Bibcode
Tabernero, H. M.; Montes, D.; Gonzalez Hernandez, J. I.
Bibliographical reference
Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held in Madrid, September 13 - 17, 2010, Eds.: M. R. Zapatero Osorio, J. Gorgas, J. Maíz Apellániz, J. R. Pardo, and A. Gil de Paz., p. 551-551
Advertised on:
11
2011
Citations
2
Refereed citations
0
Description
Stellar kinematic groups are kinematically coherent groups of stars that
may share a common origin. These groups spread through the Galaxy over
time due to tidal effects caused by Galactic rotation and disk heating,
however the chemical information survives. The aim of chemical tagging
is to show that abundances of every element in the analysis must be
homogeneus between members. We have studied the case of the Hyades
supercluster in order to compile a reliable list of members (FGK stars)
based on chemical tagging information and spectroscopic age
determinations of this supercluster. This information has been derived
from high-resolution echelle spectra obtained during our surveys of
late-type stars. For a small subsample of the Hyades Supercluster,
stellar atmospheric parameters (Teff, log g, xi, and [Fe/H]) have been
determined using an automatic code which takes into account the
sensibility of iron EWs measured in the spectra. We have derived
absolute abundances that are consistent with Galactic abundance trends
reported in previous studies. 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. A preliminary research has allowed
us to find out which stars are probable members based on their
differential abundances and spectroscopic ages.