Emission Line Ratios from Variable Velocity Jet Models

Details Emission Line Ratios from Variable Velocity Jet Models Emission Line Ratios from Variable Velocity Jet Models

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxaa..42..217k&link_type=abstract

Revista Mexicana de Astronomía y Astrofísica Vol. 42, pp. 217-228 (2006)

Astronomy and Astrophysics

Astronomy

5

Ism: Jets And Outflows, Ism: Kinematics And Dynamics

Scientific paper

In this paper we present a grid of axisymmetric numerical simulations of variable ejection velocity jets. In these models we assume that the jets are ejected with a sinusoidally varying ejection velocity and a time-independent ejection density. The grid of models then spans a range of different velocity variability amplitudes and periods. Because the simulations include a treatment of the non-equilibrium ionization state of the gas, we are able to make predictions of the emission in a set of different emission lines. In this way, we obtain predicted emission line ratios for the successive knots along the jets (which correspond to the ``internal working surfaces'' formed as a result of the ejection velocity variability), which can be compared directly with observations of the chains of knots along HH jets.

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