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  AGN feedback in a galaxy merger: multi-phase, galaxy-scale outflows with a fast molecular gas blob ∼6 kpc away from IRAS F08572+3915

Herrera-Camus, R., Janssen, A., Sturm, E., Lutz, D., Veilleux, S., Davies, R., et al. (2020). AGN feedback in a galaxy merger: multi-phase, galaxy-scale outflows with a fast molecular gas blob ∼6 kpc away from IRAS F08572+3915. Astronomy and Astrophysics, 635: A47. doi:10.1051/0004-6361/201936434.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-50F9-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-50FA-6
Genre: Journal Article

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Herrera-Camus, R., Author
Janssen, A.1, Author              
Sturm, E.1, Author              
Lutz, D.1, Author              
Veilleux, S., Author
Davies, R.1, Author              
Shimizu, T., Author
González-Alfonso, E., Author
Rupke, D. S. N., Author
Tacconi, L., Author
Genzel, R., Author
Cicone, C., Author
Maiolino, R., Author
Contursi, A., Author
Graciá-Carpio, J., Author
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              

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 Abstract: To understand the role that active galactic nuclei (AGN) feedback plays in galaxy evolution, we need in-depth studies of the multi-phase structure and energetics of galaxy-wide outflows. In this work, we present new, deep (∼50 h) NOEMA CO(1-0) line observations of the molecular gas in the powerful outflow driven by the AGN in the ultra-luminous infrared galaxy IRAS F08572+3915. We spatially resolve the outflow, finding that its most likely configuration is a wide-angle bicone aligned with the kinematic major axis of the rotation disk. The molecular gas in the wind reaches velocities up to approximately ±1200 km s−1 and transports nearly 20% of the molecular gas mass in the system. We detect a second outflow component located ∼6 kpc northwest from the galaxy moving away at ∼900 km s−1, which could be the result of a previous episode of AGN activity. The total mass and energetics of the outflow, which includes contributions from the ionized, neutral, and warm and cold molecular gas phases, is strongly dominated by the cold molecular gas. In fact, the molecular mass outflow rate is higher than the star formation rate, even if we only consider the gas in the outflow that is fast enough to escape the galaxy, which accounts for ∼40% of the total mass of the outflow. This results in an outflow depletion time for the molecular gas in the central ∼1.5 kpc region of only ∼3 Myr, a factor of ∼2 shorter than the depletion time by star formation activity.

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 Dates: 2020-03-04
 Publication Status: Published online
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 Identifiers: DOI: 10.1051/0004-6361/201936434
Other: LOCALID: 3223318
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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
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Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 635 Sequence Number: A47 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1