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http://hdl.handle.net/20.500.12386/32205
Title: | AGN feeding and feedback in Fornax A: kinematical analysis of the multi-phase ISM | Authors: | MACCAGNI, FILIPPO MARCELLO SERRA, PAOLO GASPARI, MASSIMO Kleiner, D. Morokuma-Matsui, K. Oosterloo, T. A. Onodera, M. Kamphuis, P. Loi, F. Thorat, K. Ramatsoku, M. Smirnov, O. White, S. V. |
Issue Date: | 2021 | Journal: | ASTRONOMY & ASTROPHYSICS | Number: | 656 | First Page: | A45 | Abstract: | We present a multi-wavelength study of the gaseous medium surrounding the nearby active galactic nucleus (AGN), Fornax A. Using MeerKAT, ALMA, and MUSE observations, we reveal a complex distribution of the atomic (H I), molecular (CO), and ionised gas in its centre and along the radio jets. By studying the multi-scale kinematics of the multi-phase gas, we reveal the presence of concurrent AGN feeding and feedback phenomena. Several clouds and an extended 3 kpc filament - perpendicular to the radio jets and the inner disk (r ≲ 4.5 kpc) - show highly-turbulent kinematics, which likely induces non-linear condensation and subsequent chaotic cold accretion (CCA) onto the AGN. In the wake of the radio jets and in an external (r ≳ 4.5 kpc) ring, we identify an entrained massive (∼10^7 M⊙) multi-phase outflow (vOUT ∼ 2000 km s^−1). The rapid flickering of the nuclear activity of Fornax A (∼3 Myr) and the gas experiencing turbulent condensation raining onto the AGN provide quantitative evidence that a recurrent, tight feeding and feedback cycle may be self-regulating the activity of Fornax A, in agreement with CCA simulations. To date, this is one of the most in-depth probes of such a mechanism, paving the way to apply these precise diagnostics to a larger sample of nearby AGN hosts and their multi-phase inter stellar medium. | URI: | http://hdl.handle.net/20.500.12386/32205 | URL: | https://www.aanda.org/articles/aa/full_html/2021/12/aa41143-21/aa41143-21.html http://arxiv.org/abs/2108.05247v1 |
ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/202141143 | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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aa41143-21-red.pdf | Pdf editoriale | 2.07 MB | Adobe PDF | View/Open |
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