ARANCIBIA-SILVA, J.; BOUVIER, J.; BAYO, A.; GALLI, P. A. B.; BRANDNER, W.; BOUY, H.; BARRADO, D.

doi:10.1051/0004-6361/201937137

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ARANCIBIA-SILVA, J.

BOUVIER, J.
Institut de Planétologie et d'Astrophysique de Grenoble [IPAG]

BAYO, A.

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Article de revue

Ce document a été publié dans

Astronomy and Astrophysics - A&A. 2020, vol. 635

EDP Sciences

Résumé en anglais

Context. As a fragile element, lithium is a sensitive probe of physical processes occurring in stellar interiors. Aims: We aim to investigate the relationship between lithium abundance and rotation rate in low-mass members of the newly discovered 125 Myr-old Psc-Eri stellar stream. Methods: We obtained high-resolution optical spectra and measured the equivalent width of the 607.8 nm LiI line for 40 members of the Psc-Eri stream, whose rotational periods have been previously derived. Results: We show that a tight correlation exists between the lithium content and rotation rate among the late-G to early-K-type stars of the Psc-Eri stream. Fast rotators are systematically Li rich, while slow rotators are Li depleted. This trend mimics that previously reported for the similar age Pleiades cluster. Conclusions: The lithium-rotation connection thus seems to be universal over a restricted effective temperature range for low-mass stars at or close to the zero-age main sequence, and does not depend on environmental conditions. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme 103.A-9009.< Réduire

Mots clés en anglais

stars: low-mass

stars: pre-main sequence

stars: abundances

open clusters and associations: individual: Psc-Eri

stars: rotation

Astrophysics - Solar and Stellar Astrophysics

Astrophysics - Astrophysics of Galaxies

DOI

http://dx.doi.org/10.1051/0004-6361/201937137

Project ANR

Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
FUTURE - ANR-16-IDEX-0003

Origine

Importé de hal

Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804