Strange radio signals from red dwarfs could be the start of a whole new way to look for exoplanets.
which may also have been generated by an exoplanet. “There’s so much about [red] dwarfs we don’t understand,” he says, so these readings could also be explained by stellar physics that we don’t yet comprehend.Though stars are usually radio-dim, the most active ones—those that have many solar flares and coronal mass ejections—often produce radio signals.
It’s hard for a star to produce these kind of radio signals, Callingham says, “that’s how we knew we’re on to something really special.” Though striking, this is the lesser contributor to Jupiter’s radio emissions. The main method is the motion of Io around the planet, which creates a kind of huge electric generator.
Astronomers think exoplanets and their host stars could be playing out this Jupiter-Io interaction to generate radio signals which should cycle over time like Jupiter’s.
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