Pulsar timing irregularities

Details Pulsar timing irregularities Pulsar timing irregularities

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...260..520g&link_type=abstract

Astrophysical Journal, Part 1, vol. 260, Sept. 15, 1982, p. 520-537.

Astronomy and Astrophysics

Astrophysics

24

Pulsars, Time Measurement, Electromagnetic Scattering, Frequency Measurement, Phase Diagrams, Phase Error, Pulse Rate, Random Walk

Scientific paper

Deviations from the modeling of the gross timing behavior of pulsars by means of a pulse period which linearly increases with time is of interest in the physical modeling of pulsars. Examples of such irregular timing behavior from the Arecibo program are presented. It is noted that the pulse arrival times of PSR 0943 + 10 are well correlated for any given day's observations, which span up to two hours, yet decorrelate on time scales of a day or longer. The reported cases of abrupt frequency changes, including glitches and pseudoglitches, are collected and expanded with further examples. It is found that PSR 1915 + 13 exhibits repeated sharp changes in frequency at a rate of about three per year, consistent with resolved events in a frequency noise process which would predict a measurable frequency second derivative whose rms is exactly the value that is observed.

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