Coherent pulsar radio radiation by antenna mechanisms: general theory
نویسندگان
چکیده
منابع مشابه
Coherent Mechanisms of Pulsar Radio Emission
Relativistic plasma masers operating on the anomalous cyclotronCherenkov resonance ω − k‖v‖ + ωB/ γres = 0 and the Cherenkov-drift resonance ω − k‖v‖ − kxud = 0, are capable of explaining the main observational characteristics of pulsar radio emission. Both electromagnetic instabilities are due to the interaction of the fast particles from the primary beam and from the tail of the secondary pai...
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Forty years have passed since the discovery of pulsars, yet the physical mechanism of their coherent radio emission is a mystery. Recent observational and theoretical studies strongly suggest that the radiation outcoming from the pulsar magnetosphere consists mainly of extraordinary waves polarized perpendicular to the planes of pulsar dipolar magnetic field. However, the fundamental question w...
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A non-stationary model of the polar gap discharge in pulsars is reviewed and modiied. It is argued that the polar gap is braking down via a number of localized spark discharges, feeding a corresponding subpulse-associated plasma columns in the pulsar magnetosphere. It is demonstrated that each spark occupies a region of the polar cap with a characteristic dimension approximately equal to the he...
متن کاملCherenkov-Curvature Radiation and Pulsar Radio Emission Generation
Electromagnetic processes associated with a charged particle moving in a strong circular magnetic field are considered in cylindrical coordinates. We investigate the relation between the vacuum curvature emission and Cherenkov emission and argue that, for the superluminal motion of a particle in the inhomogeneous magnetic field in a dielectric, the combined effects of magnetic field inhomogenei...
متن کاملOn the Search for Coherent Radiation from Radio Pulsars
We have examined data from pulsars B0950+08 and B0329+54 for evidence of temporally coherent radiation using the modified coherence function (MCF) technique of Jenet et al. (2001). We consider the influence of both instrumental bandpass and interstellar propagation effects. Even after removal of the effects due to the instrumental bandpass, we detect a signature in the MCF of our PSR B0329+54 d...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1977
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/179.2.189