2009AJ....137.3843B

Query : 2009AJ....137.3843B

2009AJ....137.3843B - Astron. J., 137, 3843-3858 (2009/April-0)

Outflows and young stars in Orion's large cometary clouds L1622 and L1634.

BALLY J., WALAWENDER J., REIPURTH B. and MEGEATH S.T.

Abstract (from CDS):

New observations of protostellar outflows associated with young stars in two of Orion's outlying cometary clouds, L1622 and L1634, are presented. The Hα surface brightness of the bright rims are used to argue that both clouds are located at a distance of about 400 pc in the interior of the Orion superbubble where they are illuminated by Orion's massive stars. Spitzer IRAC and MIPS images reveal 28 candidate young stellar objects (YSOs). Combined with the 14 spectroscopically confirmed T Tauri stars, there are at least 34 YSOs in L1622. Narrow-band images have led to the identification of about a dozen shock complexes in L1622. At least six belong to a highly collimated externally irradiated, bipolar jet, HH 963, that is powered by a low-luminosity Class II YSO located outside the projected edge of the L1622 dark cloud. However, the sources of most shocks remain unclear. The Spitzer/IRAC images reveal a compact, highly obscured, S-symmetric outflow brightest in the 4.5 µm images. A faint [S II] counter part, HH 962, is associated with the western end of this flow which appears to be powered by an obscured source in the L1622 cloud interior. The currently identified sample of YSOs implies a star formation efficiency of about 4% for L1622. The L1634 cloud contains nine YSOs and three outflows, including the well known HH 240/241 system. A new flow, HH 979, is powered by the embedded YSO IRS7 in L1634 and crosses the eastern lobe of the HH 240 outflow. Spitzer/IRAC images show 4.5 µm emission indicating molecular shocks from the Herbig-Haro objects closest to IRS 7. A YSO embedded in a condensation located 5' north of HH 240/241 is identified in the Spitzer images. This source drives an irradiated outflow, HH 980, whose lobes emerge into the ionized environment of the Orion-Eridanus superbubble interior. The star formation efficiency of L1634 is estimated to be about 3%.

Abstract Copyright: ∼

Journal keyword(s): ISM: Herbig-Haro objects - ISM: individual (Lynds 1662, Lynds 1634) - ISM: jets and outflows - ISM: kinematics and dynamics - stars: formation

