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Issue A&A
Volume 381, Number 3, January III 2002
Page(s) L53 - L56
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20011652



A&A 381, L53-L56 (2002)
DOI: 10.1051/0004-6361:20011652

Letter

Knot production in magnetized Herbig-Haro jets

M. Thiele and M. Camenzind

Landessternwarte Königstuhl, 69117 Heidelberg, Germany

(Received 23 April 2001 / Accepted 22 November 2001 )

Abstract
We present the results of a simulation of an axisymmetric (2.5-dimensional), magnetized Herbig-Haro jet. The parameters are chosen for a typical collimated outflow from a young stellar low-mass object. We show that the nose-cone feature of 2D MHD jets critically depends on the magnetic field topology of the precollimation mechanism. The most prominent features of our model jet are knot-like structures along the jet axis which develop in the foremost part of the jet. Shocks associated with these internal knot-like structures mimic bow-shock like features as seen in Herbig-Haro flows.


Key words: stars: HH objects -- magnetohydrodynamics: jets and outflows -- cooling: forbidden emission lines

Offprint request: M. Thiele, mthiele@lsw.uni-heidelberg.de

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© ESO 2002


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