Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-12-03
Astronomy Letters, 2010, Vol. 36, No. 1, pp. 27-43
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
23 pages, 9 figures
Scientific paper
10.1134/S1063773710010044
Based on a new version of the Hipparcos catalogue and an updated Geneva-Copenhagen survey of F and G dwarfs, we analyze the space velocity field of about 17000 single stars in the solar neighborhood. The main known clumps, streams, and branches (Pleiades, Hyades, Sirius, Coma Berenices, Hercules, Wolf 630-alpha Ceti, and Arcturus) have been identified using various approaches. The evolution of the space velocity field for F and G dwarfs has been traced as a function of the stellar age. We have managed to confirm the existence of the recently discovered KFR08 stream. We have found 19 Hipparcos stars, candidates for membership in the KFR08 stream, and obtained an isochrone age estimate for the stream, 13 Gyr. The mean stellar ages of the Wolf 630-alpha Ceti and Hercules streams are shown to be comparable, 4--6 Gyr. No significant differences in the metallicities of stars belonging to these streams have been found. This is an argument for the hypothesis that these streams owe their origin to a common mechanism.
Bajkova Anisa T.
Bobylev Vadim V.
Myllari Aleksandr
No associations
LandOfFree
Analysis of Peculiarities of the Stellar Velocity Field in the Solar Neighborhood does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Analysis of Peculiarities of the Stellar Velocity Field in the Solar Neighborhood, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of Peculiarities of the Stellar Velocity Field in the Solar Neighborhood will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-517294