2004A&A...413..593R


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET13:03:30

2004A&A...413..593R - Astronomy and Astrophysics, volume 413, 593-607 (2004/1-2)

Numerical simulations of highly collimated protostellar outflows. The effects of relative density.

ROSEN A. and SMITH M.D.

Abstract (from CDS):

We present three-dimensional hydrodynamic simulations of jets as a model for protostellar outflows. We investigate molecular jets which are initially heavier, equal or lighter than a uniform ambient molecular medium, as well as a ballistic atomic jet, with the aim of distinguishing the resulting structures and relating them to various proposed protostellar evolutionary stages. We modify the ZEUS numerical code, to include time-dependent molecular hydrogen chemistry, a limited equilibrium C and O chemistry, and a detailed cooling function. We find highly focussed and accelerated flow patterns for outflows driven by molecular jets, caused by the combined strong cooling, small imposed jet shear and precession. We also find shoulders in the interface with associated shocks visible in our simulated near-infrared H2 images. The shoulder location relative to the front of the bow shock distinguishes the relative density. Apart from this, the outflow structures are quite similar provided the jet is molecular. The ratio of jet power to H2 1-0 S(1) line luminosity (increasingly required to interpret observations), is generally in the range 80-600. Sub-millimetre CO properties, including a velocity-position and velocity-channel diagram; are presented. We compare mass-velocity relationships derived directly and via the simulated CO data: significant systematic differences are uncovered. For the future, we identify fine-scale structure in the rotational CO 2-1 and CO 14-13 rotational lines which can be resolved with the millimetre array ALMA and the Herschel (FIRST) Observatory. We identify highly collimated outflows in the near-infrared that can be interpreted by this model.

Abstract Copyright:

Journal keyword(s): hydrodynamics - shock waves - ISM: clouds - ISM: molecules

Simbad objects: 21

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Number of rows : 21

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 288 HH 00 37 13.6 +64 04 15           ~ 22 0
2 HH 195 HH 03 25 14.9 +30 47 00           ~ 8 0
3 HH 211 cor 03 43 56.52 +32 00 52.8           ~ 296 0
4 2MASX J05181754+0710589 Y*O 05 18 17.549 +07 10 58.96           ~ 24 0
5 NAME HH 240/241 DNe 05 19 48.9 -05 52 05           ~ 105 1
6 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1025 2
7 HH 34 HH 05 35 31.30 -06 28 43.0     16     ~ 470 2
8 NAME SH 2-233 IR Cl* 05 39 10.4 +35 45 19           ~ 93 0
9 IRAS 05358+3543 mul 05 39 10.4 +35 45 19           ~ 136 1
10 IRAS 05399-0121 Y*O 05 42 27.68 -01 20 01.0           ~ 35 0
11 HH 212 HH 05 43 51.41 -01 02 53.1           ~ 286 1
12 [CB88] 34 MoC 05 47 02.3 +21 00 10           ~ 59 0
13 HH 311 HH 05 49 57.000 +02 53 12.00           ~ 23 1
14 HH 111 HH 05 51 44.2 +02 48 34           ~ 387 0
15 HH 113 HH 05 53 35.0 +02 43 23           ~ 20 0
16 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1606 1
17 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 279 0
18 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 361 1
19 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 952 0
20 GGD 34 HH 21 43 30.4 +66 03 43           ~ 32 0
21 NAME Cep E HII 23 03 12.779 +61 42 25.75           ~ 157 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-13:03:30

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