Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...493..115r&link_type=abstract
Astronomy and Astrophysics, Volume 493, Issue 1, 2009, pp.115-118
Astronomy and Astrophysics
Astrophysics
4
Ism: Kinematics And Dynamics, Ism: Jets And Outflows, Ism: Herbig-Haro Objects, Stars: Winds, Outflows
Scientific paper
Context: Several curved Herbig-Haro (HH) jet/counterjet systems have been observed. Some of these systems are the result of a relative motion between the outflow source and the surrounding environment. Aims: In this paper, we consider the case of an HH jet/counterjet system that is immersed in an isotropic stellar wind. This situation is somewhat different from the previously studied HH jet/plane-parallel side wind interaction, because the isotropic wind is divergent, and has a radially dependent density structure. Methods: We present an analytic model for a jet/wind interaction that is based on the balance between the ram pressure of the wind and the centrifugal pressure along the curved jet/counterjet path. We consider the case of an isothermal jet. Results: We find that, if we have a jet and a wind with similar velocities and mass loss rates, the jet/counterjet system only shows a shallow curvature, with a total deflection angle of only a few degrees. However, if we have stronger winds, quite large deflections are produced (e.g., for the interaction of an HH jet with the wind from an O star). The deflection angle depends on neither the separation between the jet and wind sources nor on the ejection direction of the jet/counterjet.
Cantó Jorge
Esquivel Alejandro
Raga Alejandro C.
Rodriguez-Gonzalez Ary
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