Estimating the Age of Exoplanet Host Stars: Possible Member of the Hyades Supercluster Confirmed by Chemically Tagging

Montes, David; Tabernero, H. M.; Gonzalez Hernandez, J. I.; Caballero, J. A.
Referencia bibliográfica

Astronomy of Exoplanets with Precise Radial Velocities, held August 16-19, 2010 Penn State University University Park, PA, USA. Online at http://exoplanets.astro.psu.edu/workshop, id.P12

Fecha de publicación:
8
2010
Número de autores
4
Número de autores del IAC
1
Número de citas
1
Número de citas referidas
0
Descripción
During our detailed study of the kinematics of the know exoplanets hots stars (Montes et al. 2010, Caballero et al. 2010) we have identified possible members of the classical moving groups with ages between 10 and 600 Myr (e.g. Local Association, Castor, Ursa Majoris, IC 2391, Hyades). In order to constraint their actual youth and possible membership we are applying age-dating methods for late-type stars, such as lithium abundances, chromospheric and coronal emissions, colour-magnitude diagrams and isochrones. The detailed analysis of the chemical signatures (chemical tagging) is another powerful method that provide clear constrains to the membership to these structures (Tabernero et al. 2010). In this contribution, we focus on the list of exoplanets hots stars possible member of the Hyades Supercluster and report the results obtained from our chemical tagging analysis. Stellar atmospheric parameters (Teff, log g, and [Fe/H]) have been determined using an automatic code which takes into account the sensibility of iron EWs measured in the spectra. The chemical tagging method has been applied with a carefully differential abundance analysis of each candidate member of the Hyades Supercluster, using a well-known member of the Hyades cluster as reference. We identify two exoplanet-host star Hyades cluster known members (ɛ Tau and V833 Tau) and eight Hyades Supercluster candidate members.