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Accurate astrometry of southern pulsars

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Legge, David(David Robert) (2002) Accurate astrometry of southern pulsars. PhD thesis, University of Tasmania.

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Abstract

This thesis outlines the astrometric measurements of 10 pulsars using phase-referencing Very Long Baseline Interferometry (VLBI) employing telescopes in the Australian Long Baseline Array (LI3A) and Hartbeesthoek observatory. Observations spanned from 1993 to 2001.
A parallax was measured for the Vela pulsar of π = 2.46 ± 0.24 mas placing the pulsar at a distance of 406=44-36 pc. This constitutes the first model independent measurement of the pulsar's distance. This is below the early distance estimates to the pulsar of 500 pc, and above some other more recent estimates. The proper motion was found to be μα cos δ = -50.3 ± 0.4 mas yr-1 and μδ = 29.0 ± 0.2 mas yr-1. This lies between proper motion measurements made using both optical astrometry and phase-referencing VLBI.

Item Type: Thesis (PhD)
Keywords: Very long baseline interferometry, Pulsars
Copyright Holders: The Author
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Copyright 2002 the Author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
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Additional Information:

Thesis (Ph.D.)--University of Tasmania, 2002. Includes bibliographical references

Date Deposited: 19 Dec 2014 02:43
Last Modified: 14 Jul 2017 00:38
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