A Study of Young Brown Dwarfs in the Mid Infrared

Details A Study of Young Brown Dwarfs in the Mid Infrared A Study of Young Brown Dwarfs in the Mid Infrared

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934527l&link_type=abstract

American Astronomical Society, AAS Meeting #219, #345.27

Astronomy and Astrophysics

Astronomy

Scientific paper

We present findings on the mid infrared colors (3-24 microns) of a sample of forty-six young( 10 100Myrs) field brown dwarfs with spectral types M thru L. The infrared data came from Spitzer's IRAC and MIPS instruments, as well as WISE's preliminary release data. When looking at SEDs we find seven of seventeen M type objects showing excesses at 12 and 24 microns likely due to a disk that is unexpected for their age. We also find that L types in general have redder near-IR colors than their field counterparts that persist up to about 5 microns. Young L-type brown dwarfs are known to have redder near-IR colors than their field counterparts. We discuss the plausibility of mechanisms causing these unusually red colors in both the near-IR and mid-IR. These mechanisms could help to understand the red color also found in the exoplanets HR8799BCD.

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