On quasiperiodic variations of pulsars' periods - an alternative to the planetary interpretation of PSR1257+12

Details On quasiperiodic variations of pulsars' periods - an alternative to the planetary interpretation of PSR1257+12 On quasiperiodic variations of pulsars' periods - an alternative to the planetary interpretation of PSR1257+12

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aspc...36...61d&link_type=abstract

In: Planets around pulsars; Proceedings of the Conference, California Inst. of Technology, Pasadena, Apr. 30-May 1, 1992 (A93-36

Physics

4

Extrasolar Planets, Pulsars, Stellar Interiors, Stellar Models, Stellar Motions, Neutron Stars, Periodic Variations, Planetary Systems, Stellar Rotation

Scientific paper

The quasi-periodic timing residuals of PSR1257+12 are considered to be a result of two large-scale internal motions of the neutron star: core-crust relative motion and precession. The model requires that the superfluid core of a neutron star is not pinned to the solid crust. A very good fit to the observations is obtained for the set of parameters that corresponds to a nearly orthogonal rotator, and the period of the core-crust relative rotation that is nearly twice the period of precession.

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