TIMING NOISE IN PULSARS AND MAGNETARS AND THE MAGNETOSPHERIC MOMENT OF INERTIA

被引：13

作者：

Tsang, David ^{[1
]}

Gourgouliatos, Konstantinos N. ^{[1
]}

机构：

[1] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2013年 / 773卷 / 01期

关键词：

pulsars: general; stars: magnetars; stars: magnetic field; X-RAY PULSARS; CRAB PULSAR; SOUTHERN PULSARS; NEUTRON-STARS; DISCOVERY; GLITCHES;

D O I：

10.1088/2041-8205/773/1/L17

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We examine timing noise in both magnetars and regular pulsars, and find that there exists a component of the timing noise (sigma(TN)) with strong magnetic field dependence (sigma(TN) similar to B-o(2)Omega T-3/2) above B-o similar to 10(12.5) G. The dependence of the timing noise floor on the magnetic field is also reflected in the smallest observable glitch size. We find that magnetospheric torque variation cannot explain this component of timing noise. We calculate the moment of inertia of the magnetic field outside of a neutron star and show that this timing noise component may be due to variation of this moment of inertia, and could be evidence of rapid global magnetospheric variability.

引用

页数：5