2003MNRAS.339..524S


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.23CEST03:45:17

2003MNRAS.339..524S - Mon. Not. R. Astron. Soc., 339, 524-536 (2003/February-3)

Anatomy of the Herbig-Haro object HH7 bow shock.

SMITH M.D., KHANZADYAN T. and DAVIS C.J.

Abstract (from CDS):

We perform a detailed shock diagnosis of the Herbig-Haro object HH7, a well-defined bow shock from a protostellar outflow. We first present molecular hydrogen images in the 2-1 S(1) and 1-0 S(1) K -band emission lines. We then introduce revised models for magneto-hydrodynamic bow shocks that incorporate a limited C and O chemistry and account for the shock thickness. We employ these models to interpret the new images as well as ISO data, the line profile, H2position-velocity diagram, optical images and the proper motion. This yields a C-shock model that satisfies the constraints, confirming that ambipolar diffusion is the linchpin in the shock physics. The best model is a slow-moving paraboloidal bow of speed 55 km/s, with a pre-shock density of 8x103/cm3 and an H2/H number ratio of just 0.25. The bow moves at an angle of ∼30° to the line of sight and at a position angle of ∼95° in the plane of the sky rather than along the outflow axis of ∼123°. The bow model also predicts the observed low line emission from H2O, without the need for gas-phase depletion. Predictions for imaging and spectroscopy at far-infrared wavelengths, employing the 63-µm [Oi] line, are presented.

Abstract Copyright: RAS

Journal keyword(s): ISM: Herbig - Haro objects - ISM: individual: HH7 - ISM: jets and outflows - ISM: lines and bands - ISM: structure

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HH 11 HH 03 29 03 +31 15.8           ~ 151 1
2 V* V512 Per Or* 03 29 03.7567945196 +31 16 03.959183877           ~ 361 0
3 HH 10 HH 03 29 05.456 +31 15 45.32           ~ 139 1
4 ASR 6 Y*O 03 29 06.425 +31 15 34.86           ~ 155 1
5 HH 9 HH 03 29 06.5 +31 15 53           ~ 107 1
6 HH 7C HH 03 29 07.8 +31 15 26           ~ 7 0
7 HH 7B HH 03 29 08.11 +31 15 28.5           ~ 11 0
8 HH 7D HH 03 29 08.3 +31 15 29           ~ 5 0
9 HH 7A HH 03 29 08.33 +31 15 29.1           ~ 13 0
10 2MASS J03290842+3115284 NIR 03 29 08.420 +31 15 28.48           ~ 226 1
11 HH 43 HH 05 38 10.4 -07 09 25           ~ 99 0
12 HH 91A HH 05 41 58.2 -01 13 37           ~ 12 0
13 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 387 0
14 HH 99B HH 19 02 05.61 -36 54 35.0           ~ 19 0
15 HH 7F HH ~ ~           ~ 4 0
16 HH 7E HH ~ ~           ~ 3 0
17 HH 7G HH ~ ~           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2021.06.23-03:45:17

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