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Peculiarities of giant pulses from the crab pulsar at frequencies of 594 and 2228 MHz

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Abstract

We present the results of our simultaneous observations of giant pulses from the Crab pulsar B0531+21 at frequencies of 594 and 2228 MHz with a high (62.5 ns) time resolution. The pulse broadening by scattering was found to be 25 and 0.4 µs at 594 and 2228 MHz, respectively. We obtained the original giant-pulse profiles compensated for interstellar scattering. The measured profile widths at the two frequencies are approximately equal, ≈0.5 µs; i.e., the giant pulses are narrower than the integrated profile by a factor of about 1000. We detected an extremely high brightness temperature of radio emission, T b≥1036 K radio emission, which is higher than the previous estimates of this parameter by five orders of magnitude. The decorrelation bandwidth of the radio-spectrum diffraction distortions has been determined for this pulsar for the first time: 10 kHz at 594 MHz and 300 kHz at 2228 MHz.

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Authors and Affiliations

  1. Astro-Space Center, Lebedev Institute of Physics, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia

    S. V. Kostyuk, M. V. Popov & V. A. Soglasnov

  2. Pushchino Radio Astronomy Observatory, Astrospace Center, Lebedev Institute of Physics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142292, Russia

    V. I. Kondratiev & A. D. Kuzmin

Authors
  1. S. V. Kostyuk
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  2. V. I. Kondratiev
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  3. A. D. Kuzmin
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  4. M. V. Popov
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  5. V. A. Soglasnov
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__________

Translated from Pis’ma v Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 29, No. 6, 2003, pp. 440–447.

Original Russian Text Copyright © 2003 by Kostyuk, Kondratiev, Kuzmin, Popov, Soglasnov.

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Kostyuk, S.V., Kondratiev, V.I., Kuzmin, A.D. et al. Peculiarities of giant pulses from the crab pulsar at frequencies of 594 and 2228 MHz. Astron. Lett. 29, 387–393 (2003). https://doi.org/10.1134/1.1579786

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