Simbad objects: 68

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Number of rows : 68
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 Eridanus Shell sh 02 17 31 +07 49.6           ~ 52 0
2 NGC 1909 RNe 05 02 -07.9           ~ 37 0
3 * bet Ori s*b 05 14 32.27210 -08 12 05.8981 -0.56 0.10 0.13 0.13 0.15 B8Ia 786 0
4 HH 979NW2 HH 05 19 39.6 -05 48 39           ~ 2 0
5 HH 240A HH 05 19 40.5 -05 51 42           ~ 10 1
6 HH 240 HH 05 19 40.762 -05 51 44.27           ~ 30 0
7 NVSS J051943-055408 rG 05 19 44.075 -05 54 12.90   17.57   19.27   ~ 7 0
8 HH 979NW1 HH 05 19 45.3 -05 50 21           ~ 2 0
9 [BEH2002] VLA 2 Rad 05 19 45.36 -05 52 36.6           ~ 2 0
10 HH 980 HH 05 19 45.6 -05 46 38           ~ 2 0
11 NAME HH 240/241 DNe 05 19 48.9 -05 52 05           ~ 115 1
12 HH 979 HH 05 19 51.6 -05 52 10           ~ 2 0
13 JCMTSF J051951.3-055208 Y*O 05 19 52 -05 52.1           ~ 23 0
14 [BEH2002] VLA 4 Rad 05 19 54.77 -05 55 39.4           ~ 2 0
15 HH 241A HH 05 19 57.0 -05 52 24           ~ 9 0
16 HH 241 HH 05 19 58.248 -05 52 23.52           ~ 16 0
17 HH 241C HH 05 19 58.8 -05 52 36           ~ 3 0
18 [BEH2002] VLA 5 Rad 05 19 58.92 -05 53 49.9           ~ 2 0
19 HH 241D HH 05 20 01.1 -05 52 34           ~ 4 0
20 HD 34835 * 05 20 07.7749297632 -05 50 46.009713984   8.12 8.16     B5III/IV 26 0
21 NAME Barnard's Loop HII 05 27.5 -03 58           ~ 131 1
22 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 281 0
23 NGC 1980 OpC 05 35 15.5 -05 55 46     2.5     ~ 132 0
24 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
25 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
26 Ass Ori OB 1c As* 05 35 21 -05 20.5           ~ 142 1
27 NAME LDN 1641 North HII 05 36 17.6 -06 22 10           ~ 252 0
28 NAME Ori I As* 05 38 -02.8           ~ 653 0
29 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
30 LDN 1641 MoC 05 39.0 -07 00           ~ 502 0
31 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
32 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
33 LDN 1630 DNe 05 45.5 -00 59           ~ 392 0
34 HH 110 HH 05 51 24.929 +02 54 52.28           ~ 92 0
35 HH 111 HH 05 51 44.207 +02 48 33.87           ~ 418 0
36 LDN 1617 DNe 05 51 46 +02 48.5           ~ 62 0
37 2MASS J05525903+0201198 Em* 05 52 59.0322930960 +02 01 19.900526520           ~ 4 0
38 Kiso A-0905 2 Or* 05 53 32.9926517496 +02 17 20.170048488     16.0     ~ 7 0
39 EM* LkHA 334 TT* 05 53 40.9122534576 +01 38 14.009455428   14.81 13.6     K3e 24 0
40 HH 959 HH 05 53 45.0851351184 +01 42 03.367841004           ~ 2 0
41 HH 960 HH 05 53 55.9 +01 41 54           ~ 1 0
42 EM* LkHA 335 TT* 05 53 58.6963216608 +01 44 09.481896024   14.77 14.0     K5e 26 0
43 [OH83] L1622 6 Or* 05 54 01.8914549472 +01 40 27.244864488       15.76 12.67 ~ 12 0
44 [MGM2012] 3459 Or* 05 54 02.0126097504 +01 40 55.865149500         14.68 M 10 0
45 HD 288313 Or* 05 54 02.9907527336 +01 40 21.814523504   10.98 9.95 9.72 9.55 K2V 35 1
46 Kiso A-0905 5 Or* 05 54 07.1845046208 +01 39 00.794156544     16.0     ~ 11 0
47 HH 961 HH 05 54 20.0 +01 48 42           ~ 1 0
48 EM* LkHA 336 Or* 05 54 20.0901545976 +01 42 56.567432448   15.78 14.0     K5e 28 2
49 HH 962 HH 05 54 21.8 +01 44 01           ~ 3 0
50 HH 963NW3 HH 05 54 24.7 +01 47 34           ~ 1 0
51 ZTF J055426.69+015215.6 Or* 05 54 26.6946434184 +01 52 15.557107908           ~ 8 0
52 2MASS J05542696+0152172 Or* 05 54 26.9698183272 +01 52 17.314804020           ~ 6 1
53 LDN 1622 DNe 05 54 28 +01 48.2           ~ 110 0
54 Kiso A-0905 7 Or* 05 54 30.4121352672 +01 50 59.426375964     17.8     K7 10 0
55 EM* LkHA 337 Or* 05 54 37.9436177616 +01 29 51.427532976   14 14.7     ~ 20 0
56 HH 963NW2 HH 05 54 38.6 +01 46 11           ~ 1 0
57 HH 122 HH 05 54 41.3 +01 43 56           ~ 7 0
58 HH 964 HH 05 54 45.5 +01 53 13           ~ 1 0
59 HH 963NW1 HH 05 54 49.2 +01 44 33           ~ 1 0
60 IRAS 05522+0146 Y*O 05 54 53.78 +01 47 09.8           ~ 13 0
61 2MASS J05545694+0142560 Y*O 05 54 56.9561360784 +01 42 56.254222944           ~ 11 0
62 HH 963SE1 HH 05 54 58.0 +01 42 44           ~ 1 0
63 HH 963SE2 HH 05 55 03.5 +01 41 38           ~ 1 0
64 HH 963SE3 HH 05 55 09.1 +01 40 28           ~ 1 0
65 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
66 L 1622-15 TT* 05 57 16.1161272096 +02 29 07.387554804     16.2     M0e 12 0
67 2MASS J05572337+0206369 Em* 05 57 23.3721756792 +02 06 36.927804996           ~ 3 0
68 LDN 1662 DNe 07 28.1 -23 36           ~ 3 0

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