Equation of State of Strongly Magnetized Matter with Hyperons and Δ-Resonances

被引：25
作者：
Thapa, Vivek Baruah [1 ]
Sinha, Monika [1 ]
Li, Jia Jie [2 ,3 ]
Sedrakian, Armen [4 ,5 ]
机构：
[1] Indian Inst Technol Jodhpur, Jodhpur 342037, Rajasthan, India
[2] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
[3] Goethe Univ, Inst Theoret Phys, Max Laue Str 1, D-60438 Frankfurt, Germany
[4] Frankfurt Inst Adv Studies, Ruth Moufang Str 1, D-60438 Frankfurt, Germany
[5] Univ Wroclaw, Inst Theoret Phys, Pl M Borna 9, PL-50204 Wroclaw, Poland
来源：
PARTICLES | 2020年 / 3卷 / 04期
关键词：
neutron stars; magnetic fields; equation of state; hyperons; resonances; NEUTRON-STARS; FIELD; PHYSICS; PULSAR; MODELS;
D O I：
10.3390/particles3040043
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We construct a new equation of state for the baryonic matter under an intense magnetic field within the framework of covariant density functional theory. The composition of matter includes hyperons as well as Delta-resonances. The extension of the nucleonic functional to the hypernuclear sector is constrained by the experimental data on Lambda and Xi-hypernuclei. We find that the equation of state stiffens with the inclusion of the magnetic field, which increases the maximum mass of neutron star compared to the non-magnetic case. In addition, the strangeness fraction in the matter is enhanced. Several observables, like the Dirac effective mass, particle abundances, etc. show typical oscillatory behavior as a function of the magnetic field and/or density which is traced back to the occupation pattern of Landau levels.
引用
收藏
页码：660 / 675
页数：16
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