2007A&A...466..579G


Query : 2007A&A...466..579G

2007A&A...466..579G - Astronomy and Astrophysics, volume 466, 579-587 (2007/5-1)

Herbig-Haro flows in L1641N.

GALFALK M. and OLOFSSON G.

Abstract (from CDS):

To study the Herbig-Haro (HH) flows in L1641N, an active star formation region in the southern part of the Orion GMC and one of the most densely populated regions of HH objects in the entire sky. By mapping the velocities of these HH objects, combined with mid-IR observations of the young stars, the major flows in the region and the corresponding outflow sources can be revealed. We have used the 2.56m Nordic Optical Telescope (NOT) to observe two deep fields in L1641N, selected on the basis of previous shock studies, using the 2.12µm transition of H2 (and a KS filter to sample the continuum) for a total exposure time of 4.6h (72min KS) in the overlapping region. The resulting high-resolution mosaic (0.23'' pixel size, 0.75'' seeing) shows numerous new shocks and resolves many known shocks into multiple components. Using previous observations taken 9 yr earlier we calculate a proper motion map and combine this with Spitzer 24µm observations of the embedded young stars. The combined H2 mosaic shows many new shocks and faint structures in the HH flows. From the proper motion map we find that most HH objects belong to two major bi-polar HH flows, the large-scale roughly North-South oriented flow from central L1641N and a previously unseen HH flow in eastern L1641N. Combining the tangential velocity map with the mid-IR Spitzer images, two very likely outflow sources are found. The outflow source of the eastern flow, L1641N-172, is found to be the currently brightest mid-IR source in L1641N and seem to have brightened considerably during the past 20yr. We make the first detection of this source in the near-IR (KS) and also find a near-IR reflection nebula pointing at the source, probably the illuminated walls of a cone-shaped cavity cleared out by the eastern lobe of the outflow. Extending a line from the eastern outflow source along the proper motion vector we find that HH 301 and HH 302 (almost 1pc away) belong to this new HH flow.

Abstract Copyright:

Journal keyword(s): ISM: jets and outflows - infrared: ISM - stars: formation - ISM: individual objects: L1641N

Nomenclature: Fig.1, Table 1: SMZ 5-NNA, SMZ 5-NNAN, SMZ 5-NNANA, N=18+21+18 added.

CDS comments: Fig.3, Table 2: Objects are [GO2008] NNN in SIMBAD.

