SKA may detect magnetic fields on distant exoplanets

An international team of scientists has published a study suggesting that the SKA (Square Kilometre Array) could detect magnetic fields on distant exoplanets, particularly those orbiting ultracool dwarfs (UCDs). The research discusses how the SKA could be used to study magnetic fields on exoplanets and UCDs, potentially detecting auroral radio signals that could help characterize these planets' magnetic fields, radiation belts, and possible satellites. The study mentions that UCDs are stars smaller and cooler than the sun, and that astronomers have been detecting radio waves from them for several decades. The researchers suggest that the SKA could be used to detect exoplanets only a few times more massive than Earth orbiting UCDs, using observational methods like interferometry and astrometry.

The study highlights that the SKA could be used to detect magnetic fields on exoplanets and UCDs, and that targeted observations could be a viable detection strategy for specific cases, such as monitoring promising exoplanetary systems and the known population of radio-emitting UCDs. The research also mentions that the SKA could potentially detect auroral radio signals and use them to characterize an exoplanet's magnetic field, radiation belt, and possible satellites. The study concludes that targeted observations will be a viable detection strategy in specific cases and that new candidate systems detected in surveys with the SKA and other operating radio telescopes may also be suited to targeted follow-up.

The study discusses how the SKA could build on decades of research into UCD magnetic fields to advance the search for magnetic fields on exoplanets. The researchers use the term "exomoon" only once in the paper and suggest that the SKA could detect exoplanets only a few times more massive than Earth orbiting UCDs. The study also mentions that the SKA could detect auroral radio signals and use them to characterize an exoplanet's magnetic field, radiation belt, and possible satellites. The research concludes that targeted observations will be a viable detection strategy in specific cases and that new candidate systems detected in surveys with the SKA and other operating radio telescopes may also be suited to targeted follow-up.

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