Strong AGN feedback onto the ISM and its effects: A SPIRE FTS view of the molecular gas in 3C293

We propose to use the SPIRE FTS to study the large molecular gas reservoir of the powerful radio galaxy 3C293, the scene of a very strong AGN jetgas interaction, and the first known case of shockpowered luminous midJ/highJ CO lines. These were discovered during our large groundbasedCO line survey of Luminous Infrared Galaxies (LIRGs) and AGN hosts, and set this object apart as that with the most excited molecular gas of the entire survey, yet with its large gas reservoir (virgul2x10^9Msol) surprisingly idle in terms of star formation rate (SFRvirgul4Msol/yr).A deep SPIRE FTS spectrum will complete our groundbased CO Spectral Line Energy Distribution (SLED) of this remarkable system and allow excellent constraints to be placed on the thermal state of its molecular gas reservoir and possible suppressing effects of the AGN on star formation in the host galaxy. It will also be the first opportunity to study, locally, powerful AGN mechanical feedback onto the interstellar medium of host galaxies, which will occur frequently in the Early Universe during galaxy formation in the deep gravitational wells of protoclusters marked by such powerful radio galaxies. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]