On the possibility of radio emission of planets around pulsars

Details On the possibility of radio emission of planets around pulsars On the possibility of radio emission of planets around pulsars

2011-06-06

arxiv.org/abs/1106.0981v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

Accepted for pulbication in the (reviewed) proceedings of the International Workshop on Planetary, Solar and Heliospheric Radi

Scientific paper

A planet orbiting around a pulsar would be immersed in an ultra-relativistic under-dense plasma flow. It would behave as a unipolar inductor, with a significant potential drop along the planet. As for Io in Jupiter's magnetosphere, there would be two stationary Alfv\'en waves, the Alfv\'en wings (AW), attached to the planet. The AW would be supported by strong electric currents, in some circumstances comparable to those of a pulsar. It would be a cause of powerful radio waves emitted all along the AW, and highly collimated through relativistic aberration. There would be a chance to detect these radio-emissions from Earth. The emission would be pulses as for ordinary pulsars; their occurrence would depend on the planet-star-observer angle. These results are still preliminary, further work needs to be done.

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