Detect planets through mag field?

  1. Is plausible to use the magnetic field of an exoplanet to detect it?
    Since the field extends much more over space than the body planet it could be much more easy to detect with a radiotelescope
    i ever wondered if astronomers have not tried it already
  2. jcsd
  3. Not all the planets have significant magnetic fiels... the planet must have a liquid core to be possible the detection...
  4. or maybe can be detected indirectly , looking at disturbances in the central star's electromagnetic field ,compared with a no-planets star?
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