2009ApJ...705.1173R

Query : 2009ApJ...705.1173R

2009ApJ...705.1173R - Astrophys. J., 705, 1173-1182 (2009/November-2)

Brown dwarf disks at ages of 5-10 myr.

RIAZ B., LODIEU N. and GIZIS J.E.

Abstract (from CDS):

We present Spitzer/IRAC and MIPS 24 µm observations for 28 brown dwarfs in the Upper Scorpius (UppSco) region. We find a disk fraction of 10.7%+8.7%–3.3%. One object shows a small excess at 24 µm but none at shorter wavelengths, and may be a candidate transition disk. Three objects show emission in the 10 µm silicate feature and we present compositional fits for these sources. Flat structures are observed for all disk sources in UppSco. Also presented are the MIPS/70 µm observations for the TW Hydrae Association brown dwarf 2MASS J1139511-315921. We discuss the structure and chemistry of brown dwarf disks at ages of ∼5-10 Myr, and consider the possible effects of the brown dwarf densities in these clusters on the disk lifetimes.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - open clusters and associations: individual (Taurus, Upper Scorpius) - stars: low-mass, brown dwarfs

Simbad objects: 42

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Number of rows : 42
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
2 [BCG93] 1 TT* 04 14 17.6095515480 +28 06 09.654704388 18.04         M4.5 126 0
3 2MASS J04190110+2819420 TT* 04 19 01.1052204768 +28 19 42.090142476           M5.9 77 0
4 CRTS J042959.5+243307 LM* 04 29 59.5077712896 +24 33 07.686479628     16.31 17.9 15.7 M5.5 67 0
5 2MASS J04321606+1812464 TT* 04 32 16.0659498216 +18 12 46.383640812   19.20 17.595     M6.5 97 0
6 V* GM Tau LM* 04 38 21.3383367240 +26 09 13.775325624     17.577   15.04 M6.5 130 0
7 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
8 2MASS J04414825+2534304 LM* 04 41 48.2522778888 +25 34 30.571843656         17.03 M8e 65 0
9 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
10 TWA 28 LM* 11 02 09.8378779824 -34 30 35.562199176     21.46 19.14 17.90 M8.3 91 0
11 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
12 TWA 26 LM* 11 39 51.1378374696 -31 59 21.443660124         15.83 M8e 125 0
13 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 376 0
14 2MASS J15594802-2227162 Or* 15 59 48.0231409320 -22 27 16.298348112       19.1 16.5 M7.5 18 0
15 UScoCTIO 112 TT* 16 00 26.7024470616 -20 56 31.619155452           M5.5e 43 0
16 UScoCTIO 110 Or* 16 04 43.0361205792 -23 18 25.970702328       19.0 15.9 M6.5 26 0
17 2MASS J16053077-2246200 Or* 16 05 30.7818045888 -22 46 20.048389032       18.8 16.1 M6 20 0
18 2MASS J16075850-2039485 Or* 16 07 58.5010573560 -20 39 48.578293764       18.4 15.8 M6 22 0
19 2MASS J16093019-2059536 LM* 16 09 30.1908214320 -20 59 53.693531556       18.8 16.2 M6 27 0
20 DENIS J160958.5-234518 LM* 16 09 58.5229770408 -23 45 18.720773604           M6.5 37 0
21 2MASS J16095990-2155424 LM* 16 09 59.9100261648 -21 55 42.590244468       19.3 16.4 M6.5 21 0
22 2MASS J16103876-1829235 Or* 16 10 38.7733317720 -18 29 23.556347664       19.2 16.5 M6 17 0
23 2MASS J16111711-2217173 Or* 16 11 17.1223539048 -22 17 17.387135448       19.7 16.8 M7.5 24 0
24 2MASS J16112959-1900292 Or* 16 11 29.5945514328 -19 00 29.265815556       19.0 16.462 M6 19 0
25 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
26 2MASS J16121185-2047267 LM* 16 12 11.8639614888 -20 47 26.674202256       18.7 15.9 M6.5 26 0
27 2MASS J16123759-2349234 Or* 16 12 37.5902432400 -23 49 23.281445640       18.5 16.0 M6 17 0
28 2MASS J16124692-2338408 Or* 16 12 46.9237078416 -23 38 40.788541860       18.7 15.9 M6 27 0
29 2MASS J16131211-2305031 Or* 16 13 12.1196002512 -23 05 03.303030048       19.1 16.4 M6.5 23 0
30 2MASS J16141974-2428404 Or* 16 14 19.7410117128 -24 28 40.480240332       18.7 16.0 M6 23 0
31 2MASS J16151116-2420153 Or* 16 15 11.1618119832 -24 20 15.406503612       19.0 16.3 M6 23 0
32 2MASS J16155507-2444365 Or* 16 15 55.0788886512 -24 44 36.525085188       18.6 15.7 M6 22 0
33 2MASS J16174539-2353360 Or* 16 17 45.4023178656 -23 53 36.048897168       19.2 16.3 M6 18 0
34 DENIS J161939.8-214535 Y*O 16 19 39.76368 -21 45 34.9992           M7 26 0
35 2MASS J16200757-2359150 Or* 16 20 07.5710545104 -23 59 14.966422476       18.5 15.6 M6 23 0
36 2MASS J16202128-2120289 Or* 16 20 21.2855533944 -21 20 28.924233180       18.5 15.5 M6 17 0
37 2MASS J16224385-1951057 Or* 16 22 43.8550223256 -19 51 05.741328384       17.0 15.0 M8 26 0
38 2MASS J16252860-1658509 Y*O 16 25 28.6008547080 -16 58 51.010581972       19.2 16.2 M8 18 0
39 2MASS J16253672-2224285 Or* 16 25 36.7309649832 -22 24 28.642940640       18.7 15.9 M7 19 0
40 2MASS J16263026-2336551 Or* 16 26 30.2739566544 -23 36 55.298648196       18.9 16.5 M6 18 0
41 2MASS J16265619-2213519 Or* 16 26 56.1972404808 -22 13 51.978051480       18.5 15.7 M6 27 0
42 2MASS J16324727-2059375 Or* 16 32 47.2684120488 -20 59 37.584805668       17.9 15.5 M6 17 0

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