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Open-source nuclear equation of state framework based on the liquid-drop model with Skyrme interaction

da Silva Schneider, Andre and Roberts, Luke F. and Ott, Christian D. (2017) Open-source nuclear equation of state framework based on the liquid-drop model with Skyrme interaction. Physical Review C, 96 (6). Art. No. 065802. ISSN 2469-9985.

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The equation of state (EOS) of dense matter is an essential ingredient for numerical simulations of core-collapse supernovae and neutron star mergers. The properties of matter near and above nuclear saturation density are uncertain, which translates into uncertainties in astrophysical simulations and their multimessenger signatures. Therefore, a wide range of EOSs spanning the allowed range of nuclear interactions are necessary for determining the sensitivity of these astrophysical phenomena and their signatures to variations in input microphysics. We present a new set of finite temperature EOSs based on experimentally allowed Skyrme forces. We employ a liquid-drop model of nuclei to capture the nonuniform phase of nuclear matter at subsaturation density, which is blended into a nuclear statistical equilibrium EOS at lower densities. We also provide a new, open-source code for calculating EOSs for arbitrary Skyrme parametrizations. We then study the effects of different Skyrme parametrizations on thermodynamical properties of dense astrophysical matter, the neutron star mass-radius relationship, and the core collapse of 15 and 40 solar mass stars.

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URLURL TypeDescription Paper
Ott, Christian D.0000-0003-4993-2055
Alternate Title:A New Open-Source Nuclear Equation of State Framework based on the Liquid-Drop Model with Skyrme Interaction
Additional Information:© 2017 American Physical Society. (Received 5 July 2017; revised manuscript received 27 July 2017; published 8 December 2017) We acknowledge helpful discussions with C. J. Horowitz, J. Lattimer, H. Nagakura, A. Ohnishi, and S. Richers. We thank Y. Suwa for pointing out that it is advantageous to preserve the precollapse pressure stratification when mapping stellar profiles into the core collapse code. A.S.S. was supported in part by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (Grant No. 2014 32/2014-5). This research was also funded by the National Science Foundation under Awards No. AST-1333520, No. CAREER PHY-1151197, No. PHY-1404569, and by the Sherman Fairchild Foundation. C.D.O. thanks the Yukawa Institute for Theoretical Physics (YITP) for support and hospitality during the completion of this paper, which has been assigned report no. YITP-17-32.
Group:TAPIR, Walter Burke Institute for Theoretical Physics
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)201432/2014-5
Sherman Fairchild FoundationUNSPECIFIED
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Issue or Number:6
Record Number:CaltechAUTHORS:20170713-154611153
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Official Citation:Open-source nuclear equation of state framework based on the liquid-drop model with Skyrme interaction A. S. Schneider, L. F. Roberts, and C. D. Ott Phys. Rev. C 96, 065802
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79099
Deposited By: Joy Painter
Deposited On:14 Jul 2017 14:42
Last Modified:03 Oct 2019 18:16

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