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Attribution of radio emission to components in unresolved binaries

Identify which stellar components in the unresolved binary systems 2MASS J04411296+1813194, V1195 Tau, GV Tau A/B, and 2MASS J05122759+2253492 are responsible for the observed 3 GHz radio emission in the Very Large Array Sky Survey Quick Look images.

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Background

VLASS Quick Look images at 2–4 GHz have 2.5 arcsecond resolution, which is insufficient to resolve components in several known binaries. For 2MASS J04411296+1813194, V1195 Tau, GV Tau A/B, and 2MASS J05122759+2253492, the detected radio emission cannot be assigned to a specific component.

Component-level attribution is necessary to interpret correlations with spectral type and evolutionary class, and to evaluate the roles of magnetic activity and binary interactions in generating the detected radio emission.

References

One caveat concerning the analysis of four unresolved binaries (2MASS J04411296+1813194, V1195 Tau, GV Tau A/B, and 2MASS J05122759+2253492) is that we cannot attribute the detection of radio emission specifically to either YSO A or B within the binary (i.e., either or both sources may contribute to the radio emission).

— The Radiowave Hunt for Young Stellar Object Emission and Demographics (RADIOHEAD): A Radio Luminosity${-}$Spectral Type Dependence in Taurus${-}$Auriga YSOs (2501.06188 - Rahman et al., 10 Jan 2025) in Subsection 'Taurus YSOs: bright radio emission detected with VLASS' (Section 3.2)