A burst emission mechanism for coherent radiation from pulsars

Details A burst emission mechanism for coherent radiation from pulsars A burst emission mechanism for coherent radiation from pulsars

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.308..826h&link_type=abstract

Nature (ISSN 0028-0836), vol. 308, April 26, 1984, p. 826-828.

Physics

5

Coherent Radiation, Neutron Stars, Pulsars, Radio Bursts, Stellar Models, Stellar Radiation, Gas Jets, Granular Materials, Magnetospheres, Plumes, Polar Caps, Stellar Magnetic Fields, Stellar Rotation

Scientific paper

A new mechanism of burst emission is proposed which initiates at the surface of a neutron star and occurs naturally without postulating the existence of special conditions. It is argued that the induced electric field in the near magnetosphere of a rotating neutron star is sufficiently strong to detach moderately large grains of solid matter from the surface in the polar cap regions. The detached grains erupt and form ascending thread-like plumes or jets of dense and highly charged gas about 100 cm or more long. These plumes accelerate along the open magnetic field lines and emit intense partially coherent radiation at radio frequencies with a low-frequency cutoff at c/h. This model accounts for the principal characteristics of the observed radiation from pulsars at radio frequencies.

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