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The influence of entropy and neutrinos on the properties of protoneutron stars

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Abstract

A neutron star is formed by the evolution of a protoneutron star, so the study of the properties of protoneutron stars can help in understanding the structure and composition of neutron stars. The mass and radius of a cold neutron star calculated by the selected parameters are consistent with various existing astronomical observations. This set of parameters is then extrapolated to study the properties of a protoneutron star. This paper considers the isentropic protoneutron star matter with hyperons to study the temperature, composition, and oscillation under different conditions. Entropy promotes the production of hyperons, while neutrinos inhibit it. The maximum mass increases as the entropy and neutrino proportion increase. The temperature and radius increase with entropy, while the radius decreases as the neutrino proportion increases. The linear relationship between the frequency and average density of the protoneutron star and temperature is fitted, which is important for future observations.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All results are shown in figures or table and are clearly given. The experimental data we cited can be obtained from references.]

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Acknowledgements

We thank the anonymous referees for many useful comments and suggestions. This work was supported by the Natural Science Foundation of China (Grant no. 12105231) and the Guiding Local Science and Technology Development Projects by the Central Government of China (Grant no. 2021ZYD0031).

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Authors and Affiliations

  1. College of Electronic Information and Electrical Engineering, Chengdu University, Chengdu, 610106, China

    Xueling Mu

  2. School of Astronomy and Space Science, Nanjing University, Nanjing, 210023, China

    Bin Hong

  3. Physics and Space Science College, China West Normal University, Nanchong, 637009, China

    Xia Zhou & Zhongwen Feng

  4. School of Mathematics and Physics, University of South China, Hengyang, 421001, China

    Guansheng He

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  1. Xueling Mu
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Correspondence to Bin Hong.

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Communicated by Jérôme Margueron.

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Mu, X., Hong, B., Zhou, X. et al. The influence of entropy and neutrinos on the properties of protoneutron stars. Eur. Phys. J. A 58, 76 (2022). https://doi.org/10.1140/epja/s10050-022-00721-x

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