Peculiarities of giant pulses from the crab pulsar at frequencies of 594 and 2228 MHz |
| |
| Authors: | S V Kostyuk V I Kondratiev A D Kuzmin M V Popov V A Soglasnov |
| |
| Institution: | (1) Astro-Space Center, Lebedev Institute of Physics, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia;(2) Pushchino Radio Astronomy Observatory, Astrospace Center, Lebedev Institute of Physics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142292, Russia |
| |
| 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, Tb≥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. |
| |
| Keywords: | pulsars giant pulses scattering |
| 本文献已被 SpringerLink 等数据库收录！ |
|
