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Allen, Bryce

This study presents phase-coherent timing solutions for three normal pulsars and a phase-connected timing solution from limited observations for one millisecond pulsar using the CHIME interferometric radio telescope. All were discovered by recent surveys taken with the Arecibo and Green Bank telescopes. Two of the normal pulsars, designated J1945+1740 and J1859+7654, were found to have relatively low spin-down rates of P ̇=0.031(11)×10−15s and P ̇=0.03892(94)×10−15s respectively,leading to substantial characteristic ages of 307(107) Myr and 565(13) Myr. The third normal pulsar, called J0747+6646, was found to have a slightly above average characteristic age of 9.4875(50) Myr, but is overall typical in spin-down rate and period. The millisecond pulsar, designated J1935+11, exhibited deviations in its period, suggesting the presence of a companion with minimum mass MC ≥ 0.003M⊙. An isolated timing model was used to obtain a solution with χR2 = 12.8, which indicates further observations will be required to obtain a better solution and to fully determine the binary status.

Text

University of British Columbia. ASTR 449

Vancouver : University of British Columbia Library

10.14288/1.0413655

Science, Faculty of; Physics and Astronomy, Department of

Undergraduate

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