Detect planets through mag field?

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Detecting exoplanets through their magnetic fields is considered plausible, as these fields extend significantly beyond the planet itself, potentially making them easier to identify with radio telescopes. However, not all exoplanets possess substantial magnetic fields; a liquid core is typically necessary for detection. There is speculation that indirect methods could be employed, such as observing disturbances in the electromagnetic field of the central star when planets are present compared to stars without planets. The discussion raises questions about whether astronomers have already explored these methods. Overall, the feasibility of using magnetic fields for exoplanet detection remains an intriguing area of research.
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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
 
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Not all the planets have significant magnetic fiels... the planet must have a liquid core to be possible the detection...
 
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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