A magnetic thrust action on small bodies orbiting a pulsar

Details A magnetic thrust action on small bodies orbiting a pulsar A magnetic thrust action on small bodies orbiting a pulsar

2011-06-03

arxiv.org/abs/1106.0659v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

accepted for publication in "Astronomy and Astrophysics"

Scientific paper

We investigate the electromagnetic interaction of a relativistic stellar wind with small bodies in orbit around the star. Based on our work on the theory of Alfv\'en wings to relativistic winds presented in a companion paper, we estimate the force exerted by the associated current system on orbiting bodies and evaluate the resulting orbital drift. This Alfv\'enic structure is found to have no significant influence on planets or smaller bodies orbiting a millisecond pulsar. %influence on the orbit of bodies around a millisecond pulsar. On the timescale of millions of years, it can however affect the orbit of bodies with a diameter of 100 kilometres around standard pulsars with a period $P \sim $1 s and a magnetic field $B \sim 10^{8}$ T. Kilometer-sized bodies experience drastic orbital changes on a timescale of $10^4$ years.

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