2002ApJ...564..839L

Query : 2002ApJ...564..839L

2002ApJ...564..839L - Astrophys. J., 564, 839-852 (2002/January-2)

Near-infrared H2 and [Fe II] imaging and spectroscopy of new jets in the Vela molecular clouds.

LORENZETTI D., GIANNINI T., VITALI F., MASSI F. and NISINI B.

Abstract (from CDS):

We present narrowband imaging in the 2.122 µm transition of H2 and in the 1.644 µm transition of [Fe II] of a sample of 12 protostellar candidates and three Herbig-Haro (HH) objects belonging to the Vela molecular ridge (VMR). Out of the 15 investigated fields, we detected H2 emission in IRS 63, 17, 19, 21, and 8 (according to our catalog), while [Fe II] was observed toward only one source (IRS 8), where a counterjet has been identified for the first time. H2 and [Fe II] images have been combined to trace the different shock conditions along this jet. In addition, a new pure molecular H2 jet was discovered in IRS 17, which results in about 20 knots of emission extending up to 0.3 pc from the central driving source. IR spectroscopy (1.55-2.55 µm) at a resolution of ~600 of the most prominent knots has revealed a large number of H2 emission lines, which were used to evaluate both the extinction and the excitation temperature along the flow. The observed increase of the excitation temperature with the distance from the central source was interpreted as being due to a decrease of the flow velocity with time or, alternatively, to the fact that internal knots travel in a medium already put into motion by previous shock events. Comparisons with model predictions indicate nondissociative C-shocks as the most likely mechanism for line excitation. Finally, the presence of a common alignment of the detected flows with the Galactic plane indicates that the Galactic B field affects the star formation on large scales in VMR.

Abstract Copyright: ∼

Journal keyword(s): Infrared: Stars - ISM: Individual: Name: Vela Molecular Clouds - ISM: Jets and Outflows - Stars: Formation - Stars: Pre-Main-Sequence

Nomenclature: Table 3: [LGV2002] IRS 63 WW (Nos NE, SW), [LGV2002] IRS 17 AN (Nos A-K, A1-A3, B1-B2, C1-C5, E1-E3, G1-G5), [LGV2002] IRS 17 W (Nos E, W), [LGV2002] IRS 20 W (Nos N, S). Table 4: [LGV2002] IRS 8 AN (Nos B1-B7, R1-R6). Text: <%M [LGV2002] IRS 8 WW) (Nos SE, NW).

