2002A&A...387..187L


Query : 2002A&A...387..187L

2002A&A...387..187L - Astronomy and Astrophysics, volume 387, 187-200 (2002/5-3)

A global jet/circulation model for young stars.

LERY T., HENRIKSEN R.N., FIEGE J.D., RAY T.P., FRANK A. and BACCIOTTI F.

Abstract (from CDS):

Powerful, highly collimated jets, surrounded by bipolar molecular outflows, are commonly observed near Young Stellar Objects (YSOs). In the usual theoretical picture of star formation, a jet is ejected from a magnetized accretion disk, with a molecular outflow being driven either by the jet or by a wider wind coming from the disk. Here, we propose an alternative global model for the flows surrounding YSOs. In addition to a central accretion-ejection engine driving the jet, the molecular outflow is powered by the infalling matter and follows a circulation pattern around the central object without necessarily being entrained by a jet. It is shown that the model produces a heated pressure-driven outflow with magneto-centrifugal acceleration and collimation. We report solutions for the three different parts of this self-similar model, i.e. the jet, the infalling envelope and the circulating matter that eventually forms the molecular outflow. This new picture of the accretion/outflow phase provides a possible explanation for several observed properties of YSO outflows. The most relevant ones are the presence of high mass molecular outflows around massive protostars, and a realistic fraction (typically 0.1) of the accretion flow that goes into the jet.

Abstract Copyright:

Journal keyword(s): stars: formation - methods: analytical - magnetohydrodynamics (MHD) - ISM: jets and outflows

Simbad objects: 10

goto Full paper

goto View the references in ADS

Number of rows : 10
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 RAFGL 490 Y*O 03 27 38.7928323987 +58 47 00.017662871           ~ 344 0
2 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 780 1
3 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 822 0
4 V* HL Tau Or* 04 31 38.471952 +18 13 58.08504   15.89 14.49 14.39   K5 1271 0
5 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 796 0
6 [MCK88] NGC 2024 FIR 5 cor 05 41 44.6 -01 55 38           ~ 91 0
7 NGC 2071 RNe 05 47 10 +00 18.0           ~ 617 1
8 NAME Mon R2 HII 06 07 47.58 -06 22 42.6           ~ 675 2
9 V* R Mon Ae* 06 39 09.9538710861 +08 44 09.559404231 10.76 12.46 11.85 10.96 10.25 B8IIIe 506 0
10 2MASS J08254384-5100326 Y*O 08 25 43.85 -51 00 32.7           ~ 300 1

To bookmark this query, right click on this link: simbad:objects in 2002A&A...387..187L and select 'bookmark this link' or equivalent in the popup menu


2021.08.04-07:54:15

© Université de Strasbourg/CNRS

    • Contact