Phase stability in the drifting subpulse pattern of PSR 0809 + 74
Observations of PSR 0809 + 74 have been made at 225 MHz to study the stability of its drifting subpulse pattern, and in particular the effect of pulse nulls on the phase of subpulse bands. It is found that a jump of phase occurs at each null. The magnitude of the jump implies that the subpulse bands cease drifting for the duration of the null. If allowance is made for these phase jumps, the periodicity of the subpulse bands varies in the long term by less than one part in 250. The relevance of these results for pulsar models is discussed.
Additional Information© 1978 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Received 1977 August 26. We thank Professor A. Hewish for stimulating discussions which initiated this work, and Dr R. D. Blandford for helpful comments on the text. ACSR gratefully acknowledges the support of the Royal Society Weir Research Fellowship and of a Visiting Research Fellowship at the California Institute of Technology. SCU acknowledges the support of an SRC studentship. This work was supported in part by NSF grant number MPS 73-04677.
Published - mnras182-0711.pdf