Serendipitous Chandra X-ray Spectroscopy of GALEX Nearby Young-Star Survey (GALNYSS) Candidates
Abstract
More than 2000 candidate young (age 10-100 Myr) low-mass stars within ~100 pc of Earth have been identified by the Galex Nearby Young-Star Survey (GALNYSS), via the combination of ultraviolet (Galex) and near-IR (WISE and 2MASS) photometry and kinematic data. Among these candidates, we find more than a dozen objects for which serendipitous archival Chandra X-ray observations are available. The spectral types for these objects, if stellar, range from early- to mid-M. Hence, this serendipitously observed subsample affords the opportunity to study the X-ray emission characteristics of young stars at the low-mass end of the stellar mass spectrum. We present preliminary results of spectral analysis, including estimates of plasma temperature, intervening absorption, and intrinsic X-ray luminosities, for these Chandra X-ray counterparts to GALNYSS candidates. These results will be used both to confirm young, late-type star status and to investigate the evolution of magnetic (coronal) activity in stars whose masses potentially range from a few tenths of a solar mass down to near the H-burning limit. This work is supported by NASA Astrophysics Data Analysis Program award NNX12AH37G to RIT and UCLA and Chilean FONDECYT grant 3130520 to Universidad de Chile.
- Publication:
-
American Astronomical Society Meeting Abstracts #223
- Pub Date:
- January 2014
- Bibcode:
- 2014AAS...22344130K