Three-dimensional hydrodynamical simulations of the large-scale structure of W50−SS433

We present 3D hydrodynamical simulations of a precessing jet propagating inside a supernova remnant (SNR) shell, particularly applied to the W50−SS433 system in a search for the origin of its peculiar elongated morphology. Several runs were carried out with different values for the mass-loss rate of...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2008-06, Vol.387 (2), p.839-844
Main Authors: Zavala, Jesús, Velázquez, Pablo F., Cerqueira, Adriano H., Dubner, Gloria M.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Earth, ocean, space
Exact sciences and technology
Fluid dynamics
ISM: jets and outflows
methods: numerical
shock waves
Simulation
supernova remnants
Three dimensional imaging
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Summary:We present 3D hydrodynamical simulations of a precessing jet propagating inside a supernova remnant (SNR) shell, particularly applied to the W50−SS433 system in a search for the origin of its peculiar elongated morphology. Several runs were carried out with different values for the mass-loss rate of the jet, the initial radius of the SNR, and the opening angle of the precession cone. We found that our models successfully reproduce the scale and morphology of W50 when the opening angle of the jets is set to 10° or if this angle linearly varies with time. For these models, more realistic runs were made considering that the remnant is expanding into an interstellar medium with an exponential density profile (as H i observations suggest). Taking into account all these ingredients, the large-scale morphology of the W50−SS433 system, including the asymmetry between the lobes (formed by the jet–SNR interaction), is well reproduced.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2008.13281.x