A Near Infrared Study of Young Field Brown Dwarfs

Details A Near Infrared Study of Young Field Brown Dwarfs A Near Infrared Study of Young Field Brown Dwarfs

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21730701a&link_type=abstract

American Astronomical Society, AAS Meeting #217, #307.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the results of a near infrared spectroscopic survey of 53 M6-L8 type field dwarfs displaying evidence of youth (low-gravity). Our survey includes both low (R 150) and moderate (R 1200) resolution spectra. By examining FeH, VO, Na, K and H2O features, we have developed a set of criteria for estimating the relative ages of young brown dwarfs. We compare the signatures of low-gravity in the near-IR to those seen in the optical spectra of young field dwarfs. Using the relative ages determined for our sources, we examine the relationship between youth and near and mid-IR photometric colors. By using our age estimates and published proper motions, we assess membership of these young field objects in known young moving groups.

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