منابع مشابه
An Analytic Flow Solution for YSO Jets
We present an analytic solution for a jet flow from a young stellar object (YSO). This solution allows us to compute the speed, density, and magnetic field strength of the flow, but it is only true if YSO jet flows are powered by toroidal magnetic fields. We illustrate how the balance between centrifugal force and magnetic pressure provides the converging/diverging nozzle shape required to acce...
متن کاملHydrodynamic Collimation of Yso Jets
We present the results of numerical hydrodynamic models for the collimation of outflows from young stellar objects. We show that the presence of a toroidal environment can lead to efficient formation of jets and bipolar outflows from initially uncollimated central winds. The interaction between the wind and the environment leads to two types of collimation, one which is dominated by radiative c...
متن کاملTracing Shock Evolution in Yso Jets
We have undertaken new observations tracing the evolution of shocks along the best resolved examples of protostellar jets by means of high resolution, deep K-band spectroscopy at UKIRT and NTT. In this paper we analyse trends in H2 excitation within the well collimated jet of HH 212, comprising multiple bows along each flow axis. The aim of our survey is to better understand the origin of the s...
متن کاملAnalytic Solution for Hypersonic Flow Past a Slender Elliptic Cone Using Second-Order Perturbation Approximations
An approximate analytical solution is obtained for hypersonic flow past a slender elliptic cone using second-order perturbation techniques in spherical coordinate systems. The analysis is based on perturbations of hypersonic flow past a circular cone aligned with the free stream, the perturbations stemming from the small cross-section eccentricity. By means of hypersonic approximations for the ...
متن کاملGenerating Yso Jets: What the Hst Has to Tell Us
It is now realised that outflows from young stars are an essential part of the star-formation process and may even be necessary for disk accretion to occur. While the flows themselves can stretch for several parsecs, they are nevertheless generated within a radius of at most a few AU from their source. Such distances correspond, for the nearest star-forming regions, to angular scales of around ...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Australia
سال: 1998
ISSN: 1323-3580,1448-6083
DOI: 10.1071/as98259