2007/08/18 by T. H. Hankins, J. A. Eilek · 3 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Electrical and Electromagnetic Research #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.1086/522362
26 pages, 10 figures, to appear in ApJ
arxiv created 2007/08/18 · openalex publication_date 2007/11/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
Our high time resolution observations of individual pulses from the Crab pulsar show that both the time and frequency signatures of the interpulse are distinctly different from those of the main pulse. Main pulses can occasionally be resolved into short-lived, relatively narrowband nanoshots. We believe these nanoshots are produced by soliton collapse in strong plasma turbulence. Interpulses at centimeter wavelengths are very different. Their dynamic spectrum contains regular, microsecond-long emission bands. We have detected these bands, proportionately spaced in frequency, from 4.5 to 10.5 GHz. The bands cannot easily be explained by any current theory of pulsar radio emission; we speculate on possible new models.