Nova Framework: A New Tool For Modeling of Nova Outbursts and Nucleosynthesis (Webinar Registration)

Pavel Denisenkov, University of Victoria (Canada)

Abstract:  Novae are complicated and numerically demanding phases of binary star evolution involving extreme conditions of stellar and nuclear physics that are encountered in the explosions of accreted H-rich material on the surfaces of white dwarfs (WDs). For this reason there are far fewer detailed numerical investigations of nova outbursts compared to other phases of stellar evolution.  However, in view of new time-domain observational capabilities, such as PTF and Pan-STARRS, this paucity of predicted observable behavior of novae should be addressed. In addition, nova outbursts depend sensitively on nuclear physics data, and more readily available nova simulations are needed in order to effectively prioritize experimental effort in nuclear astrophysics. In this talk I will present a nova framework that combines the powers of the stellar evolution code MESA and post-processing nucleosynthesis code NuGrid. It has been used to construct multicycle nova evolution sequences with CO WD cores. We have explored a range of WD masses and accretion rates as well as the effect of different cooling times before the onset of accretion. In addition, we have studied the dependence on the elemental abundance distribution of accreted material and convective overshooting at the core-envelope interface. We compare our results with the previous work and propose a new scenario for novae with the 3He-triggered convection.