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A possible mechanism for flattening of pulsar spectra at high frequencies

Published online by Cambridge University Press:  12 April 2016

I.F. Malov
I.F. Malov*
Affiliation:
Pushchino Radio Astronomy Observatory, Lebedev Physical Institute, 142292, Pushchino, Russia

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Pulsar spectra have three characteristic parts: a low frequency turnover (the region of the maximum), a linear part with a constant spectral index, and a high frequency cut-off (after it the spectrum becomes considerably steeper) (Malofeev et al. 1994). These three parts can be described in the frame of the usual model of curvature radiation (Malov 1979; Ochelkov & Usov 1984; Kuz’min & Solov’ev 1986; Malov & Malofeev 1991). Kramer et al. (1997) have found a flattening in the spectra of 4 pulsars at frequencies above 30 GHz. It cannot be understood in such model. We propose the possible explanation for the unusual behaviour of these spectra.

Type
Part 6. Emission and Plasma Theory
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 395 - 396
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

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