1. Long-period variations of pulsar emission and the dynamical ellipticity of neutron stars
- Author
-
Alexander Gusev and Irina Kitiashvili
- Subjects
Physics ,Astrophysics::High Energy Astrophysical Phenomena ,Stellar rotation ,Nuclear Theory ,Chandler wobble ,X-ray binary ,Astronomy ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Binary pulsar ,Neutron star ,Pulsar ,Space and Planetary Science ,Precession ,Astrophysics::Earth and Planetary Astrophysics ,Astrophysics::Galaxy Astrophysics ,X-ray pulsar - Abstract
Assuming that the observed periodic variations of pulsar emission are due to the free precession of the spin axis, we investigate the evolution of the rotation of a two-layer neutron star using the Hamiltonian method of Getino. We model the dynamical characteristics of a rotating neutron star using the observed variations of the emission of seven pulsars. We estimate the dependence of the period of the Chandler wobble, the period of precession of the spin axis, and the dynamical ellipticity of a neutron star on the model used to describe the super-dense neutron matter and the mass of the star.
- Published
- 2008
- Full Text
- View/download PDF