Summary
The dichotomy of astrophysical flows to appear either as collimated jets, or, uncollimated winds is discussed in the frame of ideal magnetohydrodynamics (MHD). In particular, we focus on the energetics of these outflows as an explanation of their appearance. In the simplest case where in the basic HD nonlinear and coupled partial differential equations, the physical variables of the radial distance and the latitude are separable, we analytically and explicitly show that there exists a universal integral of the system. This integral provides an energetic criterion, which may distinguish noncollimated astrophysical winds from well collimated jets.
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Acknowledgements
The authors are indebted to Drs Joao Lima and Nektarios Vlahakis, as well as to Loic Chantry for several stimulating discussions on the subject of this paper. KT would like to express his very great appreciation to all participants of the JETSET network for a pleasant and fruitful collaboration throughout the last 15 years.
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Tsinganos, K., Damoulakis, M., Sauty, C., Cayatte, V. (2019). An Energetic Criterion for Astrophysical Winds and Jets. In: Sauty, C. (eds) JET Simulations, Experiments, and Theory. Astrophysics and Space Science Proceedings, vol 55. Springer, Cham. https://doi.org/10.1007/978-3-030-14128-8_2
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DOI: https://doi.org/10.1007/978-3-030-14128-8_2
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