A spectacular galactic scale magnetohydrodynamic powered wind in ESO 320-G030

How galaxies regulate nuclear growth through gas accretion by supermassive black holes (SMBHs) is one of the most fundamental questions in galaxy evolution. One potential way to regulate nuclear growth is through a galactic wind that removes gas from the nucleus. It is unclear whether galactic winds...

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Authors: Gorski, M., Aalto, S., Konig, S., Wethers, C.F., Yang, C., Müller, S., Onishi, K., Sato, M., Falstad, N., Mangum, J.G., Linden, S.T., Combes, F., Martín, S., Imanishi, M., Wada, Koji, Barcos Muñoz, L., Stanley, F., García Burillo, S., Van der Werf, P., Evans, A.S., Henkel, C., Viti, S., Harada, N., Díaz Santos, T., Gallagher , J.S., González Alfonso, Eduardo|||0000-0001-5285-8517
Format: article
Publication Date:2024
Country:España
Institution:Universidad de Alcalá (UAH)
Repository:e_Buah Biblioteca Digital Universidad de Alcalá
Language:English
OAI Identifier:oai:ebuah.uah.es:10017/67612
Online Access:http://hdl.handle.net/10017/67612
https://dx.doi.org/10.1051/0004-6361/202348821
Access Level:Open access
Keyword:Galaxies: evolution
Galaxies: ISM
Galaxies: clusters: individual: ESO 320-G030
Galaxies: nuclei
Galaxies: structure
Astronomía
Astronomy
Description
Summary:How galaxies regulate nuclear growth through gas accretion by supermassive black holes (SMBHs) is one of the most fundamental questions in galaxy evolution. One potential way to regulate nuclear growth is through a galactic wind that removes gas from the nucleus. It is unclear whether galactic winds are powered by jets, mechanical winds, radiation, or via magnetohydrodynamic (MHD) processes. Compact obscured nuclei represent a significant phase of galactic nuclear growth. These galaxies hide growing SMBHs or unusual starbursts in their very opaque, extremely compact (r < 100 pc) centres. They are found in approximately 30% of the luminous and ultra-luminous infrared galaxy population. Here, we present high-resolution ALMA observations (similar to 30 mas, similar to 5 pc) of ground-state and vibrationally excited HCN towards ESO 320-G030 (IRAS 11506-3851). ESO 320-G030 is an isolated luminous infrared galaxy known to host a compact obscured nucleus and a kiloparsec-scale molecular wind. Our analysis of these high-resolution observations excludes the possibility of a starburst-driven wind, a mechanically or energy driven active galactic nucleus wind, and exposes a molecular MDH wind. These results imply that the nuclear evolution of galaxies and the growth of SMBHs are similar to the growth of hot cores or protostars where gravitational collapse of the nuclear torus drives a MHD wind. These results mean galaxies are capable, in part, of regulating the evolution of their nuclei without feedback.

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