The Crab Pulsar at Centimeter Wavelengths II: Single Pulses

Abstract

We have carried out new, high-frequency, high-time-resolution observations of the Crab pulsar. Combining these with our previous data, we characterize bright single pulses associated with the Main Pulse, both the Low-Frequency and High-Frequency Interpulses, and the two High-Frequency Components. Our data include observations at frequencies ranging from 1 to 43 GHz with time resolution down to a fraction of a nanosecond. We find at least two types of emission physics are operating in this pulsar. Both Main Pulses and Low-Frequency Interpulses, up to about 10 GHz, are characterized by nanoshot emission - overlapping clumps of narrow-band nanoshots, each with its own polarization signature. High-Frequency Interpulses, between 5 and 30 GHz, are characterized by spectral band emission - linearly polarized emission containing about 30 proportionately spaced spectral bands. We cannot say whether the longer-duration High-Frequency Component pulses are due to a scattering process, or if they come from yet another type of emission physics.

References in corpus (9)

• Radio Emission Signatures in the Crab Pulsar
• Constraints on the Emission Geometries and Spin Evolution of Gamma-ray Millisecond Pulsars
• Optical polarisation of the Crab pulsar: precision measurements and comparison to the radio emission
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• On generation of Crab giant pulses
• Giant Radio Pulses from the Crab Pulsar
• Formation of the Radio Profile Components of the Crab Pulsar
• Mechanism of generation of the emission bands in the dynamic spectrum of the Crab pulsar
• Interpretation of the Low-Frequency Peculiarities in the Radio Profile Structure of the Crab Pulsar

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• Resolving the Emission Regions of the Crab Pulsar's Giant Pulses II. Evidence for Relativistic Motion
• Faraday conversion in pair-symmetric winds of magnetars and Fast Radio Bursts
• Observations of Radio Magnetars with the Deep Space Network
• Inductive spikes in the Crab Nebula - a theory of gamma-ray flares
• Analysis of Multi-Hour Continuous Observations of Seven Millisecond Pulsars
• Particle-in-cell simulations of electron-positron cyclotron maser forming pulsar radio zebras
• Statistics of VHE gamma-Rays in Temporal Association with Radio Giant Pulses from the Crab Pulsar
• Detection of 49 Weak Dispersed Radio Pulses in a Parkes Observation of the X-ray Pulsar PSR J0537$-$6910
• Superdense beaming of axion dark matter in the vicinity of the light cylinder of pulsars
• Single Pulse Dispersion Measure of the Crab Pulsar
• Origin of spectral bands in the Crab pulsar radio emission
• Measurements of the Crab Pulsar's Giant Radio Pulse Amplitude Power-Law Index Using Low-Frequency Arecibo and Green Bank Telescope Observations