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

\n \nScintillation observations of the nearby single millisecond pulsar (MSP) PSR J0030+0451 \nwere carried out with the Parkes 64 m radiotelescope at three different \nepochs in 1999.\nFrom analysis of the dynamic spectrum we obtained the amplitude of the\nelectron density power \nspectrum $\\log \\overline{C_{\\rm N}^2} \\simeq -3.33$ and a scintillation velocity \n$V_{\\rm iss} \\la 15$ km s-1. \nThis result shows that the Shklovskii effect on the spin-down \nrate $\\dot P$ is negligible. We also performed a correlation analysis\nbetween pulsar proper motions (Vpm) and scintillation velocities\n(Viss) using updated measurements for a sample of 77 objects,\n17 of which are MSPs.\nThe full sample shows a correlation coefficient $r_{\\rm s} \\simeq 80\\%$ at an\nextremely high significance level, while for the\nMSP sub-sample (excluding 2 outliers) we obtain $r_{\\rm s} \\simeq 90\\%$.\n\n \n

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