Séminaire/Seminar Galaxies |
| « The multiphase circumnuclear region of Centaurus A - from JWST/MIRI MRS observations » |
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Lorenzo Evangelista |
| Galaxy evolution is regulated by gas accretion, mergers, and feedback: processes that operate across a broad range of spatial scales. Gas inflows into galaxies fuels star formation and, in the central regions, feed the SMBH, triggering phases of active galactic nucleus (AGN) activity. AGNs inject vast amounts of energy into their surroundings, heating the interstellar medium (ISM) and driving outflows, thus regulating star formation and limiting the growth of massive galaxies. However, infrared observations reveal that AGN activity also induces efficient cooling of the molecular gas. Understanding how AGN feedback couples to the ISM is essential for solving key problems in AGN feeding, feedback cycles, and the regulation of galaxy growth. I present JWST/MIRI MRS integral-field spectroscopy of H2 emission over the central 170 pc x 100 pc at 0.3"–0.7" (5–12 pc) resolution. My results show complex morpho-kinematics for H2,, with strongly inhomogeneous excitation, a scale-dependent interplay between radiative heating and mechanical cooling, an overall strong impact of turbulence on gas excitation, and the coexistence of inflows and outflows of gas at the same scale. |
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jeudi 18 décembre 2025 - 11:30 Salle 281 Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |