First Results: A Custom Near-IR Filter For Finding Young Brown Dwarfs

Details First Results: A Custom Near-IR Filter For Finding Young Brown Dwarfs First Results: A Custom Near-IR Filter For Finding Young Brown Dwarfs

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110315a&link_type=abstract

American Astronomical Society, AAS Meeting #211, #103.15; Bulletin of the American Astronomical Society, Vol. 39, p.921

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the first results from our custom near-IR filter designed for use with ULBCAM on UH 88" telescope. Our 6% wide filter is centered on the 1.45 micron steam absorption feature seen prominently in the spectra of M and L type objects, and is designed to determine spectral type, independent of gravity and reddening, to within one subtype. For identifying young brown dwarfs in star-forming regions, our filter is designed to reduce the number of contaminant field dwarfs, giants, and extragalactic objects, thereby increasing the efficiency of spectroscopic followup over existing broad-band-only photometric selected samples. We discuss our data reduction and calibration procedures, and present observations of the Ophiuchus Star-Forming Region.
This work is supported by NSF grant AST-0407441 and the Alfred P. Sloan Foundation

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