Evolution of Young Brown Dwarf Disks in the Mid-Infrared

Details Evolution of Young Brown Dwarf Disks in the Mid-Infrared Evolution of Young Brown Dwarf Disks in the Mid-Infrared

2004-06-21

arxiv.org/abs/astro-ph/0406460v2

Astron.Astrophys. 427 (2004) 245-250

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures

Scientific paper

10.1051/0004-6361:20041502

We have imaged two bona-fide brown dwarfs with TReCS/GEMINI-S and find mid-infrared excess emission that can be explained by optically thick dust disk models. In the case of the young ($\approx$2Myr) Cha H$\alpha$1 we measure fluxes at 10.4$\mu$m and 12.3$\mu$m that are fully consistent with a standard flared disk model and prominent silicate emission. For the $\approx$ 10Myr old brown dwarf 2MASS1207-3932 located in the TW Hydrae association we find excess emission at 8.7$\mu$m and 10.4$\mu$m with respect to its photosphere, and confirm disk accretion as likely cause of its strong activity. Disks around brown dwarfs likely last at least as long as their low-mass stellar counterparts in the T-Tauri phase. Grain growth, dust settling, and evolution of the geometry of brown dwarfs disks may appear on a timescale of 10Myr and can be witnessed by observations in the mid-infrared.

Affiliated with

Also associated with

No associations

Rating

Evolution of Young Brown Dwarf Disks in the Mid-Infrared does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evolution of Young Brown Dwarf Disks in the Mid-Infrared, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of Young Brown Dwarf Disks in the Mid-Infrared will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-57083