Short-lived Radio Bursts from the Crab Pulsar

Abstract

Our high-time-resolution observations reveal that individual main pulses from the Crab pulsar contain one or more short-lived microbursts. Both the energy and duration of bursts measured above 1 GHz can vary dramatically in less than a millisecond. These fluctuations are too rapid to be caused by propagation through turbulence in the Crab Nebula or the interstellar medium; they must be intrinsic to the radio emission process in the pulsar. The mean duration of a burst varies with frequency as ${\nu }^{-2}$, significantly different from the broadening caused by interstellar scattering. We compare the properties of the bursts to some simple models of microstructure in the radio emission region.

34 pages, 10 figures; accepted for publication in ApJ

References in corpus (5)

• Radio Emission Signatures in the Crab Pulsar
• Giant pulses from the Crab pulsar: A wide-band study
• Instantaneous Radio Spectra of Giant Pulses from the Crab Pulsar from Decimeter to Decameter Wavelengths
• Statistical properties of giant pulses from the Crab pulsar
• Bright Giant Pulses from the Crab Nebula Pulsar: Statistical Properties, Pulse Broadening and Scattering due to the Nebula

Cited by in corpus (15)

• Supergiant Pulses from Extragalactic Neutron Stars
• The Crab Pulsar at Centimeter Wavelengths II: Single Pulses
• Radio Emission Physics in the Crab Pulsar
• The Crab Pulsar at Centimeter Wavelengths: I. Ensemble Characteristics
• Pulse Morphology of the Galactic Center Magnetar PSR J1745-2900
• Super-giant pulses from the Crab pulsar : Energy distribution and occurrence rate
• Are FRB Wandering Narrow Beams?
• A broadband radio study of the average profile and giant pulses from PSR B1821-24A
• Observations of Crab Giant Pulses in 20-84 MHz using LWA1
• The quantum vacuum as the origin of the speed of light
• Correlation of Chandra photons with the radio giant pulses from the Crab pulsar
• Narrow-band giant pulses from the Crab pulsar
• Periodic Fast Radio Bursts from Young Neutron Stars
• Analysis of single pulse radio flux measurements of PSR B1133+16 at 4.85 and 8.35 GHz
• Zero-Point Energy Density at the Origin of the Vacuum Permittivity and Photon Propagation Time Fluctuation