Using SuperWASP Rotation Periods to Detect Young Stars in the Solar Neighbourhood
Stellar, Exoplanet and Galactic Science from Massive, High-precision Variability Surveys
Alex Binks
Keele University
Robin D. Jeffries, Pierre F. L. Maxted
As well as discovering over 130 exoplanets, a by-product of the SuperWASP survey is that multi-seasonal light curves have been obtained for several millions of stars, from which precise rotation periods can be measured. We have created a catalog of several thousand FGK-type stars with rotation periods shorter than 5 days that have also been detected in the ROSAT X-ray catalog in an attempt to identify young stars within 100 pc. These objects are expect to be either young, single stars or tidally-locked spectroscopic binaries. We obtained optical spectra for a sub-sample of 146 to determine their ages, kinematics, and in some cases repeat radial velocity (RV) measurements were used to assess their binary status. In this talk, I will focus on the twenty-six likely-single objects found to have lithium abundances consistent with ages younger than 200 Myr (supported by H-alpha and rotational velocity measurements). There are ~ a dozen groups of nearby (
13:30 - 15:00