Hiding the high excitation in the head of a fast Herbig-Haro jet

Details Hiding the high excitation in the head of a fast Herbig-Haro jet Hiding the high excitation in the head of a fast Herbig-Haro jet

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...412..745r&link_type=abstract

Astronomy and Astrophysics, v.412, p.745-749 (2003)

Astronomy and Astrophysics

Astrophysics

3

Ism: Herbig-Haro Objects, Ism: Jets And Outflows, Ism: Kinematics And Dynamics, Shock Waves

Scientific paper

We propose that some low excitation HH objects might correspond to the head of a pulsed jet moving into a dense environment. We develop an analytic model showing that the head of such a jet will move slowly, producing a low excitation bow shock. At the times at which the successive pulses catch up with the jet head, high excitation emission will be produced, lasting for a time of the order of the cooling timescale of the material heated in the pulse/jet head interaction. In this way, the jet head has ``flashes'' of high excitation emission superimposed on a ``quiescent'', low excitation emission.

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