Narrowband versus broadband emission processes in pulsars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Broadband, Coherent Electromagnetic Radiation, Emission Spectra, Pulsars, Stellar Luminosity, Antenna Radiation Patterns, Bandwidth, Stellar Models

Scientific paper

The paper presents calculations of the upper bound on pulsar luminosities, assuming coherent radiation by an antenna-type mechanism. The narrowband emission spectra and pulsar phenomena accommodated by broadband radiation are discussed, noting that the fast pulsar luminosities demand strong clumping in a high-density relativistic plasma. Overall, broadband coherence accounts best for the range of spectra, pulse shapes, frequencies, and the absence of aberration effects.

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