Interaction of planetary nebulae, Eta-Carinae and supernova remnants with the Interstellar Medium

摘要

The image of planetary nebulae (PN), supernova remnant (SNR) and Eta-Carinaeis made by three different physical processes. The first process is theexpansion of the shell that can be modeled by the canonical laws of motion inthe spherical case and by the momentum conservation when gradients of densityare present in the interstellar medium. The quality of the simulations isintroduced along one direction as well along many directions. The second process is the diffusion of particles that radiate from theadvancing layer. The 3D diffusion from a sphere, the 1D diffusion with driftand 1D random walk are analyzed. The third process is the composition of theimage through an integral operation along the line of sight. The developedframework is applied to three PN which are A39, the Ring nebula and the etchedhourglass nebula MyCn 18, the hybrid object Eta-Carinae, and to two SNR whichare SN 1993J and SN 1006. In all the considered cases a careful comparisonbetween the observed and theoretical profiles in intensity is done.