Program: GN-2019B-Q-321

AGN feedback can regulate gas cooling, star formation, and thus galaxy growth. However, observational evidence for both galactic winds driven by quasar-like AGN and gas heating by an AGN's radio jet has only been observed in the most powerful sources. SDSS photometry and spectroscopy and CO(1-0) imaging allowed Janssen et al. (2012) to identify a sample of low-power radio galaxies, which have blue optical colors, high molecular gas masses, but a very low star formation efficiency. These properties are reminiscent of rare, gas-rich radio galaxies in which the AGN radio jet suppresses star formation by injecting turbulent energy. However these galaxies have not developed an optically bright (quasar-like) AGN component, which commonly seen in gas-rich galaxies, and have a $>5$ times lower radio power. One explanation may be that the molecular gas has been shocked during past AGN episodes and is too warm and turbulent to be accreted into the black hole. To test this hypothesis we propose to search for shocked molecular gas -- warm H2 using NIR spectroscopy with Gemini's GNIRS.