Scintillation measurements of the millisecond pulsar PSR J0030+0451 and pulsar space velocities

Scintillation observations of the nearby single millisecond pulsar (MSP) PSR J0030+0451 were carried out with the Parkes 64 m radiotelescope at three different epochs in 1999. From analysis of the dynamic spectrum we obtained the amplitude of the electron density power spectrum and a scintillation velocity km s-1. This result shows that the Shklovskii effect on the spin-down rate is negligible. We also performed a correlation analysis between pulsar proper motions (Vpm) and scintillation velocities (Viss) using updated measurements for a sample of 77 objects, 17 of which are MSPs. The full sample shows a correlation coefficient at an extremely high significance level, while for the MSP sub-sample (excluding 2 outliers) we obtain .