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Correlation Between X-Ray Light-Curve Shape and Radio Arrival Time in the Vela Pulsar

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posted on 2023-05-16, 19:35 authored by Lommen, A, Donovan, J, Gwinn, C, Arzoumanian, Z, Harding, A, Strickman, M, Dodson, R, Peter McCullochPeter McCulloch, Moffett, D
We report the results of simultaneous observations of the Vela pulsar in X-rays and radio from the RXTE satellite and the Mount Pleasant Radio Observatory in Tasmania. We sought correlations between Vela's X-ray emission and radio arrival times on a pulse-by-pulse basis. At a confidence level of 99.8% we have found significantly higher flux density in Vela's main X-ray peak during radio pulses that arrived early. This excess flux shifts to the "trough" following the second X-ray peak during radio pulses that arrive later. Our results suggest that the mechanism producing the radio pulses is intimately connected to the mechanism producing X-rays. Current models using resonant absorption of radio emission in the outer magnetosphere as a cause of the X-ray emission are explored as a possible explanation for the correlation. © 2007. The American Astronomical Society. All rights reserved.

History

Publication title

The Astrophysical Journal

Volume

657

Pagination

436-440

ISSN

0004-637X

Department/School

School of Natural Sciences

Publisher

University of Chicago Press

Place of publication

Chicago, USA

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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