2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/163264This paper presents hydrodynamical and radiation-hydrodynamical simulations of the nickel bubble effect in Type Ia supernovae, comparison of results to self-similar solutions, and application to observations of Type Ia supernova remnants, with a particular emphasis on Tycho's SNR.ApJ, 2008, accepted, 36 pagesAstrophysicstext