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arXiv · 2407.08407

The minimum neutron star mass in neutrino-driven supernova explosions

Bernhard Müller·Alexander Heger·Jade Powell
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Abstract

Supernova theory has struggled to explain the lightest known neutron star candidate with an accurate mass determination, the $1.174\mathrm{M}_\odot$ companion in the eccentric compact binary system J0453+1559. To improve the theoretical lower limit for neutron star birth masses, we perform 3D supernova simulations for five stellar models close to the minimum mass for iron core collapse. We obtain a record-low neutron star mass of $1.192\mathrm{M}_\odot$ and a substantial kick of $\mathord{\sim} 100\,\mathrm{km}\,\mathrm{s}^{-1}$. Given residual uncertainties in stellar evolution, a neutron star origin for the $1.174\mathrm{M}_\odot$ object remains plausible.

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Bernhard Müller, Alexander Heger, Jade Powell. 2024-07-11. The minimum neutron star mass in neutrino-driven supernova explosions. https://arxiv.org/abs/2407.08407

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