Journal
EUROPEAN PHYSICAL JOURNAL A
Volume 59, Issue 12, Pages -Publisher
SPRINGER
DOI: 10.1140/epja/s10050-023-01199-x
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In this study, we investigated the liquid phase of the crust of a proto-neutron star using a self-consistent multi-component approach. We found that our multi-component calculations provided more accurate predictions of the abundance of helium clusters compared to the single-nucleus approach.
Being born hot from core-collapse supernova, the crust of the proto-neutron star is expected to be made of a Coulomb liquid and composed of an ensemble of different nuclear species. In this work, we study the beta-equilibrated proto-neutron-star crust in the liquid phase in a self-consistent multi-component approach, employing a compressible liquid-drop description of the ions including the ion centre-of-mass motion. Particular care is also devoted to the calculation of the rearrangement term, thus ensuring thermodynamic consistency. We compare the results of the multi-component plasma calculations with those obtained within a one-component (single-nucleus) approach, showing that important differences arise between the predictions of the two treatments. In particular, the abundances of helium clusters become important using a complete multi-component plasma approach, and eventually dominate the whole distribution at higher temperature in the crust.
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