The Galactic center chimneys: The base of the multiphase outflow of the Milky Way
G. Ponti, M. R. Morris, E. Churazov, I. Heywood, R. P. Fender

TL;DR
This study reveals the multiphase, magnetically influenced outflow structures called chimneys at the Galactic center, linking multiwavelength observations to the base of the Fermi bubbles and suggesting a complex, dynamic feedback process.
Contribution
It provides new multiwavelength evidence for the structure, composition, and magnetic influence of the Galactic center chimneys, connecting them to the Fermi bubbles and past activity.
Findings
Identification of interconnected X-ray, radio, and infrared features.
Detection of strong shocks and multiphase gas within the chimneys.
Evidence of magnetic fields shaping the outflow structures.
Abstract
Outflows and feedback are key ingredients of galaxy evolution. Evidence for an outflow arising from the Galactic center (GC) has recently been discovered at different wavelength. We show that the X-ray, radio, and infrared emissions are deeply interconnected, affecting one another and forming coherent features on scales of hundreds of parsecs, therefore indicating a common physical link associated with the GC outflow. We debate the location of the northern chimney and suggest that it might be located on the front side of the GC because of a significant tilt of the chimneys toward us. We report the presence of strong shocks at the interface between the chimneys and the interstellar medium, which are traced by radio and warm dust emission. We observe entrained molecular gas outflowing within the chimneys, revealing the multiphase nature of the outflow. In particular, the molecular outflow…
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