2006ApJ...643..985W

Query : 2006ApJ...643..985W

2006ApJ...643..985W - Astrophys. J., 643, 985-994 (2006/June-1)

A search for optical outflows from brown dwarfs in the Chamaeleon I molecular cloud.

WANG H. and HENNING T.

Abstract (from CDS):

A deep and wide-field HH object survey has been carried out toward the Chamaeleon I (Cha I) molecular cloud with a sky coverage of 1°x2°, which embraces the entire Cha I molecular cloud. In total, 18 HH objects have been detected, including the previously known objects HH 48-51. The newly discovered HH objects are named HH 905-918. The possible exciting sources of the detected HH objects are discussed based on the morphology and locations of the HH objects and on results of previous surveys. Although more than 40 brown dwarfs or brown dwarf candidates have been detected in Cha I, no compelling evidence for optical outflows from brown dwarfs has been found in our images at the detection limit of 2.3x10–20 W.m–2.arcsec–2 (3 σ) in the [S II] λλ6717, 6731 emission. The typical peak brightness of HH objects in Cha I is about 20 times above our detection limit. We conclude that the brightness of optical outflows from substellar objects should be about 20 times lower than that of outflows from young solar-type stars if all the HH objects detected in Cha I are driven by young stars. In three cases–i.e., HH 51, 908, and 909–however, there are hints of a connection between HH objects and the nearby brown dwarfs or very low mass stars.

Abstract Copyright: ∼

Journal keyword(s): ISM: Herbig-Haro Objects - ISM: Individual: Name: Chamaeleon I - ISM: Jets and Outflows - Stars: Formation - Stars: Low-Mass, Brown Dwarfs

