Journal Article

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

Jesús Zavala, Pablo F. Velázquez, Adriano H. Cerqueira and Gloria M. Dubner

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 387, issue 2, pages 839-844
Published in print June 2008 | ISSN: 0035-8711
Published online May 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13281.x
Three-dimensional hydrodynamical simulations of the large-scale structure of W50−SS433

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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.

Keywords: shock waves; methods: numerical; ISM: jets and outflows; supernova remnants

Journal Article.  4704 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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