy, H. and Bouvier, J. and Moraux, E. and Sarro, L. M. and Bertin, E. and Cuillandre, J.-C. and Stauffer, J. R. and Lillo-Box, J. and Pollock, A. (2016) The seven sisters DANCe II. Proper motions and the lithium rotation-activity connection for G and K Pleiades. Astronomy & Astrophysics, 596 . Art. No. A113. ISSN 0004-6361. http://resolver.caltech.edu/CaltechAUTHORS:20170202-143451804

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Abstract

Context. Stellar clusters open the window to understanding stellar evolution and, in particular, the change with time and the dependence on mass of different stellar properties. As such, stellar clusters act as laboratories where different theories can be tested. Aims. We try to understand the origin of the connection between lithium depletion in F, G, and K stars, rotation and activity in the Pleiades open cluster. Methods. We have collected all the relevant data in the literature, including information regarding rotation period, binarity, and activity, and cross-matched this data with proper motions, multiwavelength photometry, and membership probability from the DANCe database. To avoid biases, we only included single members of the Pleiades with probabilities larger than 75% in the discussion. Results. The analysis confirms that there is a strong link between activity, rotation, and the lithium equivalent width excess, especially for the range Lum(bol) = 0.5–0.2L_⊙ (about K2–K7 spectral types or 0.75–0.95 M_⊙). Conclusions. It is not possible to disentangle these effects, but we cannot exclude that the observed lithium overabundance is partially an observational effect from enhanced activity owing to a large coverage by stellar spots induced by high rotation rates. Since a bona fide lithium enhancement is present in young, fast rotators, both activity and rotation should play a role in the lithium problem.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1051/0004-6361/201629103DOIArticle
http://www.aanda.org/articles/aa/abs/2016/12/aa29103-16/aa29103-16.htmlPublisherArticle
https://arxiv.org/abs/1608.02751arXivDiscussion Paper
ORCID:
AuthorORCID
Stauffer, J. R.0000-0003-3595-7382
Additional Information:© ESO, 2016. Received: 13 June 2016. Accepted: 30 July 2016. This research has been funded by Spanish grant ESP2015-65712-C5-1-R, the French grant ANR-10-JCJC-0501 DESC, and the CNRS PICS project “Comprendre l’origine et les propriétés des étoiles jeunes”. H.B. is funded by the Spanish Ramón y Cajal fellowship program number RYC-2009-04497, whereas J.B. and E.M. acknowledge financial support from the grant ANR 2011 Blanc SIMI5-6 020 01 “Toupies: Towards understanding the spin evolution of stars”. We also acknowledge support from the Faculty of the European Space Astronomy Centre (ESAC). It makes use of VOSA, developed under the Spanish Virtual Observatory project supported from the Spanish MICINN through grant AyA2008-02156, and of the SIMBAD database, operated at CDS, Strasbourg, France. This work is based in part on data obtained as part of the UKIRT Infrared Deep Sky Survey; from the Wide-Field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration; and data from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. We greatly appreciate the comments and suggestions by the anonymous referee.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
Ministerio de Economía y Competitividad (MICINN)ESP2015-65712-C5-1-R
Agence Nationale pour la Recherche (ANR)ANR-10-JCJC-0501 DESC
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Ramόn y Cajal fellowship programRYC-2009-04497
Agence Nationale pour la Recherche (ANR)SIMI5-6 020 01
Faculty of the European Space Astronomy Centre (ESAC)UNSPECIFIED
Ministerio de Economía y Competitividad (MICINN)AyA2008-02156
NASAUNSPECIFIED
NSFUNSPECIFIED
Record Number:CaltechAUTHORS:20170202-143451804
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170202-143451804
Official Citation:The seven sisters DANCe - II. Proper motions and the lithium rotation-activity connection for G and K Pleiades D. Barrado, H. Bouy, J. Bouvier, E. Moraux, L. M. Sarro, E. Bertin, J.-C. Cuillandre, J. R. Stauffer, J. Lillo-Box and A. Pollock A&A, 596 (2016) A113 DOI: http://dx.doi.org/10.1051/0004-6361/201629103
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73991
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:03 Feb 2017 00:36
Last Modified:27 Oct 2017 20:56

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