Abstract
The production of the proton-rich isotopes beyond iron that we observe today in the solar system is still uncertain. Thermonuclear supernovae (SNe Ia) exploding within the single-degenerate scenario have been proposed to be a potential source for these isotopes. We calculate accretion models and the nucleosynthesis for four WD with different initial mass 0.85, 1.26, 1.32 and 1.38 solar masses models), calculating the full abundance distribution. The abundance distribution peaks between Fe and Zr for the model at 1 M\(_{\odot }\), while for larger WDs much higher production efficiency is obtained beyond iron, with a strong production up to the Pb region. Using these results, we compute the nucleosynthesis of proton rich heavy isotopes using a multi-D SNe Ia model, and discuss the uncertainties affecting our results.
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Notes and Comments
We presented for the first time a heavy-element distribution calculated from realistic simulations of WD-accretion phase in the single degenerate scenario channel to SNIa. The final abundance distribution presents large quantities of Rb, Kr, Zr, Ba-peak isotopes, including Pb for our M1p316.Z1m2 and M1p376.Z1m2 models. Is therefore globally very similar to the one adopted in [12]. When used as a starting abundance distribution, p-nuclei are significantly produced in the mass range 96 < A < 196. This research was enabled in part by support provided by WestGrid (www.westgrid.ca) and Compute Canada Calcul Canada (www.computecanada.ca). NuGrid data is served by Canfar CADC. UB and CLW acknowledge support from the Science and Technology Facilities Council UK (ST/M006085/1), and the European Research Council ERC-2015-STG Nr. 677497.
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Battino, U., Travaglio, C., Pignatari, M., Lederer-Woods, C. (2019). Heavy Elements Nucleosynthesis on Accreting White Dwarfs Surface: Seeding the p-Process. In: Formicola, A., Junker, M., Gialanella, L., Imbriani, G. (eds) Nuclei in the Cosmos XV. Springer Proceedings in Physics, vol 219. Springer, Cham. https://doi.org/10.1007/978-3-030-13876-9_29
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DOI: https://doi.org/10.1007/978-3-030-13876-9_29
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