Updated electron-capture rates improve our understanding of core-collapse supernovae

crab nebula

The Crab Nebula, the result of a supernova that occurred in 1054 A.D. 

Image Credit: NASA, ESA, J. Hester, A. Loll (ASU)

An IReNA collaboration between Michigan State University, The University of North Carolina at Chapel Hill and the University of Zagreb performed a systematic study of electron capture rates on 80 nuclei near N=50 that are key to understanding the evolution of core-collapse supernovae just prior to explosion.

As a consequence, the uncertainties in simulations induced by uncertainties in electron-capture rates are strongly reduced. For example, the uncertainty in the electron neutrino luminosity is now less than 10% compared to more than 30% previously.

The work is now being extended to update the electron-capture rates across the whole chart of nuclei. Improvements in rate estimates are made available to the community in the form of a rate library. 

Giraud et al., Phys. Rev. C 105, 055801 (2022) - Editor's Suggestion

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