Establish the emission mechanism of the quiescent radio component

Establish whether the quiescent radio emission of LSPM J0036+1821 originates from a compact gyrosynchrotron source or an extended synchrotron radiation belt.

Background

The persistent, weak radio component detected by the VLA is compatible with both gyrosynchrotron and synchrotron radiation. The source is unresolved, so its spatial extent cannot be determined, and the existing measurements do not uniquely identify the emission mechanism. The paper indicates that a direct constraint on the source size or new linear-polarization observations would be needed to resolve the ambiguity.

References

A direct constraint on the extent of the emitting region or new linear polarization observations are required to establish whether the quiescent emission originates in a compact gyrosynchrotron source or in an extended synchrotron radiation belt.

— A Jupiter-like radio aurora in the L3.5 dwarf LSPM J0036+1821  (2610.09854 - Martín-Carrero et al., 7 Oct 2026) in Section 5.4, Origin of the quiescent emission