Reference : The Gaia-ESO Survey: revisiting the Li-rich giant problem
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/205393
The Gaia-ESO Survey: revisiting the Li-rich giant problem
English
Casey, A. R. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Ruchti, G. [Lund Observatory, Department of Astronomy and Theoretical Physics, Box 43, SE-221 00 Lund, Sweden]
Masseron, T. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Randich, S. [INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Florence, Italy]
Gilmore, G. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Lind, K. [Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany; Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden]
Kennedy, G. M. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Koposov, S. E. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Hourihane, A. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Franciosini, E. [INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Florence, Italy]
Lewis, J. R. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Magrini, L. [INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Florence, Italy]
Morbidelli, L. [INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Florence, Italy]
Sacco, G. G. [INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Florence, Italy]
Worley, C. C. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Feltzing, S. [Lund Observatory, Department of Astronomy and Theoretical Physics, Box 43, SE-221 00 Lund, Sweden]
Jeffries, R. D. [Astrophysics Group, Keele University, Keele, Staffordshire ST5 5BG, UK]
Vallenari, A. [INAF - Padova Observatory, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy]
Bensby, T. [Lund Observatory, Department of Astronomy and Theoretical Physics, Box 43, SE-221 00 Lund, Sweden]
Bragaglia, A. [INAF - Osservatorio Astronomico di Bologna, via Ranzani 1, I-40127 Bologna, Italy]
Flaccomio, E. [INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, I-90134 Palermo, Italy]
François, Pauline [> > > >]
Korn, A. J. [Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden]
Lanzafame, A. [Dipartimento di Fisica e Astronomia, Sezione Astrofisica, Universitá di Catania, via S. Sofia 78, I-95123 Catania, Italy]
Pancino, E. [INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Florence, Italy; ASI Science Data Center, Via del Politecnico SNC, I-00133 Roma, Italy]
Recio-Blanco, A. [Laboratoire Lagrange (UMR7293), Université de Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur, CS 34229, F-06304 Nice cedex 4, France]
Smiljanic, R. [Department for Astrophysics, Nicolaus Copernicus Astronomical Center, ul. Rabiańska 8, PL-87-100 Toruń, Poland]
Carraro, G. [European Southern Observatory, Alonso de Cordova 3107 Vitacura, Santiago de Chile, Chile]
Costado, M. T. [Instituto de Astrofísica de Andalucía-CSIC, Apdo. 3004, E-18080 Granada, Spain]
Damiani, F. [INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, I-90134 Palermo, Italy]
Donati, P. [INAF - Osservatorio Astronomico di Bologna, via Ranzani 1, I-40127 Bologna, Italy; Dipartimento di Fisica e Astronomia, Università di Bologna, viale Berti Pichat 6/2, I-40127 Bologna, Italy]
Frasca, A. [INAF - Osservatorio Astrofisico di Catania, via S. Sofia 78, I-95123 Catania, Italy]
Jofré, P. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]
Lardo, C. [Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF, UK]
de Laverny, P. [Laboratoire Lagrange (UMR7293), Université de Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur, CS 34229, F-06304 Nice cedex 4, France]
Monaco, L. [Departamento de Ciencias Fisicas, Universidad Andres Bello, Republica 220, Santiago, Chile]
Prisinzano, L. [INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, I-90134 Palermo, Italy]
Sbordone, L. [Millennium Institute of Astrophysics, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile; Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile]
Sousa, S. G. [Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal]
Tautvaišienė, G. [Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, LT-01108 Vilnius, Lithuania]
Zaggia, S. [INAF - Padova Observatory, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy]
Zwitter, T. [Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia]
Delgado Mena, E. [Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal]
Chorniy, Y. [Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, LT-01108 Vilnius, Lithuania]
Martell, S. L. [School of Physics, University of New South Wales, Sydney, NSW 2052, Australia]
Silva Aguirre, V. [Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark]
Miglio, A. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK]
Chiappini, C. [Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany]
Montalban, J. [Department of Physics and Astronomy G. Galilei, University of Padova, Vicolo dell'Osservatorio 3, I-35122 Padova, Italy]
Morel, Thierry mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Valentini, M. [Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany)]
1-Sep-2016
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
461
3336-3352
Yes (verified by ORBi)
International
0035-8711
1365-2966
Oxford
United Kingdom
[en] stars: abundances
[en] The discovery of lithium-rich giants contradicts expectations from canonical stellar evolution. Here we report on the serendipitous discovery of 20 Li-rich giants observed during the Gaia-ESO Survey, which includes the first nine Li-rich giant stars known towards the CoRoT fields. Most of our Li-rich giants have near-solar metallicities and stellar parameters consistent with being before the luminosity bump. This is difficult to reconcile with deep mixing models proposed to explain lithium enrichment, because these models can only operate at later evolutionary stages: at or past the luminosity bump. In an effort to shed light on the Li-rich phenomenon, we highlight recent evidence of the tidal destruction of close-in hot Jupiters at the sub-giant phase. We note that when coupled with models of planet accretion, the observed destruction of hot Jupiters actually predicts the existence of Li-rich giant stars, and suggests that Li-rich stars should be found early on the giant branch and occur more frequently with increasing metallicity. A comprehensive review of all known Li-rich giant stars reveals that this scenario is consistent with the data. However, more evolved or metal-poor stars are less likely to host close-in giant planets, implying that their Li-rich origin requires an alternative explanation, likely related to mixing scenarios rather than external phenomena.
http://hdl.handle.net/2268/205393
10.1093/mnras/stw1512
http://adsabs.harvard.edu/abs/2016MNRAS.461.3336C

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