2002ApJ...573L.115A

Query : 2002ApJ...573L.115A

2002ApJ...573L.115A - Astrophys. J., 573, L115-L117 (2002/July-2)

Probing dust around brown dwarfs: the naked LP 944-20 and the disk of Chamaeleon Halpha 2.

APAI D., PASCUCCI I., HENNING T., STERZIK M.F., KLEIN R., SEMENOV D., GUNTHER E. and STECKLUM B.

Abstract (from CDS):

We present the first mid-infrared (MIR) detection of a field brown dwarf (BD) and the first ground-based MIR measurements of a disk around a young BD candidate. We prove the absence of warm dust surrounding the field BD LP 944-20. In the case of the young BD candidate Cha Hα 2, we find clear evidence for thermal dust emission from a disk. Surprisingly, the object does not exhibit any silicate feature as previously predicted. We show that the flat spectrum can be explained by an optically thick flat dust disk.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Stars: Circumstellar Matter - Stars: Individual: Constellation Name: Chamaeleon Hα 2 - Stars: Individual: Alphanumeric: LP 944-20 - Stars: Low-Mass, Brown Dwarfs

CDS comments: table 1 : misprints for objects 1 and 6. Correct identifications are (1) 2MASSW J2224438-015852, (6) 2MASSW J0832045-012835

Simbad objects: 12

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Number of rows : 12
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 Koenigstuhl 1B BD* 00 21 05.9180929272 -42 44 43.525081140       19.46 16.79 L0.6:V 36 0
2 2MASSW J0051107-154417 BD* 00 51 10.7916886128 -15 44 16.952460180       21.344 18.898 L6 24 0
3 DENIS J025503.3-470049 BD* 02 55 03.6927058871 -47 00 51.356903955     22.921 19.906 17.454 L9 170 0
4 2MASSW J0337036-175807 BD* 03 37 03.59592 -17 58 07.9068           L4.5V 27 0
5 LP 944-20 LM* 03 39 35.2523500210 -35 25 43.641996333     18.69 16.39 13.288 M9.5Ve 308 0
6 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
7 HD 42581 PM* 06 10 34.6149358167 -21 51 52.656352926 10.801 9.607 8.125 7.164 6.121 M1V 544 0
8 2MASSW J0832045-012835 BD* 08 32 04.5196565736 -01 28 36.042229668           L1.5V 36 0
9 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
10 V* HK Cha Or* 11 07 42.3364909752 -77 33 59.394350844   21.9 19.8   15.26 M5.25e 93 0
11 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
12 2MASSW J2224438-015852 BD* 22 24 43.8544128559 -01 58 53.284975671           L4.5V 150 0

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