2002A&A...382.1021D


Query : 2002A&A...382.1021D

2002A&A...382.1021D - Astronomy and Astrophysics, volume 382, 1021-1031 (2002/2-2)

Near-infrared Fabry-Perot imaging of Herbig-Haro energy sources: Collimated, small-scale H2 jets and wide-angled winds.

DAVIS C.J., STERN L., RAY T.P. and CHRYSOSTOMOU A.

Abstract (from CDS):

To search for further evidence of H2 line emission towards the central engines of Herbig-Haro (HH) flows we have obtained near-infrared Fabry-Perot images of eight Class I outflow sources (SVS13 [HH7-11], L1551-IRS5, HH26-IRS, HH72-IRS, SSV63E [HH24C], SSV63W [HH24J], HH34-IRS and HH111-IRS) and two Class 0 sources (HH24-MMS and HH25-MMS). Elongated H2 emission (on scales of a few arcseconds) is detected from four of the Class I YSOs. These small-scale ``jets'' are associated with the base of more extended, parsec-scale HH outflows (and the ``Molecular Hydrogen Emission Line'' regions, or MHELs, discussed in Davis et al., 2001MNRAS.326..524D). In L1551-IRS5 we detect two jet components in H2; these may be the molecular counterparts of the two known optical jets from this binary protostellar system, or they may represent H2 excitation along the walls of a narrow, edge-brightened cavity. In addition to the small-scale MHEL jets, analysis of the data also suggests the presence of discrete molecular shock fronts formed along the jet axes close to the energy sources. In the most clear-cut example, SVS13, we see an H2 knot at a distance of about 440AU from the outflow source; assuming a flow velocity of ∼200km/s, then the dynamical age of this molecular feature is only 10yrs. In these data we also see evidence for both collimated jets and wide-angled winds from the same sources. Indeed, even in one of the two Class 0 sources, HH25MMS, a poorly-collimated flow component seems to be present. A two-component wind model may therefore be appropriate for outflows from Class I (and possibly even Class 0) protostars.

Abstract Copyright:

Journal keyword(s): interstellar medium: jets and outflows - stars: pre-main-sequence - Herbig-Haro objects

Simbad objects: 34

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Number of rows : 34
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HH 195 HH 03 25 14.9 +30 47 00           ~ 9 0
2 SSTc2d J032536.4+304522 Y*O 03 25 36.49 +30 45 22.2           ~ 192 1
3 LDN 1448NA smm 03 25 36.49 +30 45 22.2           ~ 179 1
4 IRAS 03225+3034 IR 03 25 36.49 +30 45 22.2           ~ 155 1
5 V* V512 Per Or* 03 29 03.7578170808 +31 16 03.947525688           ~ 367 0
6 HH 11B HH 03 29 04.54 +31 15 51.7           ~ 9 0
7 HH 10 HH 03 29 05.456 +31 15 45.32           ~ 139 1
8 ASR 6 Y*O 03 29 06.425 +31 15 34.86           ~ 155 1
9 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 834 0
10 V* V801 Ori Or* 05 35 26.8302324384 -06 26 47.614496064     14.901   13.225 M0 81 1
11 2MASS J05352984-0626583 Y*O 05 35 29.8502549712 -06 26 58.334492688         18.18 ~ 96 0
12 HH 34 HH 05 35 31.30 -06 28 43.0     16     ~ 477 2
13 HH 1 HH 05 36 20.8 -06 45 13           ~ 404 1
14 BD-06 1253 Ae* 05 36 25.4320468080 -06 42 57.684730284   11.65 10.9 10.29   A1e 423 1
15 HH 212 HH 05 43 51.41 -01 02 53.1           ~ 333 1
16 2MASS J05460363-0014493 Y*O 05 46 03.63 -00 14 49.3           ~ 54 0
17 HH 26A HH 05 46 05.0 -00 14 38           ~ 12 0
18 HH 24C HH 05 46 07.69 -00 09 40.3           ~ 23 0
19 NAME HH 25MMS Y*O 05 46 07.8 -00 13 41           ~ 58 0
20 2MASS J05460787-0010014 Y*O 05 46 07.873 -00 10 01.41           ~ 28 0
21 HH 24B HH 05 46 07.97 -00 10 05.5           ~ 10 0
22 IRAS 05435-0011 Y*O 05 46 08.45544 -00 10 02.9568           ~ 79 0
23 HGBS J054608.3-001044 Y*O 05 46 08.8 -00 10 47           ~ 90 0
24 HH 111 HH 05 51 44.2 +02 48 34           ~ 397 0
25 HGBS J055146.1+024829 Y*O 05 51 46.3 +02 48 28           ~ 81 0
26 NAME HH 999-IRS Y*O 06 07 08.500 -11 17 51.23           ~ 16 0
27 JCMTSF J072007.9-240226 IR 07 20 08 -24 02.4           ~ 25 0
28 Ced 96 Y*O 07 20 10.3 -24 02 24           ~ 30 1
29 NAME HH 46-47 HH 08 25 43.6 -51 00 36           ~ 189 2
30 LDN 483 DNe 18 17 35 -04 39.8           ~ 259 0
31 V* V645 Cyg Ae* 21 39 58.2745507632 +50 14 21.042184668   14.23 13.10 13.82   O6/9eq 261 0
32 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 719 2
33 EM* MWC 1080 Ae* 23 17 25.5895018656 +60 50 43.444557384   13.24 11.542     B0eq 315 0
34 HH 24J HH ~ ~           ~ 7 0

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2022.05.28-09:23:01

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