SIMBAD references

2004A&A...427..245S - Astronomy and Astrophysics, volume 427, 245-250 (2004/11-3)

Evolution of young brown dwarf disks in the mid-infrared.

STERZIK M.F., PASCUCCI I., APAI D., VAN DER BLIEK N. and DULLEMOND C.P.

Abstract (from CDS):

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 (≃2Myr) Cha Hα1 we measure fluxes at 10.4µm and 12.3µm that are fully consistent with a standard flared disk model and prominent silicate emission. For the ≃10Myr old brown dwarf 2MASS1207-3932 located in the TW Hydrae association we find excess emission at 8.7µm and 10.4µm with respect to the photosphere, and confirm disk accretion as a 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 dwarf disks may appear on a timescale of 10Myr and can be witnessed by observations in the mid-infrared.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - stars: low-mass, brown dwarfs - stars: formation

Simbad objects: 9

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2004A&A...427..245S and select 'bookmark this link' or equivalent in the popup menu


2020.01.27-12:53:23

© Université de Strasbourg/CNRS

    • Contact