We present a 2D study of the overshoot convective mechanism in nova outbursts for a wide range of possible compositions of the layer underlying the accreted envelope. Previous surveys studied this mechanism only for solar composition matter accreted on top of carbon oxygen (CO) white dwarfs. Since, during the runaway, mixing with carbon enhances the hydrogen burning rates dramatically, one should question whether significant enrichment of the ejecta is possible also for other underlying compositions (He, O, Ne, Mg) predicted by stellar evolution models. When needed we upgraded our reaction network and simulated several non-carbon cases. Despite large differences in rates, time scales and energetics, our results show that the convective dredge up mechanism predicts significant enrichment in all cases, including that of helium enrichment in recurrent novae.
|Title of host publication||Stella Novae:|
|Subtitle of host publication||Past and Future Decades|
|Editors||P.A. Woudt, V.A.R.M. Ribeiro|
|Place of Publication||SAN FRANCISCO, CA|
|Number of pages||8|
|State||Published - 2014|
|Name||Astronomical Society of the Pacific Conference Series|