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Paper: Molecuar Gas in Infrared Ultraluminous QSOs
Volume: 446, Galaxy Evolution: Infrared to Millimeter Wavelength Perspective
Page: 43
Authors: Xia, X.-Y.
Abstract: We report the detections of molecular gas in 15/19 infrared ultraluminous QSOs (IR QSOs) using the IRAM 30m. The gas reservoir in these objects is several times 109M to 1010M that is much higher than those of optically selected Palomar-Green QSOs. In addition, the star formation efficiency, indicating by LFIR and LCO, and the CO (1-0) line widths for IR QSOs are similar to those of ULIRGs. With a typical star formation rate of few times 100 myear, the cold molecular gas will be consumed within several times 107 to 108 years. By comparing with low-z and high-z CO detected QSOs, we find that there exists tight correlation between LFIR and LCO for all QSOs, implying that the far infrared emission is mainly from star formation for QSOs.
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