Abstract
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.
| Original language | English |
|---|---|
| Article number | 100 |
| Journal | Proceedings of Science |
| Volume | 07-11-July-2015 |
| Publication status | Published - Jan 1 2014 |
| Externally published | Yes |
| Event | 13th Nuclei in the Cosmos, NIC 2014 - Debrecen, Hungary Duration: Jul 7 2014 → Jul 11 2014 |
Fingerprint
All Science Journal Classification (ASJC) codes
- General
Cite this
How do neutron star radii depend on their core-crust EoS? / Ishizuka, Chikako; Nakazato, Ken'ichiro; Ohnishi, Akira.
In: Proceedings of Science, Vol. 07-11-July-2015, 100, 01.01.2014.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - How do neutron star radii depend on their core-crust EoS?
AU - Ishizuka, Chikako
AU - Nakazato, Ken'ichiro
AU - Ohnishi, Akira
PY - 2014/1/1
Y1 - 2014/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84957673619&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84957673619&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:84957673619
VL - 07-11-July-2015
JO - Proceedings of Science
JF - Proceedings of Science
SN - 1824-8039
M1 - 100
ER -