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Paper: Molecular Gas in Nearby Infrared Luminous Quasi-stellar Objects and Radio Galaxies
Volume: 320, The Neutral ISM in Starburst Galaxies
Page: 222
Authors: Evans, A.
Abstract: Two separate millimeter (CO) surveys of molecular gas (H2) in classical quasi-stellar objects (QSOs) and radio galaxies with infrared excesses are summarized. These surveys have established the presence of ∼ 0:5 − 20 × 109 MSolar of star-forming H2 in a significant fraction (∼ 30 − 70%) of the low redshift (z ≤ 0:2) radio galaxies and QSOs. The LIR/L′CO of the QSOs is high relative to local (z < 0:2) IRAS-selected galaxies, indicating either significant AGN heating of the dust or the production of massive stars with high efficiency. Conversely, the radio galaxies have a wide range of LIR/L′CO, with a few having LIR/L′CO and star formation rates comparable to normal spiral galaxies (≤ 5 MSolar yr−1). Imaging observations of both samples reveal a diversity of host galaxy morphologies, indicating that there may be several paths which ultimately lead to the formation of a radio galaxy or QSO.
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