2005ApJ...631L..69L

Query : 2005ApJ...631L..69L

2005ApJ...631L..69L - Astrophys. J., 631, L69-L72 (2005/September-3)

The disk fractions of brown dwarfs in IC 348 and Chamaeleon I.

LUHMAN K.L., LADA C.J., HARTMANN L., MUENCH A.A., MEGEATH S.T., ALLEN L.E., MYERS P.C., MUZEROLLE J., YOUNG E. and FAZIO G.G.

Abstract (from CDS):

Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I star-forming clusters, respectively (>M6, M≲0.08 M☉). We find that 42%±13% and 50%±17% of the two samples exhibit excess emission indicative of circumstellar disks. In comparison, the disk fractions for stellar members of these clusters are 33%±4% and 45%±7% (M0-M6, 0.7 M☉≳M≳0.1 M☉). The similarity in the disk fractions of stars and brown dwarfs is consistent with a common formation mechanism and indicates that the raw materials for planet formation are available around brown dwarfs as often as around stars.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Stars: Planetary Systems: Protoplanetary Disks - Stars: Formation - Stars: Low-Mass, Brown Dwarfs - Stars: Pre-Main-Sequence

Simbad objects: 53

goto Full paper

goto View the references in ADS

Number of rows : 53
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 437 Or* 03 43 56.3879292504 +32 09 59.229391356           M7 21 0
2 Cl* IC 348 LRL 468 Y*O 03 44 11.070 +32 01 43.60           M8 14 0
3 Cl* IC 348 LRL 2103 * 03 44 14.919 +32 13 43.53           M9 7 0
4 Cl* IC 348 LRL 329 TT* 03 44 15.5745024960 +32 09 21.826029564       20.94 17.550 M7.5 39 0
5 [PSZ2003] J034416.2+320540 Y*O 03 44 16.176 +32 05 40.96         21.313 M9 12 0
6 Cl* IC 348 LRL 363 TT* 03 44 17.2586377536 +32 00 15.286843440         18.32 M6.6 31 0
7 [PSZ2003] J034419.7+320645 Y*O 03 44 19.666 +32 06 45.93         19.804 M7 12 0
8 Cl* IC 348 H 90 TT* 03 44 21.1458506040 +32 06 16.699596840         18.207 M9.0 30 0
9 [PSZ2003] J034426.4+320809 Y*O 03 44 26.367 +32 08 09.94           M9 13 0
10 Cl* IC 348 LRL 613 * 03 44 26.86 +32 09 25.7         19.737 M8 24 0
11 Cl* IC 348 LRL 935 Y*O 03 44 26.91 +32 12 50.6         19.105 M8 10 0
12 [PSZ2003] J034427.2+320346 Y*O 03 44 27.169 +32 03 46.60         20.662 M9 13 0
13 Cl* IC 348 LRL 415 Or* 03 44 29.9646321432 +32 09 39.453891156           M6 33 0
14 Cl* IC 348 LRL 611 Y*O 03 44 30.36 +32 09 44.7           M8 15 0
15 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
16 Cl* IC 348 LRL 603 Y*O 03 44 33.42 +32 10 31.5           M8 18 0
17 [PSZ2003] J034433.7+320547 Y*O 03 44 33.691 +32 05 46.71           M8 10 0
18 Cl* IC 348 H 149 Or* 03 44 34.0402709304 +32 06 57.087545688       19.47 16.927 M7.25 33 0
19 Cl* IC 348 LRL 1050 * 03 44 34.87416 +32 15 00.2340           M9 8 0
20 Cl* IC 348 LRL 478 Or* 03 44 35.9312334456 +32 11 17.489871996         18.524 M6 27 0
21 Cl* IC 348 LRL 690 Y*O 03 44 36.38 +32 03 05.4           M8 11 0
22 Cl* IC 348 LRL 703 Y*O 03 44 36.62 +32 03 44.2         19.917 M8 12 0
23 Cl* IC 348 LRL 355 Or* 03 44 39.1974844872 +32 08 13.757248464         18.034 M8 32 0
24 Cl* IC 348 LRL 316 TT* 03 44 57.7142078328 +32 07 41.688016860         17.58 ~ 26 0
25 [PSZ2003] J034503.6+321213 Y*O 03 45 03.606 +32 12 13.95           M8 9 0
26 Cl* IC 348 LRL 407 Y*O 03 45 04.141 +32 05 04.38           M7 16 0
27 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
28 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
29 2MASS J11011926-7732383 ** 11 01 19.266 -77 32 38.31       19.4 16.59 M7+M8 36 0
30 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
31 [NC98] Cha HA 12 Or* 11 06 37.9647720216 -77 43 09.113892564     20.6   15.91 M6.5e 45 0
32 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
33 [NC98] Cha HA 1 Or* 11 07 16.6710048312 -77 35 53.212777692   22.8 21.0   16.38 M7.5/8e 100 0
34 [NC98] Cha HA 7 Or* 11 07 37.7410696536 -77 35 30.793352928   23.7 22.2   17.03 M8e 43 0
35 NAME Cha I South reg 11 07 44 -77 34.8           ~ 12 0
36 ISO-ChaI 138 LM* 11 08 18.4691867664 -77 30 40.891618332         16.77 ~ 44 0
37 2MASS J11082404-7739299 Or* 11 08 24.0583968960 -77 39 30.056968764   22.6 21.6   17.10 ~ 36 0
38 2MASS J11082570-7716396 Y*O 11 08 25.70520 -77 16 39.6192       23.46 20.75 M8 13 0
39 2MASS J11082927-7739198 LM* 11 08 29.2579779792 -77 39 19.777635504   21.9 19.9   17.59 M7.5 37 0
40 2MASS J11084952-7638443 LM* 11 08 49.3978866936 -76 38 44.263501296       22.66 19.93 M8.75 12 0
41 [LES2004] ChaI 737 LM* 11 08 51.7639341312 -76 32 50.333141112       20.34 18.230 M7.25 14 0
42 NAME Cha I North reg 11 09 29.4 -76 33 28           ~ 13 0
43 2MASS J11093543-7731390 Or* 11 09 35.2850112648 -77 31 39.222724152       22.39 19.88 M8.25 8 0
44 ISO-ChaI 217 Or* 11 09 52.1372780448 -76 39 12.876642648         16.63 ~ 47 0
45 2MASS J11100658-7642486 Y*O 11 10 06.58824 -76 42 48.6576       23.27 20.67 M9.25 7 0
46 OTS 44 Y*O 11 10 09.34392 -76 32 17.8512           M9.5+ 70 0
47 CHXX 16 LM* 11 10 22.2523149192 -76 25 13.841167332         16.58 M8.0 42 0
48 2MASS J11104006-7630547 LM* 11 10 40.0518736224 -76 30 54.776504160       20.018 18.215 M8.0 12 0
49 [LES2004] ChaI 436 LM* 11 11 22.5089833368 -77 45 42.865309980           M8.25 12 0
50 [LES2004] ChaI 743 LM* 11 11 45.3114630360 -76 36 50.356723680           M8 16 0
51 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
52 V* U Sco CV* 16 22 30.7791646104 -17 52 43.166822628           F8+K2 592 0
53 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1

To bookmark this query, right click on this link: simbad:objects in 2005ApJ...631L..69L and select 'bookmark this link' or equivalent in the popup menu