The distances to the Galactic Plane of old neutron stars.

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Galaxy: Stellar Content, Stars: Neutron, Pulsars: General

Scientific paper

We compare different methods that have been used to describe the distribution of distances z to the Galactic Plane in pulsar population studies. Numerical solution of the equation of motion in the Solar Neighbourhood for pulsars that all have the same age leads to distributions in z with maxima some distance away from the plane. The z and velocity v_z_ in the z-direction are strongly correlated. Analytic solutions that approximate such z-distribution with a Gaussian do not describe this well. However, we show that the difference between semi-analytical and fully numerical population studies is not large, due to the preferential detection in sky surveys of young and nearby radio pulsars.

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