Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21545509s&link_type=abstract
American Astronomical Society, AAS Meeting #215, #455.09; Bulletin of the American Astronomical Society, Vol. 42, p.474
Other
Scientific paper
We present results from our continuing program to identify new, low-mass, late spectral type members of the nearby young moving groups (NYMGs) using a proper motion selection algorithm and various observational techniques. We have three goals: 1) To provide high priority targets for exoplanet searches by direct imaging, 2) To complete the census of the membership in the NYMGs down to approx. 0.1 Msun, and thus, 3) To provide a well-characterized sample of nearby (at least twice as close as young stars in Taurus and Ophiuchus), young (8-50 Myr) stars for detailed study of their physical properties and multiplicity. Our program proceeds in the following way: we apply the selection algorithm to the TYCHO-2 proper motion catalog, supplemented by 2MASS, and the SUPERBLINK proper motion survey. Initial selection cuts of candidate members are based on the mean motion of existing NYMG members and the proper motions and photometric distances of prospective candidates. NYMG membership is further investigated using possible signs of youth, including H-alpha emission and X-ray flux, and then verified through radial velocity measurements. We identify TYC 523 573 1 (K7) and TYC 5899 26 1 (M4) as new, low-mass members of the AB Doradus (AB Dor) NYMG. We also rule out the membership of several other AB Dor and Beta Pictoris (B Pic) NYMG candidates. To date our program has identified 9 new NYMG members of spectral type K7 or later.
Lepine Sebastien
Schlieder Joshua E.
Simon Manfred
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