Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21724202w&link_type=abstract
American Astronomical Society, AAS Meeting #217, #242.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We present preliminary results from ACCOLADES, a study of high proper motion, low-mass dwarfs, identified from two-epoch photometric observations in SDSS. The chip gap geometry in the SDSS photometric camera required that a small amount of each CCD column be imaged twice to ensure full spatial coverage in a given SDSS stripe. Occasionally, these overlapping regions were imaged months or years apart. Therefore, a subset of the SDSS catalog can be mined to produce accurate proper motions for stars that fall within these overlap regions. We selected a sample of late-M and L type dwarfs identified in these regions with time baselines longer than 1 year and conducted a spectroscopic follow-up campaign to compute 3D space motions. We present the spectroscopic analysis of our ACCOLADES sample and examine the utility of using this data mining method to identify low-mass components of the Galactic stellar halo.
Bochanski John J.
Burgasser Adam Jonathan
Faherty Jacqueline K.
West Andrew A.
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