Does the compact radio jet in PG 1700+518 drive a molecular outflow?
RUNNOE J.C., GULTEKIN K. and RUPKE D.S.N.
Abstract (from CDS):
Radio jets play an important role in quasar feedback, but direct observations showing how the jets interact with the multi-phase interstellar medium of galaxy disks are few and far between. In this work, we provide new millimeter interferometric observations of PG 1700+518 in order to investigate the effect of its radio jet on the surrounding molecular gas. PG 1700 is a radio-quiet, low-ionization broad absorption line quasar whose host galaxy has a nearby interacting companion. On subkiloparsec scales, the ionized gas is driven to high velocities by a compact radio jet that is identified by radio interferometry. We present observations from the NOrthern Extended Millimeter Array (NOEMA) interferometer with a 3.''8 (16 kpc) synthesized beam where we detect the CO(1 0) emission line at 30σ significance with a total flux of 3.12 ± 0.02 Jy km s–1 and a typical velocity dispersion of 125 ± 5 km s–1. Despite the outflow in ionized gas, we find no concrete evidence that the CO gas is being affected by the radio jet on size scales of a kiloparsec or more. However, a ∼1'' drift in the spatial centroid of the CO emission as a function of velocity across the emission line and the compact nature of the jet hint that higher spatial resolution observations may reveal a signal of interaction between the jet and molecular gas.