Scientists Detect Radio Emissions from Beta Pictoris b, Hinting at Extraterrestrial Aurora

A team of astronomers employed the MeerKAT radio array in South Africa to capture radio waves that can be linked unequivocally to the exoplanet Beta Pictoris b, ruling out the host star as the source. The signals are circularly polarized, a hallmark of auroral radio emissions, implying that the planet hosts an aurora similar to Earth’s northern lights. From the characteristics of the waves, the researchers inferred a magnetic field strength of over 1,000 gauss, dwarfing Earth’s half-gauss field and surpassing any known solar-system planet.

Beta Pictoris b, with a mass about ten times that of Jupiter, sits near the boundary between giant planets and brown dwarfs, where strong magnetic fields are expected. The study, posted on arXiv.org on September 15, marks a potential first direct measurement of an exoplanet’s magnetic field and opens a new avenue for studying distant worlds. a expert at one outlet described the result as an exciting advancement, pending peer-review confirmation.