NOAO > Observing Info > Approved Programs > 2011A-0412
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NOAO > Observing Info > Approved Programs > 2011A-0412 |
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PI: Lison Malo, Universite de Montreal, malo@astro.umontreal.ca
Address: Departement de Physique, C.P. 6128, Succursale Centre-Ville, Montreal, Qc H3C 3J7, Canada
CoI: Rene Doyon, Universite de Montreal
CoI: Etienne Artigau, Universite de Montreal
CoI: David Lafreniere, Universite de Montreal
CoI: Marie-Eve Naud, Universite de Montreal
Title: Age-Dating of Low-Mass Candidate members of Nearby Young Kinematic Groups
Abstract:
Young nearby associations provide a crucial sample of stars for
studying the local star formation history, investigating the early
phases of planet formation, and searching for exoplanets through direct
imaging. While numerous new associations have been identified in the
last decade, their members are mostly restricted to relatively massive
F, G and K stars. Through a novel statistical analysis, we have
identified 160 highly probable young low-mass members of betaPictoris,
and AB Doradus moving groups and Tucana-Horologium association. While
the kinematics of these stars indicate membership to these associations
their young age must be confirmed through the measurement of several
spectroscopic age indicators. That is what we propose to do with Hydra
for 23 southern candidates available this semester. These spectroscopic
youth indicators are molecular absorption bands ratio (e.g. CaH),
lithium absorption, Halpha and He line profiles (accretion) and
rotation. Our program will significantly improve (double) the census of
BetaPic, Tuc/Hor and AB Dor members.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2011A-0412 |
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