I-Q Relation for Rapidly Rotating Neutron Stars

被引：103

作者：

Chakrabarti, Sayan ^{[1
,2
]}

Delsate, Terence ^{[2
,3
]}

Guerlebeck, Norman ^{[4
]}

Steinhoff, Jan ^{[2
]}

机构：

[1] Indian Inst Technol Guwahati, Dept Phys, North Guwahati 781039, Assam, India

[2] Univ Lisbon, IST, Dept Fis, Ctr Multidisciplinar Astrofis,CENTRA, P-1049001 Lisbon, Portugal

[3] Univ Mons, UMons, B-7000 Mons, Belgium

[4] Univ Bremen, ZARM, D-28359 Bremen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 20期

关键词：

EQUATION-OF-STATE; RELATIVISTIC STARS; UNIVERSAL RELATIONS; QUADRUPOLE-MOMENTS; NUMERICAL-METHOD; NUCLEON MATTER; DENSE MATTER;

D O I：

10.1103/PhysRevLett.112.201102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider a universal relation between moment of inertia and quadrupole moment of arbitrarily fast rotating neutron stars. Recent studies suggest that this relation breaks down for fast rotation. We find that it is still universal among various suggested equations of state for constant values of certain dimensionless parameters characterizing the magnitude of rotation. One of these parameters includes the neutron star radius, leading to a new universal relation expressing the radius through the mass, frequency, and spin parameter. This can become a powerful tool for radius measurements.

引用

页数：5

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