Radiative or two-stream instability as a source for pulsar radio emission
1983; IOP Publishing; Volume: 266; Linguagem: Inglês
10.1086/160770
ISSN1538-4357
Autores Tópico(s)Astrophysics and Cosmic Phenomena
Resumoview Abstract Citations (60) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Radiative or two-stream instability as a source for pulsar radio emission Asseo, E. ; Pellat, R. ; Sol, H. Abstract Pulsar radio emission origins are discussed for the suggested cases of radiative electromagnetic instability, produced by a single relativistic stream flowing along a curved path, and two-stream instability, due to the interaction between positron and electron beams created above the polar caps. These physical mechanisms are tested by means of calculations for pulsars where the beams are finite in extent, curved (because they are field-aligned), and immersed in the external plasma or vacuum. In the terms of the present description, the narrow band emission process is favored, and considerable latitude exists in specifying the particle densities and energies. The electromagnetic energy radiated through the beam boundaries is found to be incompatible with pulsar radio luminosity, unless the expected beams are denser and constituted by particles more energetic than those entertained in the existing literature. Publication: The Astrophysical Journal Pub Date: March 1983 DOI: 10.1086/160770 Bibcode: 1983ApJ...266..201A Keywords: Magnetohydrodynamic Flow; Particle Acceleration; Pulsars; Radio Stars; Relativistic Particles; Electromagnetic Radiation; Magnetohydrodynamic Stability; Magnetospheres; Polar Caps; Radio Emission; Stellar Models; Astrophysics full text sources ADS |
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