Mid-Infrared Spectral Properties of IR QSOs
- Center of Astrophysics, Tianjin Normal University, 300387 Tianjin (China)
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)
- Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL (United Kingdom)
- College of Physical Science, Graduate School of Chinese Academy of Sciences, 100049 Beijing (China)
We analyse mid-infrared (MIR) spectroscopic properties for 19 ultra-luminous infrared quasars (IR QSOs) in the local universe based on the spectra from the Infrared Spectrograph on board the Spitzer Space Telescope. The MIR properties of IR QSOs are compared with those of optically-selected Palomar-Green QSOs (PG QSOs) and ultra-luminous infrared galaxies (ULIRGs). The average MIR spectral features from {approx}5 to 30 {mu}m, including the spectral slopes, 6.2 {mu}m PAH emission strengths and [NeII] 12.81 {mu}m luminosities of IR QSOs, differ from those of PG QSOs. In contrast, IR QSOs and ULIRGs have comparable PAH and [NeII] luminosities. These results are consistent with IR QSOs being at a transitional stage from ULIRGs to classical QSOs. We also find the correlation between the EW (PAH 6.2 {mu}m) and outflow velocities suggests that star formation activities are suppressed by feedback from AGNs and/or supernovae.
- OSTI ID:
- 21251495
- Journal Information:
- AIP Conference Proceedings, Vol. 1059, Issue 1; Conference: 5. Sino-Italian workshop on relativistic astrophysics, Taipei-Hualien, Taiwan (China), 28 May - 1 Jun 2008; Other Information: DOI: 10.1063/1.3012267; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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