Simbad objects: 88

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Number of rows : 88
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 HH 299 HH 05 36 10.0 -06 19 58           ~ 7 0
2 Parenago 2354 Y*O 05 36 10.4378267832 -06 20 01.537653840   15.16 14.244   12.782 K3 20 0
3 HH 61 HH 05 36 12.8 -07 07 02           ~ 13 0
4 NAME LDN 1641 North HII 05 36 17.6 -06 22 10           ~ 231 0
5 2MASS J05361788-0622280 Y*O 05 36 17.888 -06 22 28.07           ~ 11 0
6 HH 303 HH 05 36 18.2 -06 19 47           ~ 7 0
7 [FKV2013] 571 Y*O 05 36 18.47 -06 22 13.4           ~ 5 0
8 V* V832 Ori Or* 05 36 18.4801435704 -06 20 38.754371328     14.52   13.495 M0 34 0
9 HOPS 182 Y*O 05 36 18.83 -06 22 10.2           ~ 16 0
10 [KSP2003] J053619.56-062215.2 IR 05 36 19.56 -06 22 15.2           ~ 5 0
11 2MASS J05361970-0622129 Y*O 05 36 19.701 -06 22 12.95           ~ 10 0
12 SMZ 14A1 PoC 05 36 21.3 -06 21 39           ~ 3 0
13 HH 298 HH 05 36 21.7 -06 21 52           ~ 4 0
14 HH 298A HH 05 36 21.7 -06 21 51           ~ 4 0
15 2MASS J05362187-0623299 Y*O 05 36 21.8781306672 -06 23 29.933756052           M1 29 0
16 SMZ 16B PoC 05 36 23.2 -06 22 48           ~ 2 0
17 HOPS 178 Y*O 05 36 24.61 -06 22 41.3           ~ 22 0
18 [CTS93] N 23 IR 05 36 26.2 -06 22 39           ~ 3 0
19 SMZ 16A PoC 05 36 26.6 -06 22 41           ~ 2 0
20 SMZ 20 PoC 05 36 29.7 -06 24 29           ~ 3 0
21 HH 301 HH 05 36 37.8 -06 21 26           ~ 10 0
22 HH 302 HH 05 36 48.6 -06 20 40           ~ 9 0
23 NAME Ori A MoC 05 38 -07.1           ~ 2896 0
24 LDN 1641 MoC 05 39.0 -07 00           ~ 466 0
25 LDN 1630 DNe 05 45.5 -00 59           ~ 373 0
26 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1025 1
27 HH 23G HH 07 25.2 -24 28           ~ 9 0
28 SMZ 5-14A3 PoC ~ ~           ~ 1 0
29 SMZ 5-14B1 PoC ~ ~           ~ 1 0
30 SMZ 5-14M2 PoC ~ ~           ~ 1 0
31 SMZ 5-14Q PoC ~ ~           ~ 1 0
32 SMZ 9B PoC ~ ~           ~ 2 0
33 SMZ 5-16C PoC ~ ~           ~ 1 0
34 SMZ 5-14F2 PoC ~ ~           ~ 1 0
35 SMZ 5-16E PoC ~ ~           ~ 1 0
36 SMZ 5-14B2 PoC ~ ~           ~ 1 0
37 SMZ 5-14H2 PoC ~ ~           ~ 1 0
38 SMZ 5-14N3 PoC ~ ~           ~ 1 0
39 HH 23A HH ~ ~           ~ 3 0
40 SMZ 5-16D PoC ~ ~           ~ 1 0
41 SMZ 5-14H1 PoC ~ ~           ~ 1 0
42 SMZ 5-14N1 PoC ~ ~           ~ 1 0
43 SMZ 14F PoC ~ ~           ~ 2 0
44 SMZ 5-14F1 PoC ~ ~           ~ 1 0
45 SMZ 5-14N4 PoC ~ ~           ~ 1 0
46 SMZ 5-14S PoC ~ ~           ~ 1 0
47 HH 298B HH ~ ~           ~ 2 0
48 SMZ 5-14M3 PoC ~ ~           ~ 1 0
49 SMZ 5-14B3 PoC ~ ~           ~ 1 0
50 SMZ 15A PoC ~ ~           ~ 2 0
51 SMZ 5-15B2 PoC ~ ~           ~ 1 0
52 SMZ 5-20B PoC ~ ~           ~ 1 0
53 SMZ 5-20D PoC ~ ~           ~ 1 0
54 SMZ 5-14G1 PoC ~ ~           ~ 1 0
55 SMZ 5-14N2 PoC ~ ~           ~ 1 0
56 SMZ 5-14T PoC ~ ~           ~ 1 0
57 SMZ 15C PoC ~ ~           ~ 2 0
58 SMZ 5-15E PoC ~ ~           ~ 1 0
59 SMZ 14G PoC ~ ~           ~ 2 0
60 HH 23D HH ~ ~           ~ 2 0
61 HH 23E HH ~ ~           ~ 2 0
62 SMZ 9A PoC ~ ~           ~ 2 0
63 SMZ 5-14K3 PoC ~ ~           ~ 1 0
64 SMZ 5-14V PoC ~ ~           ~ 1 0
65 SMZ 5-16F PoC ~ ~           ~ 1 0
66 SMZ 14A2 PoC ~ ~           ~ 2 0
67 SMZ 14E2 PoC ~ ~           ~ 2 0
68 SMZ 5-14U PoC ~ ~           ~ 1 0
69 SMZ 5-15D PoC ~ ~           ~ 1 0
70 SMZ 5-20A PoC ~ ~           ~ 1 0
71 SMZ 5-20C PoC ~ ~           ~ 1 0
72 SMZ 5-20E PoC ~ ~           ~ 1 0
73 SMZ 5-14A4 PoC ~ ~           ~ 1 0
74 SMZ 14D3 PoC ~ ~           ~ 2 0
75 SMZ 14D1 PoC ~ ~           ~ 2 0
76 SMZ 5-14M1 PoC ~ ~           ~ 1 0
77 HH 23F HH ~ ~           ~ 2 0
78 SMZ 14E1 PoC ~ ~           ~ 2 0
79 SMZ 5-14R PoC ~ ~           ~ 1 0
80 SMZ 8B PoC ~ ~           ~ 2 0
81 HH 23B HH ~ ~           ~ 3 0
82 SMZ 14D2 PoC ~ ~           ~ 2 0
83 SMZ 8A PoC ~ ~           ~ 2 0
84 SMZ 5-15B1 PoC ~ ~           ~ 1 0
85 SMZ 14L PoC ~ ~           ~ 2 0
86 SMZ 5-14O PoC ~ ~           ~ 1 0
87 SMZ 5-8A1 PoC ~ ~           ~ 1 0
88 HH 298C HH ~ ~           ~ 2 0

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2023.02.01-08:05:51

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