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

I. Smirnova-Pinchukova , B. Husemann , G. Busch , P. Appleton , M. Bethermin (1) , F. Combes , S. Croom , T. A. Davis , C. Fischer , M. Gaspari , B. Groves , R. Klein , C. P. O'Dea , M. Pérez-Torres , J. Scharwächter , M. Singha , G. R. Tremblay , T. Urrutia

1 LAM - Laboratoire d'Astrophysique de Marseille

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.

Mots clés: galaxies: Seyfert; galaxies: star formation; ISM: jets and outflows; infrared: ISM

Domaines: Planète et Univers [physics]; Astrophysique [astro-ph]

I. Smirnova-Pinchukova, B. Husemann, G. Busch, P. Appleton, M. Bethermin, et al.. The Close AGN Reference Survey (CARS). Discovery of a global [C II] 158 μm line excess in AGN HE 1353-1917. Astronomy and Astrophysics - A&A, 2019, 626, ⟨10.1051/0004-6361/201935577⟩. ⟨insu-03666746⟩