Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.346..822m&link_type=abstract
Nature (ISSN 0028-0836), vol. 346, Aug. 30, 1990, p. 822-824.
Astronomy and Astrophysics
Astronomy
85
Magnetic Field Configurations, Pulsars, Radio Bursts, Astronomical Models, Stellar Magnetic Fields
Scientific paper
A glitch has been observed in the Vela pulsar PSR 0833-45, the first time that a glitch has been caught as it happened. The period decrease occurred without warning and in less than 2 min; an exponential recovery similar to previously observed postglitch behavior began immediately. Observations were made at 635 MHz and 950 MHz; the lower frequency signal showed an additional delay starting at the time of the glitch and continuing for about 35 days. This behavior is consistent with a small increase in dispersion measure or a change in the pulsar's magnetic field configuration. After the glitch, the arrival times of pulses at both frequencies differed from the smoothly predicted times according to a damped sinusoidal oscillation with a period of about 25 days.
Hamilton Peter A.
King Edward A.
McConnell David
McCulloch Peter M.
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