Giant pulses of the Crab Nebula pulsar as an indicator of a strong electromagnetic wave


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The spectra and visibility functions of giant pulses of the Crab Nebula pulsar derived from VLBI observations carried out through the “RadioAstron” project in 2015 are analyzed. Parameters of the scattering of the pulses in the interstellar medium are measured, namely, the scattering time and decorrelation bandwidth. A comparative analysis of the shapes of the spectra and visibility functions of giant pulses obtained in real observations and via modeling of their scattering is carried out. The results suggest the presence of short bursts (dt < 30 ns) in the structure of the giant pulses at 1668 MHz, whose brightness temperatures exceed 1038 K. These pulses propagate in the pulsar magnetosphere in a strong electromagneticwave regime, leading to the generation of additional radiation perpendicular to the direction of propagation of the giant pulses. This radiation may be associated with anomalous components of the mean pulse profile observed at frequencies above 4 GHz.

作者简介

M. Popov

Astro Space Center, Lebedev Physical Institute

编辑信件的主要联系方式.
Email: mwpopov@gmail.com
俄罗斯联邦, Profsoyuznaya ul. 84/32, Moscow, 117997

A. Rudnitskii

Astro Space Center, Lebedev Physical Institute

Email: mwpopov@gmail.com
俄罗斯联邦, Profsoyuznaya ul. 84/32, Moscow, 117997

V. Soglasnov

Astro Space Center, Lebedev Physical Institute

Email: mwpopov@gmail.com
俄罗斯联邦, Profsoyuznaya ul. 84/32, Moscow, 117997

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