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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 L′CO,
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 L′CO for all QSOs, implying
that the far infrared emission is mainly from star formation for QSOs. |
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