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JWST interferometric imaging reveals the dusty torus obscuring the supermassive black hole of Circinus galaxy
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JWST interferometric imaging reveals the dusty torus obscuring the supermassive black hole of Circinus galaxy
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Journal Article
JWST interferometric imaging reveals the dusty torus obscuring the supermassive black hole of Circinus galaxy
2026
Overview
The dusty and molecular torus is an elusive structure surrounding supermassive black holes, yet its importance is unequivocal for understanding feedback and accretion mechanisms. The torus and accretion disk feed the inspiraling gas onto the active nucleus, launching outflows that fundamentally connect the active nucleus’s activity to the host galaxy. In this work, we utilize the aperture-masking interferometric mode onboard the JWST to achieve a resolution of 0.08\" at 4.3
μ
m and bring out the fainter features in the central 10 pc of the Circinus galaxy. We show that most of the dust mass is located along the equatorial axis in the form of a 5 × 3 pc disk feeding the active nucleus. Only < 1% of the dust emission arises from an arc structure composed of hot dust entrained in a molecular and ionized outflow, while the extended emission is associated with dust heated by the active galaxy at large scales.
Active galactic nuclei are surrounded by a dusty and molecular disk that fuels supermassive black holes and connects them to their host galaxies. Here, the authors show with JWST interferometric observations that most of the dust in the Circinus galaxies lies in a compact disk, while only a tiny fraction traces hot outflowing material.