Simbad objects: 74

goto Full paper

goto View the references in ADS

Number of rows : 74
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 NAME GUM Nebula ISM 07 43 -42.1           ~ 454 1
2 HH 120 HH 08 09 32.6 -36 04 55           ~ 59 0
3 CG 30 CGb 08 09 32.8 -36 05 00           ~ 136 0
4 [LGV2002] IRS 8 R3 PoC 08 22 50.6 -42 07 24           ~ 1 0
5 [LGV2002] IRS 8 R2 PoC 08 22 50.6 -42 07 23           ~ 1 0
6 [LGV2002] IRS 8 R4 PoC 08 22 50.7 -42 07 28           ~ 1 0
7 [LGV2002] IRS 8 R1 PoC 08 22 50.7 -42 07 27           ~ 1 0
8 [LGV2002] IRS 8 R5 PoC 08 22 50.9 -42 07 25           ~ 1 0
9 [LGV2002] IRS 8 R6 PoC 08 22 51.0 -42 07 28           ~ 1 0
10 [LGV2002] IRS 8 NW PoC 08 22 51 -42 07.4           ~ 1 1
11 IRAS 08211-4158 SFR 08 22 52.3 -42 07 57           ~ 26 0
12 [LGV2002] IRS 8 B1 PoC 08 22 53.7 -42 08 53           ~ 2 0
13 [LGV2002] IRS 8 B5 PoC 08 22 53.9 -42 08 45           ~ 2 0
14 [LGV2002] IRS 8 B7 PoC 08 22 53.9 -42 08 36           ~ 2 0
15 HH 219 HH 08 22 54.044 -42 08 47.19           ~ 9 1
16 [LGV2002] IRS 8 B2 PoC 08 22 54.2 -42 08 50           ~ 2 0
17 [LGV2002] IRS 8 B3 PoC 08 22 54.2 -42 08 49           ~ 2 0
18 [LGV2002] IRS 8 B4 PoC 08 22 54.2 -42 08 48           ~ 2 0
19 [LGV2002] IRS 8 B6 PoC 08 22 54.2 -42 08 42           ~ 2 0
20 NAME HH 46-47 HH 08 25 43.6 -51 00 36           ~ 216 2
21 NAME ESO 210-6A CGb 08 25.8 -51 02           ~ 15 1
22 IRAS 08328-4314 IR 08 34 34.2 -43 24 38           ~ 5 0
23 NAME Vela-D Molecular Cloud MoC 08 39 -41.0           ~ 52 0
24 IRAS 08375-4109 HII 08 39 20.4 -41 19 53           ~ 18 0
25 [MGL99] IRS 63 21 * 08 41 14.24 -40 52 16.9           ~ 3 1
26 IRAS 08393-4041 MIR 08 41 14.76216 -40 52 11.0784           ~ 16 1
27 [MGL99] IRS 63 22 Y*? 08 41 15.17 -40 52 16.3           ~ 3 0
28 [LGV2002] IRS 63 SW PoC 08 41 15.2 -40 52 16           ~ 1 0
29 [LGV2002] IRS 63 NE PoC 08 41 15.2 -40 52 16           ~ 1 0
30 ESO-HA 161 Ae* 08 42 16.5851692368 -40 44 09.961637460   15.98 14.69 14.71   ~ 32 0
31 IRAS 08429-4055 Y*? 08 44 47.77 -41 06 58.0           ~ 6 0
32 IRAS 08445-4420 cor 08 46 20.5 -44 31 22           ~ 9 0
33 [LGV2002] IRS 17 A1 PoC 08 46 30.6 -43 53 12           ~ 4 0
34 [LGV2002] IRS 17 A2 PoC 08 46 31.0 -43 53 17           ~ 4 0
35 [LGV2002] IRS 17 A3 PoC 08 46 31.4 -43 53 22           ~ 4 0
36 [LGV2002] IRS 17 B2 PoC 08 46 31.7 -43 53 47           ~ 4 0
37 [LGV2002] IRS 17 B1 PoC 08 46 31.8 -43 53 45           ~ 4 0
38 [LGV2002] IRS 17 E1 PoC 08 46 31.9 -43 54 30           ~ 3 0
39 [LGV2002] IRS 17 E2 PoC 08 46 32.2 -43 54 32           ~ 3 0
40 [LGV2002] IRS 17 E3 PoC 08 46 32.3 -43 54 33           ~ 3 0
41 [LGV2002] IRS 17 C3 PoC 08 46 32.5 -43 54 10           ~ 4 0
42 [LGV2002] IRS 17 C1 PoC 08 46 32.5 -43 54 05           ~ 3 0
43 [LGV2002] IRS 17 C2 PoC 08 46 32.7 -43 54 12           ~ 4 0
44 [LGV2002] IRS 17 C4 PoC 08 46 32.8 -43 54 15           ~ 3 0
45 [LGV2002] IRS 17 C5 PoC 08 46 32.9 -43 54 19           ~ 4 0
46 [LGV2002] IRS 17 D PoC 08 46 33.1 -43 54 31           ~ 3 0
47 [MGL99] IRS 17 40 * 08 46 33.40 -43 54 38.9           ~ 7 0
48 [LGV2002] IRS 17 F PoC 08 46 33.8 -43 54 43           ~ 3 0
49 IRAS 08448-4343 cor 08 46 33.8 -43 54 33           ~ 73 1
50 [LGV2002] IRS 17 W PoC 08 46 34.6 -43 54 27           ~ 2 0
51 [MGL99] IRS 17 57 * 08 46 34.76 -43 54 30.5           ~ 7 0
52 [LGV2002] IRS 17 H PoC 08 46 34.8 -43 55 13           ~ 3 0
53 [LGV2002] IRS 17 G4 PoC 08 46 35.3 -43 55 07           ~ 3 0
54 [LGV2002] IRS 17 G1 PoC 08 46 35.3 -43 55 01           ~ 5 0
55 [LGV2002] IRS 17 G2 PoC 08 46 35.4 -43 55 03           ~ 4 0
56 [LGV2002] IRS 17 E PoC 08 46 35.4 -43 54 23           ~ 1 1
57 [LGV2002] IRS 17 G5 PoC 08 46 35.5 -43 55 11           ~ 4 0
58 [LGV2002] IRS 17 G3 PoC 08 46 35.5 -43 55 08           ~ 4 0
59 [LGV2002] IRS 17 I PoC 08 46 35.6 -43 55 20           ~ 2 0
60 [LGV2002] IRS 17 J2 PoC 08 46 35.9 -43 55 59           ~ 2 0
61 [LGV2002] IRS 17 J1 PoC 08 46 36.1 -43 55 57           ~ 2 0
62 [LGV2002] IRS 17 K PoC 08 46 36.4 -43 56 06           ~ 1 0
63 PN K 2-15 HII 08 48 39.0553841664 -42 53 54.005736984   12.86 12.01 11.72 10.79 B0V 67 2
64 IRAS 08470-4321 cor 08 48 48.2 -43 32 25           ~ 47 0
65 [MGL99] IRS 19 64 * 08 48 53.43 -43 32 20.4           ~ 2 0
66 [LGV2002] IRS 20 S PoC 08 49 25.6 -43 16 15           ~ 1 0
67 [LGV2002] IRS 20 N PoC 08 49 25.8 -43 16 09           ~ 1 0
68 IRAS 08476-4306 cor 08 49 25.9 -43 17 10           ~ 28 0
69 IRAS 08477-4359 cor 08 49 32.3 -44 10 46           ~ 21 0
70 IRAS 08500-4254 cor 08 51 49.2269863104 -43 05 30.585608412           ~ 10 0
71 NAME VELA MOL RIDGE MoC 08 53 -45.0           ~ 178 0
72 NAME Vela C Cld 08 57 -43.2           ~ 193 0
73 HH 74 HH 09 02 15.8 -44 49 52           ~ 10 0
74 HH 75 HH 09 11 38.5 -45 42 28           ~ 20 0

To bookmark this query, right click on this link: simbad:objects in 2002ApJ...564..839L and select 'bookmark this link' or equivalent in the popup menu