CDS comments: Fig.11: star S = 2MASS J00065908+8951053

Simbad objects: 89

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Number of rows : 89
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 2MASS J00065908+8951053 * 00 06 46.2582739872 +89 51 05.698446372           ~ 1 0
2 LDN 1617 DNe 05 51 46 +02 48.5           ~ 62 0
3 ESO-HA 554 LM* 11 01 32.0371795464 -77 18 25.073955180         17.79 M8.5e 18 0
4 ESO-HA 555 Y*O 11 02 15.52296 -77 10 59.4012         15.07 M3.5Ve 6 0
5 HH 905A HH 11 02 42.4 -77 16 41           ~ 1 0
6 HH 905 HH 11 02 42.4 -77 16 40           ~ 2 0
7 HH 905B HH 11 02 52.2 -77 16 56           ~ 1 0
8 ESO-HA 556 Y*O 11 02 53.4703055088 -77 17 10.282478352           M4.5V 2 0
9 [LM99] DC 2971-161-2 cor 11 02 57.3 -77 49 06           ~ 2 0
10 HH 905C HH 11 02 57.3 -77 16 57           ~ 1 0
11 IRAS 11030-7702 TT* 11 04 22.7159038128 -77 18 08.299910700     17.89     K6/M0e 75 0
12 HH 48 HH 11 04 22.8 -77 18 08           ~ 50 0
13 [RSD2012] 8 TT* 11 04 22.998 -77 18 07.56     21.3     ~ 4 0
14 HH 50 HH 11 05 49.6 -77 33 10           ~ 31 0
15 HH 50H HH 11 05 51.4 -77 32 27           ~ 1 0
16 HH 50G HH 11 05 52.5 -77 33 15           ~ 1 0
17 HH 50I HH 11 05 55.5 -77 31 54           ~ 1 0
18 HH 50J HH 11 05 55.8 -77 31 27           ~ 1 0
19 HH 49 HH 11 06 00.05 -77 33 36.0           ~ 34 0
20 HH 50F HH 11 06 05.9 -77 33 08           ~ 1 0
21 HH 50K HH 11 06 08.9 -77 31 38           ~ 1 0
22 HH 906 HH 11 06 11.1 -77 28 55           ~ 2 0
23 HH 907A HH 11 06 18.4 -78 24 22           ~ 1 0
24 HH 907B HH 11 06 20.0 -78 24 19           ~ 1 0
25 HH 907C HH 11 06 22.2 -78 24 29           ~ 1 0
26 IRAS 11051-7706 Y*O 11 06 46.025 -77 22 29.67           ~ 101 0
27 [PMG2001] NIR 76 Y*? 11 06 46.580 -77 22 32.56           ~ 58 0
28 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
29 2MASS J11073832-7747168 Or* 11 07 38.3094558336 -77 47 16.742658084     18.37 16.72 14.53 M5e 26 0
30 NAME Cha I South reg 11 07 44 -77 34.8           ~ 12 0
31 DENIS J1107.9-7743 Y*O 11 07 55.2660479448 -77 43 55.319983176           ~ 3 0
32 RX J1108.2-7728 Y*O 11 07 55.775088 -77 27 25.52724   15.26 13.40 13.07 11.04 K3Ve 59 0
33 Sz 23 Or* 11 07 58.0951794888 -77 42 41.352365124   15.8 18.04   14.63 M4Ve 79 0
34 HH 908 HH 11 07 59.6 -77 47 43           ~ 3 0
35 V* VW Cha Or* 11 08 01.502064 -77 42 28.87524 13.91 14.165 12.761 12.653 10.69 K7+M0 202 0
36 Ass Cha T 1-19 Or* 11 08 16.4948745984 -77 44 37.199315580   18.40 16.53   13.12 M4Ve 61 0
37 2MASS J11081703-7744118 Or* 11 08 17.0491254960 -77 44 11.866411824   20.4 18.51   14.34 M5.5e 39 0
38 [NC98] Cha HA 5 Or* 11 08 24.1193575992 -77 41 47.438803392   21.3 19.18   14.85 M5.5e 60 0
39 HH 909A HH 11 08 28.9 -77 43 49           ~ 3 0
40 HH 910 HH 11 08 29.1 -77 51 53           ~ 2 0
41 HH 911B HH 11 08 31.2 -77 27 12           ~ 1 0
42 HH 911A HH 11 08 31.2 -77 26 55           ~ 1 0
43 HH 911C HH 11 08 31.7 -77 27 15           ~ 1 0
44 HH 909B HH 11 08 31.9 -77 43 51           ~ 2 0
45 NAME Cha IR Nebula TT* 11 08 38.702 -77 43 51.54           M5.5 73 0
46 V* HR Cha Or* 11 08 54.1972860288 -77 32 11.656356468     19.1   15.01 M5.25e 48 0
47 [CCE98] 2-35 Y*O 11 08 56.73 -77 43 28.5           ~ 6 0
48 HH 912 HH 11 09 02.8 -76 35 19           ~ 3 0
49 OTS 7 Y*O 11 09 15.7 -76 36 43           ~ 6 0
50 [GPM2004] B1 PoC 11 09 21.6 -76 34 19           ~ 3 0
51 [GPM2004] A PoC 11 09 22.4 -76 33 33           ~ 3 0
52 V* HV Cha Or* 11 09 22.6489972128 -76 34 32.164757616         16.79 M0.75-M1.75 55 0
53 [CCE98] 2-39 Y*O 11 09 22.9433142888 -76 31 13.431276300           ~ 6 0
54 [GPM2004] B2 PoC 11 09 23.3 -76 34 48           ~ 3 0
55 V* VZ Cha Or* 11 09 23.7739008528 -76 23 20.857480836   13.82 12.94   12.14 K7e 162 0
56 OTS 11 Y*O 11 09 24.1 -76 34 57           ~ 6 0
57 V* GM Cha Or* 11 09 28.55424 -76 33 28.1376           M3.5-M6.5 56 0
58 HJM C 1-20 * 11 09 32.4664036296 -76 30 37.492848792         16.42 ~ 4 0
59 OTS 17 * 11 09 34.4 -76 32 34           ~ 2 0
60 HJM C 1-22 Y*O 11 09 47.72 -76 34 06.0           ~ 8 0
61 [GPM2004] C1 PoC 11 09 48.9 -76 33 59           ~ 3 0
62 [GPM2004] D PoC 11 09 49.6 -76 34 38           ~ 3 0
63 HH 913 HH 11 09 50.0 -76 30 57           ~ 2 0
64 Ced 112 RNe 11 09 52.4 -76 36 57           ~ 32 0
65 Ass Cha T 1-23 Or* 11 09 53.4189070920 -76 34 25.652641116   13.9 19.50 15.10 13.52 G9IIIe 100 0
66 HH 914 HH 11 09 53.8 -76 34 25           ~ 3 0
67 V* HY Cha Or* 11 09 54.3714582264 -76 31 11.437434660     21.6   17.27 M1.75e 28 0
68 HH 51 HH 11 09 55.0 -76 24 19           ~ 13 0
69 V* WW Cha TT* 11 10 00.0802739160 -76 34 57.963853416   14.74 14.10   10.95 ~ 165 0
70 HJM C 1-4 Or* 11 10 03.6830951520 -76 33 29.218685616     18.78 16.1 14.72 K8e 69 0
71 OTS 42 * 11 10 09.3308668680 -76 35 06.424623924           ~ 5 0
72 OTS 44 Y*O 11 10 09.34392 -76 32 17.8512           M9.5+ 70 0
73 HH 915 HH 11 10 09.496 -76 35 06.05           ~ 6 0
74 OTS 48 IR 11 10 16.4 -76 34 31           ~ 5 0
75 HH 916A HH 11 10 22.2 -76 33 29           ~ 1 0
76 CHXX 16 LM* 11 10 22.2523149192 -76 25 13.841167332         16.58 M8.0 42 0
77 HH 916B HH 11 10 23.3 -76 33 28           ~ 1 0
78 HH 916C HH 11 10 25.3 -76 33 27           ~ 1 0
79 HH 917 HH 11 10 28.1 -76 34 46           ~ 3 0
80 2MASS J11104290-7634048 Y*O 11 10 42.90000 -76 34 04.8036           M0- 5 0
81 HH 918B HH 11 13 09.1 -77 44 18           ~ 1 0
82 HH 918 HH 11 13 09.8 -77 44 15           ~ 2 0
83 HH 918A HH 11 13 10.5 -77 44 14           ~ 1 0
84 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
85 HH 909 HH ~ ~           ~ 3 0
86 HH 51C HH ~ ~           ~ 1 0
87 HH 51B HH ~ ~           ~ 1 0
88 HH 51A HH ~ ~           ~ 1 0
89 HH 907 HH ~ ~           ~ 1 0

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