A 3-mode, variable velocity jet model for HH 34

Details A 3-mode, variable velocity jet model for HH 34 A 3-mode, variable velocity jet model for HH 34

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.1705n&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #17.05; Bulletin of the American Astronomical Society, Vol. 30, p.1278

Astronomy and Astrophysics

Astronomy

Scientific paper

Variable ejection velocity jet models can qualitatively explain the appearance of successive working surfaces in Herbig-Haro (HH) jets. This paper presents an attempt to explore which features of the HH 34 jet can indeed be reproduced by such a model. From previously published data on this object, we find evidence for the existence of a 3-mode ejection velocity variability, and then explore the implications of such a variability. From simple, analytic considerations it is possible to show that the longer period modes produce a modulation on the shorter period modes, resulting in the formation of ``trains'' of multiple knots. The knots observed close to the source of HH 34 could correspond to such a structure. Finally, a numerical simulation with the ejection velocity variability deduced from the HH 34 data is computed. This numerical simulation shows a quite remarkable resemblance with the observed properties of the HH 34 jet.

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