The spin evolution of the pulsars with non-rigid core

2nd International Symposium on the Modern Physics of Compact Stars and Relativistic Gravity

物理学;天文学

Barsukov, D.P.^1,2 ; Goglichidze, O.A.^1 ; Tsygan, A.I.^1

Ioffe Physical-Technical Institute, Russian Academy of Sciences, Saint-Petersburg, Russia^1

Saint-Petersburg State Polytechnical University, Saint-Petersburg, Russia^2

关键词: Core interactions;    Core rotation;    Inclination angles;    Limiting case;    Neutron stars;    Observational data;    Orthogonal state;    Spin evolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/496/1/012013/pdf
DOI  :  10.1088/1742-6596/496/1/012013

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We formulate a model of pulsar spin evolution (braking, inclination angle evolution and radiative precession) taking into account the non-rigidity of neutron star rotation. We discuss two simple limiting cases of this model and show that the evolution of the inclination angle substantially depends on the model of crust-core interaction. The non-rigidity of core rotation accelerates the inclination angle evolution and makes all pulsars evolve to the orthogonal state. The size of the effect depends on the amount of differentially rotating matter and mechanism of its interaction with the rest of the star. Since the rapid evolution of the inclination angle apparently contradicts the observational data, our results may be used as an additional test for the theories of the cores of neutron stars.