Cyclotron absorption of radio emission within pulsar magnetospheres

Details Cyclotron absorption of radio emission within pulsar magnetospheres Cyclotron absorption of radio emission within pulsar magnetospheres

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.325..187l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 325, Issue 1, pp. 187-196.

Astronomy and Astrophysics

Astronomy

15

Acceleration Of Particles, Radiation Mechanisms: Non-Thermal, Pulsars: General

Scientific paper

Absorption of radio emission through normal cyclotron resonance within pulsar magnetospheres is considered. The optical depth for cyclotron damping is calculated using a plasma distribution with an intrinsically relativistic spread. We argue that such a broad distribution is plausible for pulsar plasmas and that it implies that a class of pulsars that should have cyclotron damping extends to include young pulsars with shorter periods and stronger magnetic fields. There is no obvious observational evidence for disruption of radio pulses, which implies that the optical depth cannot be too large. We propose that cyclotron resonance may cause marginal absorption of radio emission. It is shown that such marginal absorption produces potentially observable asymmetric features for double-peak pulse profiles with wide separation, with one peak tending to be suppressed.

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