The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination

Context. Evidence exists in the 125-Myr Pleiades cluster, and more recently in the 5-Myr NGC 2264 cluster, to show that rotation plays a key role in lithium (Li) depletion processes among low-mass stars. Fast rotators appear to be less Li-depleted than equal-mass slow rotators. Aims. We intend to ex...

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Autores principales:	Messina, S., Lanzafame, A.C., Feiden, G.A., Millward, M., Desidera, S., Buccino, A., Curtis, I., Jofré, E., Kehusmaa, P., Medhi, B.J., Monard, B., Petrucci, R.
Formato:	JOUR
Materias:	Stars: abundances Stars: activity Stars: individual: beta Pictoris association Stars: late-type Stars: rotation Starspots Giant stars Rotation Stars Beta Pictoris Stars: Rotation Stars:late type Lithium
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00046361_v596_n_p_Messina
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00046361_v596_n_p_Messina
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spelling	todo:paper_00046361_v596_n_p_Messina2023-10-03T14:01:04Z The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination Messina, S. Lanzafame, A.C. Feiden, G.A. Millward, M. Desidera, S. Buccino, A. Curtis, I. Jofré, E. Kehusmaa, P. Medhi, B.J. Monard, B. Petrucci, R. Stars: abundances Stars: activity Stars: individual: beta Pictoris association Stars: late-type Stars: rotation Starspots Giant stars Rotation Stars Beta Pictoris Stars: abundances Stars: activity Stars: Rotation Stars:late type Starspots Lithium Context. Evidence exists in the 125-Myr Pleiades cluster, and more recently in the 5-Myr NGC 2264 cluster, to show that rotation plays a key role in lithium (Li) depletion processes among low-mass stars. Fast rotators appear to be less Li-depleted than equal-mass slow rotators. Aims. We intend to explore the existence of a Li depletion-rotation connection among the β Pictoris members at an age of about 24 Myr, and to use this correlation either to confirm or to improve age estimates based on the lithium depletion boundary (LDB) modeling. Methods. We photometrically monitored all the known members of the β Pictoris association with at least one lithium equivalent width (Li EW) measurement from the literature. Results. We measured the rotation periods of 30 members for the first time and retrieved the rotation periods for another 36 members from the literature, building a catalogue of 66 members with a measured rotation period and Li EW. Conclusions. We find that in the 0.3 < M < 0.8M⊙ range, there is a strong correlation between rotation and Li EW. For higher mass stars, no significant correlation is found. For very low-mass stars in the Li depletion onset, at about 0.1 M⊙, there are too few data to infer a significant correlation. The observed Li EWs are compared with those predicted by the Dartmouth stellar evolutionary models that incorporate the effects of magnetic fields. After decorrelating the Li EW from the rotation period, we find that the hot side of the LDB is well fitted by Li EW values that correspond to an age of 25 ± 3 Myr, which is in good agreement with independent estimates from the literature. © ESO, 2016. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v596_n_p_Messina
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Stars: abundances Stars: activity Stars: individual: beta Pictoris association Stars: late-type Stars: rotation Starspots Giant stars Rotation Stars Beta Pictoris Stars: abundances Stars: activity Stars: Rotation Stars:late type Starspots Lithium
spellingShingle	Stars: abundances Stars: activity Stars: individual: beta Pictoris association Stars: late-type Stars: rotation Starspots Giant stars Rotation Stars Beta Pictoris Stars: abundances Stars: activity Stars: Rotation Stars:late type Starspots Lithium Messina, S. Lanzafame, A.C. Feiden, G.A. Millward, M. Desidera, S. Buccino, A. Curtis, I. Jofré, E. Kehusmaa, P. Medhi, B.J. Monard, B. Petrucci, R. The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination
topic_facet	Stars: abundances Stars: activity Stars: individual: beta Pictoris association Stars: late-type Stars: rotation Starspots Giant stars Rotation Stars Beta Pictoris Stars: abundances Stars: activity Stars: Rotation Stars:late type Starspots Lithium
description	Context. Evidence exists in the 125-Myr Pleiades cluster, and more recently in the 5-Myr NGC 2264 cluster, to show that rotation plays a key role in lithium (Li) depletion processes among low-mass stars. Fast rotators appear to be less Li-depleted than equal-mass slow rotators. Aims. We intend to explore the existence of a Li depletion-rotation connection among the β Pictoris members at an age of about 24 Myr, and to use this correlation either to confirm or to improve age estimates based on the lithium depletion boundary (LDB) modeling. Methods. We photometrically monitored all the known members of the β Pictoris association with at least one lithium equivalent width (Li EW) measurement from the literature. Results. We measured the rotation periods of 30 members for the first time and retrieved the rotation periods for another 36 members from the literature, building a catalogue of 66 members with a measured rotation period and Li EW. Conclusions. We find that in the 0.3 < M < 0.8M⊙ range, there is a strong correlation between rotation and Li EW. For higher mass stars, no significant correlation is found. For very low-mass stars in the Li depletion onset, at about 0.1 M⊙, there are too few data to infer a significant correlation. The observed Li EWs are compared with those predicted by the Dartmouth stellar evolutionary models that incorporate the effects of magnetic fields. After decorrelating the Li EW from the rotation period, we find that the hot side of the LDB is well fitted by Li EW values that correspond to an age of 25 ± 3 Myr, which is in good agreement with independent estimates from the literature. © ESO, 2016.
format	JOUR
author	Messina, S. Lanzafame, A.C. Feiden, G.A. Millward, M. Desidera, S. Buccino, A. Curtis, I. Jofré, E. Kehusmaa, P. Medhi, B.J. Monard, B. Petrucci, R.
author_facet	Messina, S. Lanzafame, A.C. Feiden, G.A. Millward, M. Desidera, S. Buccino, A. Curtis, I. Jofré, E. Kehusmaa, P. Medhi, B.J. Monard, B. Petrucci, R.
author_sort	Messina, S.
title	The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination
title_short	The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination
title_full	The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination
title_fullStr	The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination
title_full_unstemmed	The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination
title_sort	rotation-lithium depletion correlation in the β pictoris association and the ldb age determination
url	http://hdl.handle.net/20.500.12110/paper_00046361_v596_n_p_Messina
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The rotation-lithium depletion correlation in the β Pictoris association and the LDB age determination

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