A Comparison Between Analytic and Numerical Results of a Steady Jet Model

Astronomy and Astrophysics – Astronomy

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Scientific paper

RESUMEN Las estructuras de nudos o condensaciones compactas bien alineadas en chorros estelares pueden interpretarse en terminos de modelos de choques internos cruzados. En este trabajo se presentan nuevos modelos analfticos y numicos para la formaci6n de choques cruzados en chorros estacionarios. Se encuentra un buen acuerdo entre los modelos anaifticos y numicos lo cual permite hacer predicciones concretas sobre las propiedades de los choques cruzados en funci6n de los parametros del flujo. Estas predicciones son importantes al tratar de identificar las estructuras de cheques cruzados que posiblemente existen en los chorros estelares. ABSTRACT The structures of well aligned knots in stellar jets can be interpreted in terms of crossing shock models. In this paper, new analytic and numerical niodds for the formation of crossing shocks in steady jets are presented. The good agreement ibund between analytic and numerical results allows us to present clear predictions of the properties of steady crossing shocks as a flinction of the flow parameters. These predictions should be useful for trying to identif the crossing shock structures that possibly exist in stellar jets. K words: HYDRODYNAMICS - ISM -JETh AND OUTFLOWS - SHOCK WAVES

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