Summary
Particles accelerated by the e.m. fields existing near a rotating, magnetized neutron star are widely held to be the source of activity of NP 0531, and of the whole Crab Nebula at high frequencies at least. We derive the main features of the radiation from these particles and discuss a) the production of flashes in IR to X-ray bands in the upper magnetosphere, a feature likely associated with any appreciable azimuthal asymmetry of the stellar magnetid field, b) the sweeping of high-energy electrons beyondr ≈ c/Ω and c) the nebular radiation as resulting from the wave field configuration extending unperturbed into the Nebula, the least realistic feature of the model.
Riassunto
La sorgente dell’attività del pulsar NP 0531 e della intera Crab Nebula, almeno ad alte frequenze, è generalmente attribuita a particelle accelerate dei campi e.m. esistenti attorno a una stella di neutroni rotante e magnetizzata. Qui si ricavano le caratteristiche principali dell’irraggiamento di queste particelle e si discutono a) la produzione di impulsi nella banda IR-raggi X, nella parte esterna della magnetosfera, una caratteristica associata con asimmetrie azimutali del campo magnetico della stella, b) lo spazzamento di elettroni energetici al di là del raggior ≈ c/Ω, c) la radiazione nebulare come risultato dell,estensione del campo d’onda coerente entro la Nebula, un’estensione del modello in linea di principio attraente ma poco realistica.
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On leave of absence from Laboratorio Gas Ionizzati, Frascati.
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Cavaliere, A. Acceleration and radiation around oblique rotators. Nuov Cim B 5, 110–118 (1971). https://doi.org/10.1007/BF02737714
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DOI: https://doi.org/10.1007/BF02737714