Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.275l..16l&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 275, Issue 2, pp. L16-L18.
Astronomy and Astrophysics
Astronomy
17
Methods: Statistical, Stars: Kinematics, Stars: Magnetic Fields, Stars: Neutron, Pulsars: General
Scientific paper
From a sample of 98 radio pulsars with reliable kinematic measurements, we re-examine the evidence for a correlation between the transverse speed V_t and the inferred dipole magnetic field strength B. We find the correlation to be only marginally significant and, most importantly, find no evidence for a correlation amongst the pulsars younger than 3Myr. Since such pulsars are relatively unaffected by spatial selection effects, we conclude that there is no causal V-B correlation. The trend seen by previous authors amongst a smaller sample of predominantly older pulsars, and in the old pulsars of the new sample, can largely be explained by the relatively short time-scales on which pulsars of high magnetic field lose rotational kinetic energy, and hence radio luminosity, compared to those with weaker magnetic fields. It is also possible that some weak magnetic field, low-velocity pulsars in the sample have had a different evolutionary history from the bulk of the population.
Anderson Brandon
Lorimer Dunc. R.
Lyne Andrew G.
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