We present a detailed analysis of 10 proposed F and G members of the nearby, young moving group AB Doradus (ABD). Our sample was obtained using the 2.7 m telescope at the McDonald Observatory with the coude echelle spectrograph, achieving R ∼ 60,000 and signal-to-noise ratio ∼200. We derive spectroscopic Teff, log(g), [Fe/H], and microturbulance (vt) using a bootstrap method of the TGVIT software resulting in typical errors of 33K in T eff, 0.08 dex in log(g), 0.03 dex in [Fe/H], and 0.13 km s-1 in vt. Characterization of the ABD sample is performed in three ways: (1) chemical homogeneity, (2) kinematic traceback, and (3) isochrone fitting. We find the average metal abundance is [M/H] = -0.03 ± 0.06 with a traceback age of 125 Myr. Our stars were fit to three different evolutionary models and we found that the best match to our ABD sample is the YREC [M/H] = -0.1 model. In our sample of 10 stars, we identify 1 star that is a probable non-member, 3 enigmatic stars, and 6 stars with confirmed membership. We also present a list of chemically coherent stars from this study and the Barenfeld et al. study.
|State||Published - Oct 1 2014|
Bibliographical notePublisher Copyright:
© 2014. The American Astronomical Society. All rights reserved.
- stars: fundamental parameters
- stars: kinematics and dynamics
- stars: pre-main sequence
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science