NOAO > Observing Info > Approved Programs > 2011B-0302
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NOAO > Observing Info > Approved Programs > 2011B-0302 |
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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, Quebec 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 and Radial Velocity 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 with NICI and GPI. While numerous new associations have been
identified in the last decade, their members are mostly restricted to
relatively massive (F,G,K) stars. Through a novel statistical analysis,
we have identified 145 highly probable young low-mass members of Beta
Pictoris, and AB Doradus moving groups and Tucana-Horologium
association. A confirmation of their membership and their young age
require, however, measurements of their radial velocity and several
spectroscopic age indicators. That is what we propose to do with CHIRON
for 15 southern candidates. These spectroscopic youth indicators are
molecular absorption bands ratio (CaH), lithium absorption, Halpha and
HeI line profiles (accretion) and rotation. Our program will
significantly improve (double) the census of BetaPic, Tuc/Hor and ABDor
members. Previous NOAO time allocation has already confirmed 44 late-
type members of these associations.
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 > 2011B-0302 |
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