Emission line images and spectra of asymmetric bowshocks.

Details Emission line images and spectra of asymmetric bowshocks. Emission line images and spectra of asymmetric bowshocks.

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rmxaa..32....3h&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, 32, 3-26 (1996)

Astronomy and Astrophysics

Astronomy

19

Hydrodynamics, Ism-Individual (Hh 1), Ism: Jets And Outflows, Ism: Line-Profiles

Scientific paper

The shape and emission properties of asymmetric radiative bowshocks are investigated using analytic models. Two origins for the asymmetry are considered: 1) a transverse density gradient in the ambient medium into which the bowshock is propagating; 2) a skewness in the pressure distribution of the shocked jet gas that is driving the bowshock. In each case, images and position-velocity diagrams are presented for both high- and low-excitation emission lines. These models are applied to observations of bowshocks at the heads of jets from young stars. It is found that, in the case of Herbig-Haro~1, an ambient density gradient is the most likely cause of the asymmetry observed in this object.

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