Other
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20711001g&link_type=abstract
American Astronomical Society Meeting 207, #110.01; Bulletin of the American Astronomical Society, Vol. 37, p.1338
Other
1
Scientific paper
We present Spitzer Space Telescope observations of two TW Hydrae Association brown dwarfs, 2MASSW J1207334-393254 and 2MASSW J1139511-315921, in the IRAC and MIPS 24 μm bands. Based on their IRAC colors, we have classified them as Classical and Weak T Tauri stars, respectively. For 2MASSW J1207334-393254, we have found that a flat disk model fits the data very well. This brown dwarf shows the presence of warm (T - 100 K) circumstellar dust close (R - 0.5 AU) to it, and does not display any signs of cleansing of dust within several AU of the star. In comparison with other TWA members that show excess in IR, we suggest that there exists a different disk evolution/dust processing mechanism for stellar and sub-stellar objects. 2MASSW J1139511-315921 does not show any significant excess in any of the IRAC bands, but a small one at 24 μm, which is not significant enough to suggest the presence of warm dust around this star. It shows signs of dust cleansing in the inner several AU, similar to most of the other TWA members.
Gizis John E.
Hmiel Abraham
Riaz Basmah
No associations
LandOfFree
Spitzer observations of two TW Hydrae Association brown dwarfs 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 Spitzer observations of two TW Hydrae Association brown dwarfs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spitzer observations of two TW Hydrae Association brown dwarfs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1283559