Velocity and proper motion of OB associations (Melnik+, 2009)

Details Velocity and proper motion of OB associations (Melnik+, 2009) Velocity and proper motion of OB associations (Melnik+, 2009)

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ycat..74000518m&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/400/518. Originally published in: 2009MNRAS.400..518M

Physics

Clusters: Open, Associations: Stellar, Radial Velocities, Proper Motions

Scientific paper

For every OB-association from the list by Blaha and Humphreys (1989AJ.....98.1598B) we give the mean galactic coordinates l and b, the mean heliocentric distance r, median line-of-sight velocity Vr, the dispersion of line-of-sight velocities dvr, and number of stars with known line-of-sight velocity nvr. The line-of-sight velocities were taken from the catalog by Barbier-Brossat and Figon (1999, Cat. ). We used only the velocities measured with errors of less than 10km/s which corresponds to the quality estimations A, B, and C. We also present median proper motions of OB-associations along l- and b- coordinates, mul and mub. The data obtained for the old reduction (1997, Cat. ) are denoted by the subscript 1, whereas those based on the reduction by van Leewen (2008, Cat. ) are marked by the subscript 2. For each OB association we represent the dispersions of proper motions, dml and dmb, as well as a number of stars nmu with known proper motion. The last column shows the total number of stars with known photometric measurements, Nt, used for determination of the distances for OB-associations. The distances r correspond to the short distance scale for classical Cepheids. They are equal to the distances from the catalog by Blaha and Humphreys (1989AJ.....98.1598B), rBH, multiplied by a factor of 0.8, r=0.8*rBH.
(1 data file).