Using the SLoWPoKES Catalog to Study the Spectroscopic Properties and Constrain Empirical Models of M Dwarfs

Details Using the SLoWPoKES Catalog to Study the Spectroscopic Properties and Constrain Empirical Models of M Dwarfs Using the SLoWPoKES Catalog to Study the Spectroscopic Properties and Constrain Empirical Models of M Dwarfs

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21730703d&link_type=abstract

American Astronomical Society, AAS Meeting #217, #307.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

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The Sloan Wide Pairs of Kinematically Equivalent Stars (SLoWPoKES) catalog comprises of a sample of 1342 very wide, low-mass common proper motion pairs. The identification was based on angular separation, photometric distance, and component proper motions. A Galactic model, based on empirical stellar number density and space velocity distributions, was used to select pairs with a probability of chance alignment <5%. The selection criteria were purposely conservative to allow for efficient followup programs.
We report the results of a spectroscopic followup of 120 SLoWPoKES pairs using the KPNO 2.1-m telescope: (i) the matched radial velocity confirm the fidelity of the SLoWPoKES pairs, (ii) the metallicity sensitive zeta parameter proposed by Lepine et al. (2007), using CaH and TiO molecular band strengths, is robust in the Solar metallicity regime, and (iii) the H-alpha activity levels show that the West et al. (2008) activity-age relation can be used as a reliable age indicator for an ensemble but the magnitude of H-alpha fluctuations may limit its utility for individual stars. We are currently conducting follow-up work: (i) to calibrate the absolute metallicity scale using dG/dK-dM pairs, (ii) calibrating absolute ages using Wd-dM pairs, and (iii) testing the Barnes (2010) gyrochronology relations in low-mass stars. See http://www.vanderbilt.edu/astro/slowpokes/ for more details.

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