The Groombridge 1830 Group of Halo Stars Based on New Data

Details The Groombridge 1830 Group of Halo Stars Based on New Data The Groombridge 1830 Group of Halo Stars Based on New Data

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010vsgh.conf..141g&link_type=abstract

Variable Stars, the Galactic halo and Galaxy Formation, Proceedings of an international conference held in Zvenigorod, Russia, 1

Astronomy and Astrophysics

Astronomy

Scientific paper

Parameters of 7 members of the Groombridge 1830 group are specified using the Hipparcos astrometry and the radial velocities from the OSACA catalog. 13 new group members are added. The space velocity V_{Gmb}=296 km/s and the coordinates of radiant (L_{Gmb}, B_{Gmb})=(317°, 3°) of the group, which are found from 20 stars with the new data, slightly differ from the previous results. The color-luminosity array and metallicity confirm that the group members belong to the halo.

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