Access to Astronomical Catalogues

← Click to display the menu
J/PAZh/32/906   Kinematics of Gould Belt Based on Open Clusters  (Bobylev, 2006)

Kinematics of Gould Belt Based on Open Clusters. Bobylev V.V. <Pis'ma Astron. Zh. 32, 906 (2006)> =2006PAZh...32..906B =2006AstL...32..816B
ADC_Keywords: Clusters, open ; Associations, stellar ; Space velocities ; Radial velocities Abstract: We have redetermined kinematic parameters of the Gould Belt using currently available data on the motion of nearby young (logt<7.91) open clusters, OB associations, and moving stellar groups. Our modeling shows that the residual velocities reach their maximum values of -4km/s for rotation (in the direction of Galactic rotation) and +4km/s for expansion at a distance from the kinematic center of 300pc. We have taken the following parameters of the Gould Belt center: R0=150pc and l0=128°. The whole structure is shown to move relative to the local standard of rest at a velocity of 10.7±0.7km/s in the direction l=274±4° and b=-1±3°. Using the derived rotation velocity, we have estimated the virial mass of the Gould Belt to be 1.5 million solar masses. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 73 20 Space velocities of open clusters and OB associations table2.dat 73 29 Space velocities of open clusters. All input data were taken from COCD (J/A+A/438/1163, J/A+A/440/403)
See also: I/280 : All-sky Compiled Catalogue of 2.5 million stars (ASCC-2.5) (Kharchenko, 2001) J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD-1) (Kharchenko+, 2005) J/A+A/440/403 : 109 new Galactic open clusters (COCD-2) (Kharchenko+, 2005) J/AZh/83/821 : Compiled stellar radial velocities catalog (OSACA) (Bobylev+, 2006) Byte-by-byte Description of file: table1.dat table2.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Name Cluster or OB-association designation 14- 16 I3 pc Dist Cluster distance 18- 19 I2 pc e_Dist ? Standar error in Dist (only in table1) 21- 26 F6.2 km/s UVel Velocity component U in Gal. coord. system (1) 28- 32 F5.2 km/s e_UVel Standard error in UVel 34- 39 F6.2 km/s VVel Velocity component V in Gal. coord. system (1) 41- 44 F4.2 km/s e_VVel Standard error in VVel 46- 51 F6.2 km/s WVel Velocity component W in Gal. coord. system (1) 53- 56 F4.2 km/s e_WVel Standard error in WVel 58- 59 I2 --- o_RV Number of stars used for calculation of RV 60 A1 --- n_RV [*] Note on velocity errors (2) 62- 67 F6.2 km/s RV ? Average radial velocity (only in table1) 69- 73 F5.2 km/s e_RV ? Standard error in RV (only in table1)
Note (1): These velocities were corrected for the differential Galactic rotation with Oort constants: A=13.7km/s/kpc and B=-12.9km/s/kpc. Note (2): * marks the four clusters for which the random errors e_RV in one of the velocity component U,V,W exceed 5km/s.

(End) Veta Avedisova (INASAN) 01-Oct-2007
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© Unistra/CNRS