2003AJ....126.1515J

Query : 2003AJ....126.1515J

2003AJ....126.1515J - Astron. J., 126, 1515-1521 (2003/September-0)

A disk census for young brown dwarfs.

JAYAWARDHANA R., ARDILA D.R., STELZER B. and HAISCH K.E.Jr

Abstract (from CDS):

Recent surveys have identified substellar objects down to planetary masses in nearby star-forming regions. Reliable determination of the disk frequency in young brown dwarfs is of paramount importance to understanding their origin. Here we report the results of a systematic study of infrared L'-band (3.8 µm) disk excess in ∼50 spectroscopically confirmed objects near and below the substellar boundary in several young clusters. Our observations, using the ESO Very Large Telescope, Keck I, and the NASA Infrared Telescope Facility, reveal that a significant fraction of brown dwarfs harbor disks at a very young age. Their inner disk lifetimes do not appear to be vastly different from those of disks around T Tauri stars. Our findings are consistent with the hypothesis that substellar objects form via a mechanism similar to solar-mass stars.

Abstract Copyright: ∼

Journal keyword(s): Stars: Circumstellar Matter - Stars: Planetary Systems: General - Stars: Formation - Stars: Low-Mass, Brown Dwarfs - Stars: Pre-Main-Sequence

Simbad objects: 63

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Number of rows : 63
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 Cl* IC 348 LRL 256 Y*O 03 43 55.2696870168 +32 07 53.319253980   21.96 20.10     M5 40 0
2 Cl* IC 348 LRL 367 TT* 03 43 59.1606847752 +32 05 56.785053696       19.74 17.69 M5.2 27 0
3 Cl* IC 348 LRL 363 TT* 03 44 17.2586377536 +32 00 15.286843440         18.32 M6.6 31 0
4 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
5 Cl* IC 348 LRL 165 Or* 03 44 35.4519250704 +32 08 56.363890776     20.73 17.71 16.028 M5.25 55 0
6 Cl* IC 348 LRL 478 Or* 03 44 35.9312334456 +32 11 17.489871996         18.524 M6 27 0
7 Cl* IC 348 LRL 286 TT* 03 45 06.7121992152 +32 09 30.737803608       18.76 16.59 M5.7 35 0
8 [BLH2002] KPNO-Tau 1 LM* 04 15 14.7215444352 +28 00 09.383811048     24.063     M8.5Ve 44 0
9 [BLH2002] KPNO-Tau 2 LM* 04 18 51.1523690496 +28 14 33.297388728     21.376     M7.5Ve 50 0
10 [BLH2002] KPNO-Tau 3 LM* 04 26 29.3897362632 +26 24 13.719254868     20.239     M6Ve 64 0
11 [BLH2002] KPNO-Tau 4 BD* 04 27 27.9991044840 +26 12 05.085665388     24.722 20.54 18.75 L0 73 0
12 [BLH2002] KPNO-Tau 5 LM* 04 29 45.6727447200 +26 30 46.560493080     19.690 19.10 15.08 M7.5Ve 64 0
13 [BLH2002] KPNO-Tau 6 LM* 04 30 07.2454086048 +26 08 20.709374568     22.292 20.56 17.90 M8.5Ve 65 0
14 [BLH2002] KPNO-Tau 7 LM* 04 30 57.2037785664 +25 56 39.548804460     22.068   17.16 M8Ve 61 0
15 [BLH2002] KPNO-Tau 8 LM* 04 35 41.8389482952 +22 34 11.594810064 20.64   19.261     M6Ve 53 0
16 [BLH2002] KPNO-Tau 9 LM* 04 35 51.4276211184 +22 49 11.851904748     24.918   18.76 M8.5V 47 0
17 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
18 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
19 [BZR99] S Ori 40 Or* 05 37 36.4816663032 -02 41 56.713683516   23.22   20.12 17.79 M3.5 20 0
20 [BZR99] S Ori 12 Or* 05 37 57.4587695400 -02 38 44.468902788   20.61 19.81 18.15 16.42 M4.5/6V 33 0
21 [BZR99] S Ori 29 Or* 05 38 29.6185929264 -02 25 14.270648484   21.05 20.72 19.02 17.02 M4.0 21 0
22 [BZR99] S Ori 39 Or* 05 38 32.4445347456 -02 29 57.296432760 21.027 22.98   19.77 17.71 M6.5 19 0
