Stability of super-Chandrasekhar magnetic white dwarfs
N. Chamel, A.F. Fantina, P.J. Davis
TL;DR
This paper investigates the stability of super-Chandrasekhar magnetic white dwarfs, suggesting that nuclear reactions and electron captures could limit their existence, impacting models of overluminous type Ia supernovae.
Contribution
It introduces the potential instability mechanisms in highly magnetized super-Chandrasekhar white dwarfs, challenging their viability as supernova progenitors.
Findings
Electron captures limit white dwarf stability
Pycnonuclear reactions contribute to instability
Super-Chandrasekhar models may be less viable
Abstract
It has been recently proposed that very massive white dwarfs endowed with strongly quantizing magnetic fields might be the progenitors of overluminous type Ia supernovae like SN 2006gz and SN 2009dc. In this work, we show that the onset of electron captures and pycnonuclear reactions in these putative super-Chandrasekhar white dwarfs may severely limit their stability.
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