Mid-Infrared diversity in nearby AGN: New insights from JWST/MIRI

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• Cristina Ramos-Almeida (Astrofísica de Canarias)
• Tuesday 19 August 2025, 10:00-11:00
• Ryle Seminar Room, KICC + online.

If you have a question about this talk, please contact Sandro Tacchella.

Type-2 quasars (QSO2s) are luminous active galactic nuclei characterized by narrow optical emission lines. They are the torus-obscured counterparts of type-1 quasars, although in some cases, part of the obscuration arises from galactic scales. Thanks to JWST , it is now possible to study the properties of nuclear gas and dust in local AGN with unprecedented spatial and spectral resolution and sensitivity. In this talk, I will present recent results from Cycle 2 JWST /MIRI observations of nearby QSO2s from the QSOFEED sample, which revealed a striking diversity of mid-infrared spectral shapes and features, and compare them with JWST /MIRI data of Seyfert galaxies from the Galactic Activity, Torus, and Outflow Survey (GATOS). Our findings highlight the complexity of these nuclear environments and underscore the need for larger JWST samples to disentangle the roles of obscuration, ionizing continuum, gas density, and other factors in shaping their mid-infrared spectra.

This talk is part of the Galaxies Discussion Group series.

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