J/PAZh/30/173 Space velocities of solar neighborhood stars (Borkova+, 2004) ================================================================================ Stars of extragalactic origin in the solar neighborhood. Borkova T.V., Marsakov V.A. =2004PAZh...30..173B =2004AstL...30..148B ================================================================================ ADC_Keywords: Stars, dwarfs ; Stars, F-type ; Stars, G-type Abstract: For 77 main-sequence F-G stars in the solar neighborhood with published iron, magnesium, and europium abundances and with the ages we calculated the spatial velocities using Hipparcos data and the galactic orbital elements. A comparison with the orbital elements of the globular clusters that are known to have been accreted by our Galaxy in the past reveals stars of the extragalactic origin. We show that the abundance ratios of r- and {alpha}-elements in all the accreted stars differ sharply from those in the stars that are genetically associated with the Galaxy. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table.dat 81 77 Chemical composition and galactic orbital elements of the nearest field stars -------------------------------------------------------------------------------- See also: V/117 : Geneva-Copenhagen Survey of Solar neighbourhood (Nordstrom+, 2004) Byte-by-byte Description of file: table.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 --- Name HD or BD designation 12- 16 F5.2 Sun [Fe/H] Mean value of [Fe/H] in dex 19- 22 F4.2 Sun [Mg/Fe] Mean value of [Mg/Fe] in dex 25- 29 F5.2 Sun [Eu/Fe] ? Mean value of [Eu/Fe] in dex 32- 37 F6.1 km/s Uvel Radial component of spatial velocity, positive toward galactic anticenter (1) 40- 45 F6.1 km/s Vvel Tangent component of spatial velocity, positive toward galactic rotation (1) 47- 52 F6.1 km/s Wvel Z component of spatial velocity, positive toward north galactic pole (1) 55- 59 F5.1 km/s Vpec Total pecular velocity (1) 62- 65 F4.1 kpc R apogalactic radius (1) 68- 71 F4.1 kpc Zmax Maximum distance from galactic plane 74- 77 F4.2 --- e Eccentricity 80 I1 --- Pop [1/4] Type of galactic population (2) -------------------------------------------------------------------------------- Note (1): Spatial velocity components of the star and their total pecular velocity with respect to the local standard of rest (-10,10,6). Note (2): Type of galactic population coded as follows: 1 = thin disk 2 = thick disk 3 = protodisk halo 4 = accreted halo -------------------------------------------------------------------------------- ================================================================================ (End) Veta Avedisova (INASAN) 15-Oct-2004