2010A&A...515A..91M


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.30CEST18:43:15

2010A&A...515A..91M - Astronomy and Astrophysics, volume 515, A91-91 (2010/6-1)

The large-scale disk fraction of brown dwarfs in the Taurus cloud as measured with Spitzer.

MONIN J.-L., GUIEU S., PINTE C., REBULL L., GOLDSMITH P., FUKAGAWA M., MENARD F., PADGETT D., STAPELFELDT K., McCABE C., CAREY S., NORIEGA-CRESPO A., BROOKE T., HUARD T., TEREBEY S., HILLENBRAND L. and GUEDEL M.

Abstract (from CDS):

The brown dwarf (BD) formation process has not yet been completely understood. To shed more light on the differences and similarities between star and BD formation processes, we study and compare the disk fraction among both kinds of objects over a large angular region in the Taurus cloud. In addition, we examine the spatial distribution of stars and BD relative to the underlying molecular gas. In this paper, we present new and updated photometry data from the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope on 43 BDs in the Taurus cloud, and recalculate of the BD disk fraction in this region. We also useed recently available CO mm data to study the spatial distribution of stars and BDs relative to the cloud's molecular gas. We find that the disk fraction among BDs in the Taurus cloud is 41±12%, a value statistically consistent with the one among TTS (58±9%). We find that BDs in transition from a state where they have a disk to a diskless state are rare, and we study one isolated example of a transitional disk with an inner radius of ≃0.1AU (CFHT BD Tau 12, found via its relatively small mid-IR excess compared to most members of Taurus that have disks. We find that BDs are statistically found in regions of similar molecular gas surface density to those associated with stars. Furthermore, we find that the gas column density distribution is almost identical for stellar and substellar objects with and without disks.

Abstract Copyright:

Journal keyword(s): stars: formation - brown dwarfs - circumstellar matter - surveys - catalogs

