Nova Framework: A New Tool For Modeling of Nova Outbursts and Nucleosynthesis
Pavel A. Denissenkov (1), Falk Herwig (1), Marco Pignatari (2), James, W. Truran (3) ((1) University of Victoria, (2) University of Basel, (3), University of Chicago)

TL;DR
The Nova Framework combines stellar evolution and nucleosynthesis tools to model nova outbursts and analyze their nucleosynthesis, incorporating a physically motivated convective boundary mixing approach based on 3D hydrodynamic simulations.
Contribution
It introduces a new integrated modeling framework that accurately simulates nova outbursts on CO and ONe white dwarfs with advanced mixing prescriptions.
Findings
Successful modeling of nova outbursts on CO and ONe white dwarfs.
Implementation of an exponential diffusive CBM based on 3D simulation insights.
Preliminary results showing detailed nucleosynthesis predictions.
Abstract
Classical novae are the results of surface thermonuclear explosions of H-rich material accreted by white dwarfs (WDs) from their low-mass main-sequence or red-giant binary companions. Chemical composition analysis of their ejecta shows that nova outbursts occur on both carbon-oxygen (CO) and oxygen-neon (ONe) WDs, and that there is cross-boundary mixing between the accreted envelope and underlying WD. We have combined the stellar evolution code MESA and post-processing nucleosynthesis tools of NuGrid into a framework that allows to produce up-to-date models of nova outbursts and compute detailed nucleosynthesis in novae occurring on CO and ONe WDs. The convective boundary mixing (CBM) in our 1D numerical simulations is implemented using a diffusion coefficient that is exponentially decreasing with a distance below the bottom of the convective envelope. This MESA CBM prescription is…
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Taxonomy
TopicsAstrophysical Phenomena and Observations · Gamma-ray bursts and supernovae · Stellar, planetary, and galactic studies
