1998AJ....115.1118D

Query : 1998AJ....115.1118D

1998AJ....115.1118D - Astron. J., 115, 1118-1134 (1998/March-0)

Observations of shocked H_2 and entrained CO in outflows from luminous young stars.

DAVIS C.J., MORIARTY-SCHIEVEN G., EISLOEFFEL J., HOARE M.G. and RAY T.P.

Abstract (from CDS):

Narrowband, H2 (1-0) S(1) images of six luminous outflow regions are presented and discussed. In five of these regions, W75 N, S140 N, NGC 7538, AFGL 5180, and AFGL 490, H2 shock features associated with molecular (CO) outflows are observed. We have discovered faint, though extensive, bow shocks in the W75 N outflow that indicate a total flow length of at least 3 pc. The Herbig-Haro knots that make up the HH 251-254 outflow in S140 N are also observed in H2; in addition, knots in the counterflow are discovered. Copious H2 emission is also observed throughout the NGC 7538 region; filamentary structures to the northeast of the central cluster (IRS 1) are probably photodissociation fronts, although a jetlike structure is observed associated with the IRS 9 CO outflow. In AFGL 5180, a new, collimated H2 jet is discovered to the east of the central cluster, and numerous knots and filaments are observed around the cluster itself that could be associated with the known CO outflow there. Last, H2 line emission is observed southwest of AFGL 490; in particular, a bright peak is found associated with a warm molecular clump in the CO outflow.

To complement these data, wide-field CO J = 2-1 maps have also been obtained toward three regions, W75 N, S140 N, and NGC 7538. When compared with the H2 images, these provide new insight into each outflow region. Indeed, analysis of these data suggests that although these flows are more massive and more energetic than their low-mass counterparts, they are nevertheless well collimated, bipolar, and possibly jet-driven. Molecular bow shocks, driven by an underlying, possibly variable stellar jet, may play a major role in this entrainment process.


Abstract Copyright: ∼

Journal keyword(s): ISM: Jets and Outflows - ISM: Kinematics and Dynamics - Stars: Mass Loss

Nomenclature: HH NNN (Nos 251-254). Table 1, Fig.1: [DME98] AFGL 490 IRS N=1, [DME98] AFGL 490 Knot A N=1. Fig.5: [DME98] S140N ZN (Nos Z1-Z2). Fig.9: [DME98] AFGL 5180 Centre A (Nos A-D), [DME98] AFGL 5180 Centre WN (Nos N, S1, S2). Fig.10: [DME98] AFGL 5180 East A (Nos A-G).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 42

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Number of rows : 42
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 [WBB81] GL437W Y*O 03 07 23.880 +58 30 50.25           ~ 13 0
2 HHL 5 HII 03 07 24.2 +58 30 45           ~ 152 0
3 [WBB81] GL437N Y*O 03 07 24.2530242216 +58 30 54.826982640           ~ 15 0
4 RMS G139.9091+00.1969A Or* 03 07 24.5405054424 +58 30 42.826544352           ~ 18 0
5 LDN 1448 DNe 03 22.5 +30 35           ~ 546 0
6 RAFGL 490 Or* 03 27 38.7928952784 +58 47 00.025298088           ~ 359 0
7 HH 34 HH 05 35 31.30 -06 28 43.0     16     ~ 493 2
8 NAME HH 1-2 HH 05 36 22.8 -06 46 03           ~ 209 1
9 HH 212 HH 05 43 51.41 -01 02 53.1           ~ 443 1
10 HH 26 HH 05 46 05.1 -00 14 17           ~ 100 1
11 HH 25 HH 05 46 06 -00 13.4           ~ 74 0
12 HH 111 HH 05 51 44.207 +02 48 33.87           ~ 418 0
13 HH 121 HH 05 51 46.2 +02 48 32           ~ 39 0
14 NAME AFGL 5180 IRS 1 IR 06 08 53.4 +21 38 29           ~ 11 0
15 RAFGL 5180 SFR 06 08 54.1 +21 38 25           ~ 125 0
16 NAME Mon OB1 G PoC 06 41 12 +09 55.6           ~ 108 0
17 2MASS J18191220-2047297 Y*O 18 19 12.21 -20 47 29.7           B1 137 0
18 [YST88] IRS 2 Y*O 20 38 35.37 +42 37 13.7           ~ 11 0
19 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 423 1
20 [DKS2007] W75N-IRS 1 IR 20 38 36.76 +42 37 29.4           ~ 17 0
21 [YST88] IRS 3 * 20 38 39.1 +42 37 21           ~ 8 0
22 [DSM98] W75N NE ? 20 38 51.0 +42 38 46           ~ 3 0
23 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2541 1
24 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 668 2
25 IRAS 22176+6303 Y*O 22 19 18.23 +63 18 47.5           ~ 600 0
26 [ELM93] Star 1 * 22 19 27.58 +63 33 00.6           ~ 3 0
27 SH 2-140 N HII 22 19 27.7 +63 32 56           ~ 31 0
28 2MASS J22193294+6333161 Y*O 22 19 32.9653651464 +63 33 16.197047784           ~ 5 0
29 HH 251 HH 22 19 34.091 +63 32 55.82           ~ 6 0
30 HH 252 HH 22 19 37.836 +63 32 37.94           ~ 5 0
31 HH 253 HH 22 19 45.237 +63 31 44.17           ~ 5 0
32 HH 254 HH 22 19 49.595 +63 31 15.30           ~ 7 0
33 IRAS 22182+6320 LP* 22 19 52.0187052384 +63 35 32.750847564           ~ 6 0
34 LDN 1204 DNe 22 26.7 +63 15           ~ 88 1
35 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 760 2
36 NAME Cep E HII 23 03 12.779 +61 42 25.75           ~ 183 0
37 NGC 7538 OpC 23 13 37 +61 30.0           ~ 920 1
38 [WBN74] NGC 7538 IRS 11 Y*O 23 13 43.901 +61 26 57.98           ~ 56 0
39 [WBN74] NGC 7538 IRS 1 Y*O 23 13 45.318 +61 28 11.69           ~ 433 3
40 IRAS 23118+6110 Y*O 23 14 02.09473 +61 27 18.8460           ~ 385 0
41 [DSM98] W75N SW ? ~ ~           ~ 3 0
42 NAME HH 251-254 HH ~ ~           ~ 1 0

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