Galaxy-wide radio-induced feedback in a radio-quiet quasar

• Published in: Monthly notices of the Royal Astronomical Society 2017-12, Vol.472 (4), p.4659-4678
• Main Authors: Villar-Martín, M., Emonts, B., Cabrera Lavers, A., Tadhunter, C., Mukherjee, D., Humphrey, A., Rodríguez Zaurín, J., Ramos Almeida, C., Pérez Torres, M., Bessiere, P.
• Format: Article
• Language: English
• Subjects: Active galactic nuclei; Deposition; Feedback; Galaxies; High temperature; Interstellar matter; Ionization; Kinematics; Radio
• ISSN: 0035-8711; 1365-2966
• DOI: 10.1093/mnras/stx2209

Abstract We report the discovery of a radio-quiet type 2 quasar (SDSS J165315.06+234943.0 nicknamed the ‘Beetle’ at z = 0.103) with unambiguous evidence for active galactic nucleus (AGN) radio-induced feedback acting across a total extension of ∼46 kpc and up to ∼26 kpc from the AGN. To the best of our knowledge, this is the first radio-quiet system where radio-induced feedback has been securely identified at ≫several kpc from the AGN. The morphological, ionization and kinematic properties of the extended ionized gas are correlated with the radio structures. We find along the radio axis (a) enhancement of the optical line emission at the location of the radio hotspots (b) turbulent gas kinematics (FWHM ∼ 380–470 km s−1) across the entire spatial range circumscribed by them (c) ionization minima for the turbulent gas at the location of the hot spots, (d) high temperature Te ≳ 1.9 × 104 K at the NE hotspot. Turbulent gas is also found far from the radio axis, ∼25 kpc in the perpendicular direction. We propose a scenario in which the radio structures have perforated the interstellar medium of the galaxy and escaped into the circumgalactic medium. While advancing, they have interacted with in situ gas modifying its properties. Our results show that jets of modest power can be the dominant feedback mechanism acting across huge volumes in radio-quiet systems, including highly accreting luminous AGNs, where radiative mode feedback may be expected.