Speaker
Description
Despite decades of effort, the detection of low-frequency radio emission from exoplanetary systems remains an open challenge. In this talk, we will present recent results from NenuFAR, including a tentative 6σ detection of a radio burst toward the well-studied hot Jupiter system HD 189733. The highly circularly polarized burst is consistent with coherent emission mechanisms such as the cyclotron maser instability (CMI). We explore potential origins including star-planet interactions (SPI), stellar magnetic activity, and background contamination. We will also briefly mention other potential burst candidates detected with NenuFAR from systems hosting exoplanets and brown dwarfs, illustrating both the promise and the current limitations of low-frequency transient searches in the substellar regime.