Simbad objects: 48

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Number of rows : 48

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IC 348 OpC 03 44 34 +32 09.8           ~ 1235 1
2 2MASS J04141188+2811535 Y*O 04 14 11.8823284464 +28 11 53.410193839 18.72         M6e 47 0
3 [BLH2002] KPNO-Tau 1 LM* 04 15 14.7224038902 +28 00 09.386264531     24.063     M8.5Ve 37 0
4 2MASS J04152409+2910434 TT* 04 15 24.1017606897 +29 10 43.514652084           M7 20 0
5 2MASS J04161885+2752155 TT* 04 16 18.8592740928 +27 52 15.375920546           M8.0 21 0
6 [BLH2002] KPNO-Tau 2 LM* 04 18 51.1522243376 +28 14 33.296824693     21.376     M7.5Ve 38 0
7 [BLH2002] KPNO-Tau 12 Y*O 04 19 01.2808784328 +28 02 48.145982297     23.228     M9Ve 48 0
8 [MDM2001] CFHT-BD-Tau 10 BD* 04 21 46.3104454321 +26 59 29.396088687           M6IVe 27 0
9 2MASS J04215450+2652315 TT* 04 21 54.5256903324 +26 52 31.353073628           M8.5 26 0
10 2MASS J04221644+2549118 BD* 04 22 16.4374053783 +25 49 11.813862323           M8IVe 21 0
11 2MASS J04242090+2630511 Y*O 04 24 20.8977757596 +26 30 51.064923798           M6.5 24 0
12 [MDM2001] CFHT-BD-Tau 9 BD* 04 24 26.4612148911 +26 49 50.250899575         15.35 M6IVe 31 0
13 2MASS J04263055+2443558 BD* 04 26 30.5575174268 +24 43 55.835559684           L0.6 23 0
14 [BLH2002] KPNO-Tau 4 BD* 04 27 27.9997171623 +26 12 05.097974406     24.722 20.54 18.75 L0 65 0
15 2MASS J04274538+2357243 BD* 04 27 45.3878215999 +23 57 24.417294735         17.94 M8IVe 25 0
16 2MASS J04290068+2755033 TT* 04 29 00.6843498970 +27 55 03.298881009           M8.8 28 0
17 [BLH2002] KPNO-Tau 5 LM* 04 29 45.6733565875 +26 30 46.559502443     19.690 19.10 15.08 M7.5Ve 47 0
18 [BLH2002] KPNO-Tau 6 BD* 04 30 07.2484355471 +26 08 20.698295788     22.292 20.56 17.90 M8.5Ve 50 0
19 EPIC 247739445 LM* 04 30 23.6516358028 +23 59 12.991548656         17.91 M9.9 27 0
20 [BLH2002] KPNO-Tau 7 LM* 04 30 57.2037457394 +25 56 39.560007407     22.068   17.16 M8Ve 46 0
21 2MASS J04311907+2335047 TT* 04 31 19.0749924642 +23 35 04.799712711       20.3 17.5 M8 24 0
22 2MASS J04312669+2703188 BD* 04 31 26.6898772881 +27 03 18.809763277         17.90 M7IVe 25 0
23 2MASS J04320329+2528078 TT* 04 32 03.2929760993 +25 28 07.783546888           M7.6 23 0
24 2MASS J04321786+2422149 TT* 04 32 17.8722821712 +24 22 14.906649942     18.2 16.63 14.12 M6.5 36 0
25 2MASS J04322329+2403013 TT* 04 32 23.3105661797 +24 03 01.465743295           M8.9 24 0
26 2MASS J04325026+2422115 BD* 04 32 50.2665216453 +24 22 11.670257724         18.79 M7.5 30 0
27 2MASS J04330945+2246487 LM* 04 33 09.4629919840 +22 46 48.623660040         16.26 M7.0 32 0
28 2MASS J04334291+2526470 BD* 04 33 42.9227698549 +25 26 46.843807910           L0.1 24 0
29 2MASS J04335245+2612548 Y*O 04 33 52.4693431346 +26 12 54.503198748           M8.5 21 0
30 2MASS J04341527+2250309 Y*O 04 34 15.2773856137 +22 50 30.804533445     23.427     M7 41 0
31 2MASS J04350850+2311398 BD* 04 35 08.5146057314 +23 11 39.891959581     18.4   14.88 M7IVe 26 0
32 2MASS J04354526+2737130 BD* 04 35 45.2742517434 +27 37 13.118928456           L0.9 22 0
33 [BLH2002] KPNO-Tau 9 LM* 04 35 51.4277984148 +22 49 11.868048124     24.918   18.76 M8.5V 38 0
34 2MASS J04361030+2159364 TT* 04 36 10.3043328287 +21 59 36.475545597           M8.5 22 0
35 2MASS J04361038+2259560 BD* 04 36 10.3838421343 +22 59 56.003013804     22.520   16.81 M8Ve 46 0
36 2MASS J04363893+2258119 BD* 04 36 38.9288541165 +22 58 11.845890661     21.654   16.88 M7.75 45 0
37 ITG 2 Y*O 04 38 00.8675100119 +25 58 57.275767004       20.21 14.71 M7e 31 0
38 ITG 3 Y*O 04 38 14.8833303682 +26 11 39.971794234       20.33 17.84 M7e 51 0
39 V* GM Tau Or* 04 38 21.3390129259 +26 09 13.784439336     17.577   15.04 M6.5 93 0
40 2MASS J04390396+2544264 BD* 04 39 03.9603916514 +25 44 26.337817736       18.40 15.40 M7IVe 51 0
41 ITG 17 Y*O 04 39 47.4820305505 +26 01 40.693626234     21.556   15.78 M7 85 0
42 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3532 0
43 ITG 34 Y*O 04 41 10.7863139705 +25 55 11.540472769       19.28 16.43 M5.5e 37 0
44 2MASS J04414825+2534304 BD* 04 41 48.2522895943 +25 34 30.569106360         17.03 M8e 47 0
45 IRAS S04414+2506 BD* 04 44 27.1421731772 +25 12 16.439761677           M7e 62 0
46 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 490 0
47 NAME Cha I MoC 11 06 48 -77 18.0           ~ 983 1
48 NAME Upper Sco Association As* 16 12 -23.4           ~ 1049 1

    Equat.    Gal    SGal    Ecl

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2020.09.30-18:43:15

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