Late-type members of young stellar kinematic groups - I. Single stars

Citation
D. Montes et al., Late-type members of young stellar kinematic groups - I. Single stars, M NOT R AST, 328(1), 2001, pp. 45-63
Citations number
121
Categorie Soggetti
Space Sciences
Journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN journal
00358711 → ACNP
Volume
328
Issue
1
Year of publication
2001
Pages
45 - 63
Database
ISI
SICI code
0035-8711(20011121)328:1<45:LMOYSK>2.0.ZU;2-8
Abstract
This is the first paper of a series aimed at studying the properties of lat e-type members of young stellar kinematic groups. We concentrate our study on classical young moving groups such as the Local Association (Pleiades mo ving group, 20-150 Myr), IC 2391 supercluster (35 Myr), Ursa Major group (S irius supercluster, 300 Myr), and Hyades supercluster (600 Myr), as well as on recently identified groups such as the Castor moving group (200 Myr). I n this paper we compile a preliminary list of single late-type possible mem bers of some of these young stellar kinematic groups. Stars are selected fr om previously established members of stellar kinematic groups based on phot ometric and kinematic properties as well as from candidates based on other criteria such as their level of chromospheric activity, rotation rate and l ithium abundance. Precise measurements of proper motions and parallaxes tak en from the Hipparcos Catalogue, as well as from the Tycho-2 Catalogue, and published radial velocity measurements are used to calculate the Galactic space motions (U, V W) and to apply Eggen's kinematic criteria in order to determine the membership of the selected stars to the different groups. Add itional criteria using age-dating methods for late-type stars will be appli ed in forthcoming papers of this series. A further study of the list of sta rs compiled here could lead to a better understanding of the chromospheric activity and their age evolution, as well as of the star formation history in the solar neighbourhood. In addition, these stars are also potential sea rch targets for direct imaging detection of substellar companions.