Statistics – Computation
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...410..686d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 410, no. 2, p. 686-695.
Statistics
Computation
71
Computational Astrophysics, Cooling Flows (Astrophysics), Early Stars, Herbig-Haro Objects, Supersonic Jet Flow, Three Dimensional Models, Astronomical Models, Emission Spectra, Hydrodynamic Equations, Shock Waves, Taylor Instability
Scientific paper
We present the first results of fully 3D simulations of supersonic, radiatively cooling jets using the smoothed particle hydrodynamics technique (SPH). Our results qualitatively agree with the 2D simulations of Blondin et al. (1990), although the removal of the axisymmetry has resulted in relevant structural differences, especially at the jet head where a cold shell is formed from the condensation of shock-heated material. In particular, we found that the shell is not only dynamically unstable but also may undergo oscillations in density, which are attributed to global thermal instabilities. These effects may have important consequences on the dynamics and emission pattern of the observed HH objects associated to young stellar jets. We discuss the implications of our results in the interpretation of the observed properties of the stellar jets and HH objects. We also compare the structure of radiative cooling and adiabatic 3D jets.
Benz Willy
de Gouveia dal Pino Elisabete M.
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