Year: 2024
Type: article
Abstract: This paper explores the use of low-dimensional parametric representations of neutron-star equations of state that include discontinuities caused by phase transitions. The accuracies of optimal piecewise-analytic and spectral representations are evaluated for equations of state having first- or second-order phase transitions with a wide range of discontinuity sizes. These results suggest that the piecewise-analytic representations of these nonsmooth equations of state are convergent, while the spectral representations are not. Nevertheless, the lower-order ($2\ensuremath{\le}{N}_{\text{parms}}\ensuremath{\le}7$) spectral representations are found to be more accurate than the piecewise-analytic representations with the same number of parameters.
Author: Lee Lindblom
Institution: University of California San Diego
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: National Science Foundation
OpenAlex ID: W4401460282