Analysis of the kinematic structure of the Cygnus OB1 association

DOI: 
10.1093/mnras/stw2967
Publication date: 
01/03/2017
Main author: 
Costado, M. T.
IAA authors: 
Costado, M. T.;Alfaro, E. J.;González, M.;Sampedro, L.
Authors: 
Costado, M. T.;Alfaro, E. J.;González, M.;Sampedro, L.
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Volume: 
465
Pages: 
3879-3888
Abstract: 

The main objective of this study is the characterization of the velocity field in the Cygnus OB1 association using the radial velocity data currently available in the literature. This association is part of a larger star-forming complex located in the direction of the Cygnus region, but whose main subsystems may be distributed at different distances from the sun. We have collected radial velocity data for more than 300 stars in the area of 5 × 5 deg<SUP>2</SUP> centred on the Cygnus OB1 association. We present the results of a kinematic clustering analysis in the subspace of the phase space formed by angular coordinates and radial velocity using two independent methodologies. We have found evidence of structure in the phase space with the detection of two main groups, corresponding to different radial velocity and distance values, belonging to the association, and associated with two main shells defined by the Hα emission. A third grouping well separated from the other two in velocity appears to occupy the whole region associated with what has been called `common shell'.

Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014873844&doi=10.1093%2fmnras%2fstw2967&partnerID=40&md5=fc2b3091fd429893bfa511d8ead435b4
ADS Bibcode: 
2017MNRAS.465.3879C
Keywords: 
techniques: radial velocities;stars: formation;stars: kinematics and dynamics;open clusters and associations: general;Astrophysics - Astrophysics of Galaxies;Astrophysics - Solar and Stellar Astrophysics