Stellar activity as a tracer of moving groups
Abstract
We present the results of a study of the stellar activity in the solar neighborhood using complete kinematics (galactocentric velocities U,V,W) and the chromospheric activity index . We analyzed the average activity level near the centers of known moving groups using a sample of 2529 stars and found that the stars near these associations tend to be more active than field stars. This supports the hypothesis that these structures, or at least a significant part of them, are composed of kinematically bound, young stars. We confirmed our results by using Galaxy Evolution Explorer (GALEX) UV data and kinematics taken from the Geneva-Copenhagen Survey for the stars in the sample. Finally, we present a compiled catalog with kinematics and activities for 2529 stars and a list of potential moving group members selected based on their stellar activity level.
Cite
@article{arxiv.1302.6935,
title = {Stellar activity as a tracer of moving groups},
author = {F. Murgas and J. S. Jenkins and P. Rojo and H. R. A Jones and D. J. Pinfield},
journal= {arXiv preprint arXiv:1302.6935},
year = {2015}
}
Comments
Accepted for publication in A&A