Searches for Exoplanetary Radio Emission
Analogous to the Earth and Jupiter in our solar system, magnetized exoplanets are expected to emit intense bursts of coherent radio waves via the electron cyclotron maser (ECM) instability. This mechanism produces narrow-band, up to 100% circularly polarized radiation close to the local electron cyclotron frequency and its harmonics. Detections of exoplanetary ECM emission, therefore, enable one to estimate planetary magnetic field strengths and assess their role in influencing planetary habitability. However, a conclusive detection of exoplanetary ECM emission still eludes us, despite over two decades of extensive searches.
As part of a comprehensive survey of stellar systems for exoplanet-associated ECM emission, Bastian et al. (2018) serendiptously detected a 5-minute-long,
To localize any flare recurrences and conclusively identify their physical origin, we conducted deep
- Suresh, A., Chatterjee, S., Cordes, J. M., Bastian, T. S. & Hallinan, G., "Detection of
2—4 GHzContinuum Emission from ε Eridani", ApJ 904, 138, 2020. [ADS]