2001A&A...367..959R


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.29CEST19:37:49

2001A&A...367..959R - Astronomy and Astrophysics, volume 367, 959-966 (2001/3-1)

A precessing, variable velocity jet model for DG Tauri.

RAGA A., CABRIT S., DOUGADOS C. and LAVALLEY C.

Abstract (from CDS):

We present a first attempt at reproducing the morphology and kinematical properties of the DG Tau microjet using a 3D hydrodynamical numerical simulation of a precessing, variable velocity jet. Synthetic maps and position-velocity diagrams in Hα and [O I]λ6300 are calculated and compared with recent imaging and spectro-imaging observations (Lavalley-Fouquet et al., 2000A&A...356L..41L; Dougados et al., 2000A&A...357...51B). Several observed properties are qualitatively reproduced, such as the knot separation, width, and asymmetric morphology, and the increase in ionization fraction and decrease in electronic density away from the star. However, the predicted kinematics in the region between the two jet knots differs from the observed behaviour. This discrepancy probably results from our simple assumption of a sinusoidal velocity variability, and points to a more complex velocity time-variability in the jet from DG Tau.

Abstract Copyright:

Journal keyword(s): hydrodynamics - stars: individual: DG Tau - ISM: HH objects - ISM: individual objects: HH 158 - ISM: jets and outflows

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* CW Tau Or* 04 14 17.0041128798 +28 10 57.765657757 13.92 13.64 12.36 12.86   K0Ve 316 0
2 V* DG Tau Or* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 930 1
3 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 714 0
4 2MASS J08254384-5100326 Y*O 08 25 43.85 -51 00 32.7           ~ 298 1
5 HH 47 HH 08 25 44.30 -51 00 26.2           ~ 241 0

    Equat.    Gal    SGal    Ecl

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2020.09.29-19:37:49

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