First Radio Signal Detected From Exoplanet
Astrophysicists identified radio bursts originating from Beta Pictoris b, a gas giant 64 light-years away, likely caused by massive auroras.
In a groundbreaking discovery, scientists have detected the first-ever radio signal emanating from a planet outside our solar system. The signal originates from Beta Pictoris b, a gas giant exoplanet located approximately 64 light-years from Earth.
A team of astrophysicists from Harvard and the University of Oregon identified distinct radio bursts that they believe are produced by extensive auroras on the planet, according to a research paper that has not yet undergone peer review.
Auroras, visible as glowing light displays near a planet's poles, are formed when energetic particles interact with a planet's atmosphere and magnetic field. These emissions can generate radio waves.
Beta Pictoris b is described as a young, massive exoplanet, weighing about 12 times more than Jupiter. The researchers utilized the MeerKAT radio telescope array, a facility comprising 64 interconnected satellite dishes in South Africa, to capture the signals.
After confirming the radio emissions originated from the planet itself, rather than its host star, the team traced the source to auroral radio emissions. This detection also allowed scientists to measure Beta Pictoris b's magnetic field.
The strength of the planet's magnetic field was measured at 1,250 gauss, significantly stronger than Jupiter's 4.3-gauss magnetic field. This marks the first measurement of a magnetic field for an exoplanet. Magnetic fields are crucial for protecting a planet's atmosphere from being stripped away by stellar winds.
The research team plans to apply similar methods to study other large exoplanets, aiming to further understand planetary characteristics and the potential for life beyond our solar system.