Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.229..223l&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 229, Nov. 15, 1987, p. 223-226.
Astronomy and Astrophysics
Astronomy
39
Angular Velocity, Crab Nebula, Pulsars, Stellar Rotation, Random Processes, Velocity Distribution
Scientific paper
Until last year the pulsar in the Crab Nebula, PSR 0531+21, had suffered two major glitches, or jumps in rotation rate, since it was discovered in 1968. The first, in 1969, involved a fractional change in period of ΔP/P ≈ 10-8 while the second, in 1975, was much larger with ΔP/P ≈ 4×10-8. Observations were not made until several days after each event. This paper reports a third glitch, in 1986 August, detected at Jodrell Bank apparently within 1 hr of the event. This is the first occasion on which the recovery from a glitch in the Crab Pulsar has been observed in detail. The recovery in rotation rate is close to a simple exponential and can be understood in terms of a two-component model of the neutron star.
Lyne Andrew G.
Pritchard R. S.
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