The pulsar synchrotron: coherent radio emission
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...
متن کاملUnraveling the nature of coherent pulsar radio emission
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...
متن کاملSimulated synchrotron emission from Pulsar Wind Nebulae
Aims. A complete set of diagnostic tools aimed at producing synthetic synchrotron emissivity, polarization, and spectral index maps from relativistic MHD simulations is presented. As a first application we consider here the case of the emission from Pulsar Wind Nebulae (PWNe). Methods. The proposed method is based on the addition, on top of the basic set of MHD equations, of an extra equation d...
متن کاملPulsar spectra of radio emission
We have collected pulsar flux density observations and compiled spectra of 281 objects. The database of Lorimer et al. (1995) has been extended to frequencies higher than 1.4 GHz and lower than 300 MHz. Our results show that above 100 MHz the spectra of the majority of pulsars can be described by a simple power law with average value of spectral index < α >= −1.8 ± 0.2. A rigorous analysis of s...
متن کاملDepolarization of Pulsar Radio Emission.
We show that intensity-dependent depolarization of single pulses may be due to the nonlinear decay of the "upper" ordinary (O) mode into an unpolarized extraordinary mode and a backward-propagating wave. The decay occurs in the innermost parts of the pulsar magnetosphere for obliquely propagating O waves.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2009
ISSN: 1745-3925,1745-3933
DOI: 10.1111/j.1745-3933.2009.00651.x