%0 Generic %1 Xia2012 %A Xia, X. Y. %A Gao, Y. %A Hao, C. N. %A Tan, Q. H. %A Mao, S. %A Omont, A. %A Flaquer, B. O. %A Leon, S. %A Cox, P. %D 2012 %K IR QSO gas in molecular %T Molecular Gas in Infrared Ultraluminous QSO Hosts %U http://arxiv.org/abs/1202.6490 %X We report CO detections in 17 out of 19 infrared ultraluminous QSO (IR QSO) hosts observed with the IRAM 30m telescope. The cold molecular gas reservoir in these objects is in a range of 0.2--2.1$10^10M_ødot$ (adopting a CO-to-$H_2$ conversion factor $\alpha_CO=0.8 M_(K km s^-1 pc^2)^-1$). We find that the molecular gas properties of IR QSOs, such as the molecular gas mass, star formation efficiency ($L_\rm FIR/L^\prime_CO$) and the CO (1-0) line widths, are indistinguishable from those of local ultraluminous infrared galaxies (ULIRGs). A comparison of low- and high-redshift CO detected QSOs reveals a tight correlation between L$_FIR$ and $L^\prime_CO(1-0)$ for all QSOs. This suggests that, similar to ULIRGs, the far-infrared emissions of all QSOs are mainly from dust heated by star formation rather than by active galactic nuclei (AGNs), confirming similar findings from mid-infrared spectroscopic observations by Spitzer. A correlation between the AGN-associated bolometric luminosities and the CO line luminosities suggests that star formation and AGNs draw from the same reservoir of gas and there is a link between star formation on $\sim$ kpc scale and the central black hole accretion process on much smaller scales.

@misc{Xia2012, abstract = { We report CO detections in 17 out of 19 infrared ultraluminous QSO (IR QSO) hosts observed with the IRAM 30m telescope. The cold molecular gas reservoir in these objects is in a range of 0.2--2.1$\times 10^{10}M_\odot$ (adopting a CO-to-${\rm H_2}$ conversion factor $\alpha_{\rm CO}=0.8 M_\odot {\rm (K km s^{-1} pc^2)^{-1}}$). We find that the molecular gas properties of IR QSOs, such as the molecular gas mass, star formation efficiency ($L_{\rm FIR}/L^\prime_{\rm CO}$) and the CO (1-0) line widths, are indistinguishable from those of local ultraluminous infrared galaxies (ULIRGs). A comparison of low- and high-redshift CO detected QSOs reveals a tight correlation between L$_{\rm FIR}$ and $L^\prime_{\rm CO(1-0)}$ for all QSOs. This suggests that, similar to ULIRGs, the far-infrared emissions of all QSOs are mainly from dust heated by star formation rather than by active galactic nuclei (AGNs), confirming similar findings from mid-infrared spectroscopic observations by {\it Spitzer}. A correlation between the AGN-associated bolometric luminosities and the CO line luminosities suggests that star formation and AGNs draw from the same reservoir of gas and there is a link between star formation on $\sim$ kpc scale and the central black hole accretion process on much smaller scales. }, added-at = {2012-03-01T22:09:44.000+0100}, author = {Xia, X. Y. and Gao, Y. and Hao, C. N. and Tan, Q. H. and Mao, S. and Omont, A. and Flaquer, B. O. and Leon, S. and Cox, P.}, biburl = {https://www.bibsonomy.org/bibtex/2290e29d32532351b75d8f3ffcebbf656/miki}, description = {[1202.6490] Molecular Gas in Infrared Ultraluminous QSO Hosts}, interhash = {550c2c4f3ca24be7251b49ec6cc66e45}, intrahash = {290e29d32532351b75d8f3ffcebbf656}, keywords = {IR QSO gas in molecular}, note = {cite arxiv:1202.6490Comment: 30 pages, 9 figures, accepted for publication in The Astrophysical Journal}, timestamp = {2012-03-01T22:09:44.000+0100}, title = {Molecular Gas in Infrared Ultraluminous QSO Hosts}, url = {http://arxiv.org/abs/1202.6490}, year = 2012 }