How do neutron star radii depend on their core-crust EoS?

Chikako Ishizuka, Ken'ichiro Nakazato, Akira Ohnishi

研究成果: ジャーナルへの寄稿Conference article

抄録

Nuclear equation of state (EoS) provides the fundamental property of nuclear many body systems. It is expected to be constrained by ongoing astronomical observations of the mass and radius of neutron stars (NSs). It is known that even the same nuclear EoS gives different behaviors for NS radii on the mass-radius plane depending on the treatment of connecting the EoSs at the core- crust boundary. However, there are no systematic surveys on this issue. We report the results of systematic surveys on NS radii by assuming that NS models consist of crust EoSs and core nuclear EoSs. We adopt a variety of EoSs in the literature for crust EoSs, and various parameters of relativistic mean field for core nuclear EoSs. The dependence of NS radii on the core-crust boundary is investigated by solving the Tolman-Oppenheimer-Volkoff equation by taking account the following cases of the boundary. Case-I: the boundary density is the highest density in a given data set for the crust. Case-II: the boundary density exist at somewhere in the sub-nuclear region. In this case, we examine the influence of the crust varying the boundary from 0.1 to 1.0 times the nuclear saturation density (φ0) in steps of 0.1 φ0.

元の言語英語
記事番号100
ジャーナルProceedings of Science
07-11-July-2015
出版物ステータス出版済み - 1 1 2014
外部発表Yes
イベント13th Nuclei in the Cosmos, NIC 2014 - Debrecen, ハンガリー
継続期間: 7 7 20147 11 2014

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neutron stars
crusts
equations of state
radii
saturation

All Science Journal Classification (ASJC) codes

  • General

これを引用

Ishizuka, C., Nakazato, K., & Ohnishi, A. (2014). How do neutron star radii depend on their core-crust EoS? Proceedings of Science, 07-11-July-2015, [100].

How do neutron star radii depend on their core-crust EoS? / Ishizuka, Chikako; Nakazato, Ken'ichiro; Ohnishi, Akira.

:: Proceedings of Science, 巻 07-11-July-2015, 100, 01.01.2014.

研究成果: ジャーナルへの寄稿Conference article

Ishizuka, C, Nakazato, K & Ohnishi, A 2014, 'How do neutron star radii depend on their core-crust EoS?', Proceedings of Science, 巻. 07-11-July-2015, 100.
Ishizuka, Chikako ; Nakazato, Ken'ichiro ; Ohnishi, Akira. / How do neutron star radii depend on their core-crust EoS?. :: Proceedings of Science. 2014 ; 巻 07-11-July-2015.
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