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25-11-2019
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A spatially resolved CO outflow in IRAS 08572+3915

Submitter: Annemieke Janssen
Description: AGN feedback in a galaxy merger: Multi-phase, galaxy-scale outflows including a fast molecular blob ~6 kpc away from IRAS F08572+3915
Paper accepted for publication in A&A. R. Herrera-Camus, A. Janssen, et al.

The nearby ultra-luminous infrared galaxy IRAS 08572+3915 hosts an active AGN which drives a massive molecular outflow. The molecular gas in this outflow reaches velocities up to 1200 km/s, and transports nearly 20 percent of the molecular mass in the system.

New NOEMA observations of CO(1-0) with 1.4” by 1.1” resolution show that the redshifted outflow consists of two separate components. The first component is part of a biconical outflow from the center of the galaxy. The second component is ~6 kpc away from the galaxy, and may be caused by an earlier AGN episode.

The figure shows the spectrum of the main galaxy, including biconical outflow, at the top. The bottom shows the location of the outflow components with respect to the galaxy. Contours correspond to 3,5, and 10 sigma for the biconical outflow, and 3,5 and 7 sigma for the red blob.
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