Dust Production in a Thin Dense Shell in Supernovae with Early Circumstellar Interactions

Abstract In supernovae (SNe), where the light curves show evidence of strong and early interaction between ejecta circumstellar matter (CSM), formation new dust is estimated to take place in a dense shell gas forward shock (FS) reverse (RS). For first time, this study mechanism modeled. A set nine cases, considering variations mass pre-explosion mass-loss rates, considered, accounting for diverse nature interactions reported such SNe. single main-sequence mass, variation was manifested as H-shell star, lost due loss. We find that masses range 10 ?3 0.8 M ? , composed O-rich C-rich grains, whose relative proportions are determined by interaction. Dust post-shock characterized gradual production rate, mostly ranging from ?6 day ?1 which may continue decade, post-explosion. higher rate leads larger dust, while smaller (smaller leftover H shell) increases efficiency formed behind RS, our calculations, not subject destruction either FS or RS thus likely survive proportion than ejecta.