Refractive shift in the position of the pulsar PSR B0329+54, measured at 111, 610, and 2300 MHz


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Abstract

The results of an analysis of timing data for the pulsar PSR B0329+54 obtained in 1968–2012 on the Large Scanning Antenna of the Pushchino Radio Astronomy Observatory at 111 MHz, the 64 m DSS-14 telescope of the Jet Propulsion Laboratory at 2.3 GHz, and the 64 m telescope of the Kalyazin Radio Astronomy Observatory at 610 MHz are presented. The astrometric and spin parameters of the pulsar are derived at a new epoch. The coordinates of the pulsar and its proper motion measured at the three frequencies differ. These differences have a systematic character, and are interpreted as a secular, refractive shift in the apparent position of the pulsar that arises because it is observed through large-scale inhomogeneities of the interstellar medium, leading to variations in the angle of refraction.

About the authors

A. E. Rodin

Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Physical Institute

Email: starovoyt.prao@gmail.com
Russian Federation, Pushchino, Moscow oblast

E. D. Starovoit

Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Physical Institute; Pushchino State Natural Sciences Institute

Author for correspondence.
Email: starovoyt.prao@gmail.com
Russian Federation, Pushchino, Moscow oblast; Pushchino, Moscow oblast

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