Characterizing the AB Doradus Moving Group via High-Resolution Spectroscopy and Kinematic Traceback

Authors

Kyle McCarthy, University of KentuckyFollow
Ronald J. Wilhelm, University of KentuckyFollow

Abstract

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 T _eff, log(g), [Fe/H], and microturbulance (v_t ) 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 v_t . 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.

Document Type

Article

Publication Date

9-15-2014

Notes/Citation Information

Published in The Astronomical Journal, v. 148, no. 4, article 70, p. 1-13.

© 2014. The American Astronomical Society. All rights reserved.

Reproduced by permission of the AAS.

Digital Object Identifier (DOI)

http://dx.doi.org/10.1088/0004-6256/148/4/70

Repository Citation

McCarthy, Kyle and Wilhelm, Ronald J., "Characterizing the AB Doradus Moving Group via High-Resolution Spectroscopy and Kinematic Traceback" (2014). Physics and Astronomy Faculty Publications. 258.
https://uknowledge.uky.edu/physastron_facpub/258