The Close AGN Reference Survey (CARS). Discovery of a global [C II] 158 μm line excess in AGN HE 1353-1917

June 2019 • 2019A&A...626L...3S

Authors • Smirnova-Pinchukova, I. • Husemann, B. • Busch, G. • Appleton, P. • Bethermin, M. • Combes, F. • Croom, S. • Davis, T. A. • Fischer, C. • Gaspari, M. • Groves, B. • Klein, R. • O'Dea, C. P. • Pérez-Torres, M. • Scharwächter, J. • Singha, M. • Tremblay, G. R. • Urrutia, T.

Abstract • The [C II]λ158 μm line is one of the strongest far-infrared (FIR) lines and an important coolant in the interstellar medium of galaxies that is accessible out to high redshifts. The excitation of [C II] is complex and can best be studied in detail at low redshifts. Here we report the discovery of the highest global [C II] excess with respect to the FIR luminosity in the nearby AGN host galaxy HE 1353-1917. This galaxy is exceptional among a sample of five targets because the AGN ionization cone and radio jet directly intercept the cold galactic disk. As a consequence, a massive multiphase gas outflow on kiloparsec scales is embedded in an extended narrow-line region. Because HE 1353-1917 is distinguished by these special properties from our four bright AGN, we propose that a global [C II] excess in AGN host galaxies could be a direct signature of a multiphase AGN-driven outflow with a high mass-loading factor.


IPAC Authors


Phil Appleton

Senior Scientist