Dice Question Streamline Icon: https://streamlinehq.com

Flaring versus rotation-modulated origin of HD 245567’s coherent emission

Determine whether the highly circularly polarized 3–4 GHz radio emission observed from the solar-type star HD 245567 is associated with flaring behavior or is rotation-modulated electron cyclotron maser emission unrelated to individual flares.

Information Square Streamline Icon: https://streamlinehq.com

Background

HD 245567, a weak-line T Tauri star, exhibits strong circular polarization (>80% in some bands), indicating coherent emission likely due to electron cyclotron maser emission (ECME). ECME can arise from flare-accelerated electrons trapped in coronal loops or from rotation-modulated magnetospheric processes.

Clarifying whether the detected coherent emission is flare-driven or rotation-modulated is necessary for interpreting the star’s magnetic field topology, activity cycle, and the applicability of coronal scaling relations.

References

Because of this, it is unclear whether this emission is associated with flaring behavior or if it is rotation-modulated emission.

— Detection of Radio Emission from Super-flaring Solar-Type Stars in the VLA Sky Survey (2408.14612 - Davis et al., 26 Aug 2024) in Section 4.1 (The VLASS-detected Stars), Subsubsection “HD 245567”