Detalles de publicación
PP 017037
Lithium abundance and rotation of seismic solar analogues - Solar and stellar connection from Kepler and Hermes observations
1 Laboratoire AIM, CEA/DRF - CNRS - Univ. Paris Diderot - IRFU/SAp, Centre de Saclay, 91191 Gif-sur-Yvette Cedex, France e-mail: paul.beck@cea.fr
2 Departamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN, Brazil
3 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
4 Instituut voor Sterrenkunde, KU Leuven, B-3001 Leuven, Belgium
5 Space Science Institute, 4750 Walnut street Suite 205, Boulder, CO 80301, USA
6 Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
7 Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
8 High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000, USA
9 Department of Physics, Montana State University, Bozeman, MT 59717-3840, USA
10 Dpto. Astrofísica, Facultad de CC. Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
11 Laboratoire Lagrange, Université de Nice Sophia-Antipolis, UMR 7293, CNRS, Observatoire de la Côte d’Azur, Nice, France
12 Stellar Astrophysics Centre, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark
Context. Lithium abundance A(Li) and surface rotation are good diagnostic tools to probe the internal mixing and angular momentum transfer in stars.
Aims. We explore the relation between surface rotation, A(Li) and age in a sample of seismic solar-analogue stars and we study their possible binary nature.
Methods. We select a sample of 18 solar-analogue stars observed by the NASA Kepler satellite for an in-depth analysis. Their seismic properties and surface rotation rates are well constrained from previous studies. About 53 hours of high-resolution spectroscopy were obtained to derive fundamental parameters from spectroscopy and A(Li). These values were combined and confronted with seismic masses, radii and ages, as well as surface rotation periods measured from Kepler photometry.
Results. Based on radial velocities, we identify and confirm a total of 6 binary star systems. For each star, a signal-to-noise ratio of 80
Aims. We explore the relation between surface rotation, A(Li) and age in a sample of seismic solar-analogue stars and we study their possible binary nature.
Methods. We select a sample of 18 solar-analogue stars observed by the NASA Kepler satellite for an in-depth analysis. Their seismic properties and surface rotation rates are well constrained from previous studies. About 53 hours of high-resolution spectroscopy were obtained to derive fundamental parameters from spectroscopy and A(Li). These values were combined and confronted with seismic masses, radii and ages, as well as surface rotation periods measured from Kepler photometry.
Results. Based on radial velocities, we identify and confirm a total of 6 binary star systems. For each star, a signal-to-noise ratio of 80