Observations of glitches in PSR 0833-45 and 1641-45

Flanagan, Claire Susan

Title: Observations of glitches in PSR 0833-45 and 1641-45
Creator: Flanagan, Claire Susan
ThesisAdvisor: Nicolson, George
ThesisAdvisor: Baart, Eddie
Subject: Pulsars Neutron stars
Date: 1996
Type: Thesis
Type: Doctoral
Type: PhD
Identifier: vital:5480
Identifier: http://hdl.handle.net/10962/d1005266
Description: An eleven-year series of radio timing observations of 0833- 45 (Vela) and PSR 1641- 45 is presented. During this time, five large spin-ups ("glitches") were observed in 0833- 45 and one in 1641-45. The stellar response to these events is investigated, and the three relat ively long complete inter-glitch intervals in 0833-45 are modeled. The results are of relevance to studies of the interiors of neutron stars. The initial aim of the project - to obtain good observational coverage of large glitches in the Vela pulsar - was successfully achieved, and high quality observations of the periods between glitches were obtained as a by-product. The results of the analysis presented here provide support for the existence of both linear and non-linear coupling in the Vela pulsar, and put a limit on the former in PSR 1641- 45. The recently observed existence of a rapidly recovering component of part of a glitch in Vela was verified in the subsequent glitch, although there is now evidence to contradict the suggestion that this component involves a particular region of the star that is implicated in every glitch. Observations of a recent glitch in the same pulsar have resolved a small component of the spin-up; such a component has not been reported for any other large glitch.
Format: 232 leaves, pdf
Publisher: Rhodes University, Faculty of Science, Physics and Electronics
Language: English
Rights: Flanagan, Claire Susan

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