23 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
24 [BZR99] S Ori 17 Y*O 05 39 04.4949780000 -02 38 35.381301036     20.00 18.92 16.80 M6 17 0
25 [BZR99] S Ori 25 Or* 05 39 08.9497481544 -02 39 57.986417520     21.09 19.34 17.02 M6.5V 26 0
26 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
27 CHXR 73 Or* 11 06 28.7641341696 -77 37 33.140151012         15.78 M3e 55 1
28 [NC98] Cha HA 12 Or* 11 06 37.9647720216 -77 43 09.113892564     20.6   15.91 M6.5e 45 0
29 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
30 CHXR 74 TT* 11 06 57.3114166800 -77 42 10.639632780         13.66 M3Ve 55 0
31 [NC98] Cha HA 1 Or* 11 07 16.6710048312 -77 35 53.212777692   22.8 21.0   16.38 M7.5/8e 100 0
32 [NC98] Cha HA 9 Or* 11 07 18.5760916584 -77 32 51.561674700     23.1   17.57 M5.5e 61 0
33 [NC98] Cha HA 7 Or* 11 07 37.7410696536 -77 35 30.793352928   23.7 22.2   17.03 M8e 43 0
34 V* HK Cha Or* 11 07 42.3364909752 -77 33 59.394350844   21.9 19.8   15.26 M5.25e 93 0
35 [NC98] Cha HA 8 Or* 11 07 46.0912894776 -77 40 08.918309388   22.2 20.1   15.61 M5.75e 51 1
36 V* HL Cha Or* 11 07 52.2574621728 -77 36 57.037742172   21.5 19.51   15.07 M5.5e 59 0
37 [NC98] Cha HA 4 Or* 11 08 18.9694304592 -77 39 17.131209948   20.5 18.52   14.50 M5.5e 46 0
38 2MASS J11082404-7739299 Or* 11 08 24.0583968960 -77 39 30.056968764   22.6 21.6   17.10 ~ 36 0
39 [NC98] Cha HA 5 Or* 11 08 24.1193575992 -77 41 47.438803392   21.3 19.18   14.85 M5.5e 60 0
40 2MASS J11082927-7739198 LM* 11 08 29.2579779792 -77 39 19.777635504   21.9 19.9   17.59 M7.5 37 0
41 V* HQ Cha Or* 11 08 39.5017287912 -77 34 16.733892756   21.7 19.75   15.06 M5.75e 80 0
42 V* HR Cha Or* 11 08 54.1972860288 -77 32 11.656356468     19.1   15.01 M5.25e 48 0
43 TWA 26 LM* 11 39 51.1378374696 -31 59 21.443660124         15.83 M8e 125 0
44 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 376 0
45 UScoCTIO 137 PM* 15 56 47.9905426128 -23 47 42.533623104           M7V 8 0
46 UScoCTIO 104 Or* 15 57 12.7940996520 -23 43 46.491309768           M5e 33 0
47 UScoCTIO 128 TT* 15 59 11.3536574304 -23 38 00.356589060           M7e 57 0
48 UScoCTIO 132 PM* 15 59 37.7665915874 -22 54 13.841712334           M7 19 0
49 UScoCTIO 130 Or* 15 59 43.6603037232 -20 14 39.676605324           M6.5 32 0
50 UScoCTIO 112 TT* 16 00 26.7024470616 -20 56 31.619155452           M5.5e 43 0
51 UScoCTIO 109 ** 16 01 19.1516628312 -23 06 39.452356836           M6e 31 0
52 UScoCTIO 100 TT* 16 02 04.3054007904 -20 50 42.580429908         15.156 M7e 51 0
53 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
54 CRBR 2317.3-1925 Y*O 16 26 18.82056 -24 26 10.5216           M7 47 0
55 CRBR 2317.5-1630 * 16 26 19.11744 -24 23 16.5624           M5 4 0
56 [GY92] 5 Or* 16 26 21.5381846568 -24 26 00.994958844       18.30 15.80 M7 77 1
57 [GY92] 10 Y*O 16 26 22.18584 -24 23 52.3572           M8.5 33 0
58 [RR90] Oph 2320.8-1721 Y*O 16 26 22.26912 -24 24 07.0632           M8 72 0
59 [GY92] 59 TT* 16 26 31.3666819344 -24 25 30.308255112         18.90 M3.75 23 1
60 [GY92] 64 Y*O 16 26 32.52576 -24 26 35.4480           M8 24 0
61 [RR90] Oph 2349.8-2601 Or* 16 26 51.2924609616 -24 32 42.001375272           M8.5 57 0
62 BBRCG 21 Y*O 16 27 05.97624 -24 28 36.3252           M7 40 0
63 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1

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