NOAO >   Observing Info >   Approved Programs >   2012B-0222

Small NOAO Logo

Proposal Information for 2012B-0222


PI: Joshua Schlieder, Max Planck Institute for Astronomy, schlieder@mpia-hd.mpg.de
Address: Koenigstuhl 17, Heidelberg 69117, Germany

CoI: Michal Simon, Stony Brook University
CoI: Emily Rice, College of Staten Island, CUNY
CoI: Sebastien Lepine, American Museum of Natural History

Title: New Low-Mass Members of Nearby Young Moving Groups

Abstract: We are now ready to expand our program to identify new low-mass members of nearby young moving groups (NYMGs) to stars of mass \le0.3 M_\odot. This is important to: (1) complete the census of low-mass stars near the Sun, (2) provide high priority targets for disk and exoplanet studies by direct imaging, and (3) provide a well- characterized sample of nearby, young stars for detailed study of their physical and kinematic properties. Our proven technique starts with a proper motion selection algorithm, proceeds to vet the sample for indicators of youth, and requires as its last step the measurement of candidate member radial velocities (RVs). So far, we have measured more than 100 candidate RVs using CSHELL on the NASA-IRTF and PHOENIX on Gemini-South, yielding more than 50 likely new moving group members. Here we propose to continue our RV follow-up of candidate NYMG members using PHOENIX on the KPNO 4m. We aim to measure RVs and determine spectral types of 23 faint (V\ge15, H\ge9), late-type (\geM4) candidates of the (beta) Pic (10 Myrs), AB Dor (70 Myrs), Tuc/Hor (30 Myrs), and TW Hydrae (8 Myrs) moving groups.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2012B-0222

noaoprop-help@noao.edu

Small NOAO Logo