Universidad Complutense de Madrid
E-Prints Complutense

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

Impacto

Downloads

Downloads per month over past year

Montes Gutiérrez, David and López Santiago, Javier and Gálvez, M. C. and Fernández Figueroa, María José and Castro Rubio, Elisa de and Cornide Castro-Piñeiro, Manuel (2001) Late-type members of young stellar kinematic groups - I. Single stars. Monthly notices of the Royal Astronomical Society, 328 (1). pp. 45-63. ISSN 0035-8711

[img]
Preview
PDF
739kB

Official URL: http://dx.doi.org/10.1046/j.1365-8711.2001.04781.x




Abstract

This is the first paper of a series aimed at studying the properties of late-type members of young stellar kinematic groups. We concentrate our study on classical young moving groups such as the Local Association (Pleiades moving group, 20-150 Myr), IC 2391 supercluster (35 Myr), Ursa Major group (Sirius supercluster, 300 Myr), and Hyades supercluster (600 Myr), as well as on recently identified groups such as the Castor moving group (200 Myr). In this paper we compile a preliminary list of single late-type possible members of some of these young stellar kinematic groups. Stars are selected from previously established members of stellar kinematic groups based on photometric and kinematic properties as well as from candidates based on other criteria such as their level of chromospheric activity, rotation rate and lithium abundance. Precise measurements of proper motions and parallaxes taken 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. Additional criteria using age-dating methods for late-type stars will be applied in forthcoming papers of this series. A further study of the list of stars 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 search targets for direct imaging detection of substellar companions.


Item Type:Article
Additional Information:

© 2001 RAS. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. This research has made use the of the SIMBAD data base, operated at CDS, Strasbourg, France, and the ARI Database for Nearby Stars, Astronomisches Rechen-Institut, Heidelberg. We thank Dr D. Barrado y Navascués for providing us with some additional candidates to our initial sample of late-type stars. We also thank the anonymous referee for suggesting several improvements and helpful comments. This work was supported by the Universidad Complutense de Madrid and the Spanish Dirección General de Enseñanza Superior e Investigación Científica (DGESIC) under grant PB97-0259.

Uncontrolled Keywords:Solar-type stars; Brown dwarf companion; T-tauri stars; Sky survey catalog; Ursa-major group; Chromospherically active stars; Main-sequence stars; Low-mass stars; X-ray images; F type stars
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:30941
Deposited On:17 Jun 2015 14:31
Last Modified:10 Dec 2018 15:05

Origin of downloads

Repository Staff Only: item control page