English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Studying the magnetic fields of exoplanets will provide valuable informationabout their interior structures, atmospheric properties (escape and dynamics),and potential habitability. One of the most promising methods to detectexoplanetary magnetic fields is to study their auroral radio emission. However,there are no confirmed detections of an exoplanet in the radio despite decadesof searching. Recently, Turner et al. 2021 reported a tentative detection ofcircularly polarized bursty emission from the $\tau$ Boo exoplanetary systemusing LOFAR low-frequency beamformed observations. The likely source of thisemission was presumed to be from the $\tau$ Boo planetary system and a possibleexplanation is radio emission from the exoplanet $\tau$ Boo b, produced via thecyclotron maser mechanism. Assuming the emission is from the planet, Turner etal. 2021 found that the derived planetary magnetic field is compatible withtheoretical predictions. The need to confirm this tentative detection iscritical as a conclusive detection would have broad implications forexoplanetary science. In this study, we performed a follow-up campaign on the$\tau$ Boo system using the newly commissioned NenuFAR telescope in 2020. We donot detect any bursty emission in the NenuFAR observations. There are manydifferent degenerate explanations for our non-detection. For example, theoriginal bursty signal may have been caused by an unknown instrumentalsystematic. Alternatively, the planetary emission from $\tau$ Boo b isvariable. As planetary radio emission is triggered by the interaction of theplanetary magnetosphere with the magnetized stellar wind, the expectedintensity of the planetary radio emission varies greatly with stellar rotationand along the stellar magnetic cycle. More observations are needed to fullyunderstand the mystery of the possible variability of the $\tau$ Boo b radioemission.

Follow-up radio observations of the $\tau$ Bo\"{o}tis exoplanetary system: Preliminary results from NenuFAR