Astronomers Detect Radio Signals from Beta Pictoris b

The signals originate from Beta Pictoris b, a young gas giant located approximately 63 to 64 light-years from Earth. While radio emissions from planetary systems have been noted previously, scientists have struggled to determine if those signals came from the planets or their host stars. In this case, a team including researchers from the University of Oregon and the Center for Astrophysics | Harvard & Smithsonian unambiguously localized the emission to the planet.

According to Kevin Ortiz Ceballos from the Harvard & Smithsonian’s Center for Astrophysics and his colleagues, the host star is magnetically quiet, and Beta Pictoris b reaches an angular separation of up to 0.55” across its 24-year orbit, making the system an ideal target for radio observations.

Astronomers Detect Faint Signals of Cosmic Hydrogen from the Distant Past

Quasars and the MeerKAT Array Detection

To isolate the signal from the host star, Beta Pictoris, the team used the MeerKAT radio telescope array across four separate observing sessions in 2025 and 2026. The researchers used quasars as reference points—extremely bright, magnetized galaxy cores—to triangulate the exact source of the broadcasts.

The observations revealed rapid, recurring, and strongly circularly polarized radio bursts, alongside persistent emission. These signals occurred at frequencies between 0.8 and 3.5 GHz.

Magnetic Field Strength and Auroral Activity

The detected radio bursts are the result of Electron Cyclotron Maser Instability (ECMI), a process that generates auroras on Earth and Jupiter. This occurs when charged particles interact with a planet’s magnetic field and atmosphere to release energy. Because the frequency of these emissions is linked to the strength of the magnetic field, the 3.5 GHz detection allowed scientists to calculate a minimum magnetic field strength of 1.25 kilogauss (or 1,250 gauss) at the emission site.

Astronomers Discover Massive Exoplanet GJ 523b That Defies Formation Models

This measurement reveals a field considerably stronger than Jupiter’s and thousands of times stronger than Earth’s.

Beta Pictoris b System Characteristics

First discovered back in 2008, Beta Pictoris b is a massive gas giant with a mass of about 12 times that of Jupiter.

The system is very young, with an age of only 23 million years, and hosts a debris disk plus at least three giant planets: Beta Pictoris b, c, and d.

Astronomers detect fastest known star in Milky Way

Expanding the Search for Giant Exoplanets

This discovery establishes a new method for studying the internal and atmospheric processes of distant worlds without relying solely on movement or atmospheric data.

The findings remain preliminary, as the research has been posted to the arXiv preprint server (Ceballos et al., arXiv, 2026) but has not yet undergone peer review. Researchers emphasize that the signals are linked to natural auroral activity and are not evidence of extraterrestrial life. This distinguishes the finding from the traditional approach in the search for extraterrestrial intelligence (SETI), which has sought radio signals from exoplanets in habitable zones since Frank Drake pioneered the search in 1960.