Nearby Young Kinematic Group Member a Combination of Kinematics, Photometry, Age-dating Indicators and Statistics to Assign Membership

Monday, 19 August 2013 9 a.m. — 10 a.m. MST

AURA Lecture Hall

NOIRLab South Colloquia
LISON MALO (University of Montreal, Canada & NOAO South Visiting Astronomer)

Young nearby associations provide a crucial sample of starsfor studying the local star formation history, investigating the earlyphases of planet formation, and searching for exoplanets throughdirect imaging. Young associations, being sparsely populated andrelatively close to the Sun, their members are found all over thesky. While known members of nearby young associations were confirmedmostly through HIPPARCOS data, only the most massive (F, G and K)members have been identified so far. As the initial mass functionpeaks around 0.3 Msun (~M3V), the majority of young nearby objectshave yet to be discovered. In this talk, I will describe the paststudies carried out on the detection of members of kinematic groups. I will explain the method by which we used kinematics, photometricproperties of young members combined with a Bayesian statistic to identify highly probable members of those young kinematicassociations. I will also present the key elements leading to thedetection of these objects. This on-going work focuses on radialvelocity measurement to confirm their membership and age-datingindicator measurement to confirm their age.