Retorne
Título               : 3-D numercial simulations of Astrophysical and Laboratroy Jets  
Conferencista: Alex Raga, UNAM  
Data                  : Quarta-Feira, 21/03/01 15H30M  
Local                 : Auditório L.B.F. Clauzet - Água Funda  
Sumário           :
In the last two years, a new 3D gasdynamic, adaptive grid code (yguazu-a) has been developed, primarily to treat problems of astrophysical jets. In order to validate this code, we have carried out comparisons between the obtained results and laboratory experiments of laser-generated explosions and jets. These comparisons are surprisingly encouraging, giving us confidence that the code indeed gives results that do not deviate drastically from the real solutions of the gasdynamic equations. We then use this code to compute a model for the "triple source" radio jet in Serpens. This jet is ejected by a young star, and shows high proper motions and intensity changes that make it ideal for carrying out comparisons with a time-dependent jet simulation. We conclude that the observations qualitatively agree with the predictions of radio continuum emission from a model of a jet ejected with a time-dependent velocity, and with a precession of the outflow axis.