| Name | OT1_pvanderw_4 |
| Title | Herschel spectra of low-z QSOs: measuring radiative feedback, radiation pressure and star formation |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342238246&instrument_name=PACS&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-jjqj71x |
| Author | European Space Agency |
| Description | Observations with the SPIRE FTS of the ULIRG-QSO Mrk231 have shown that the CO rotational ladder can be used to separate the contribution of Photon-Dominated Regions (PDRs), powered by star formation, from that of X-ray-Dominated Regions (XDRs), powered by the AGN. We propose to apply this diagnostic to a sample of 5 low-z QSOs with detections in CO, in order to: (1) derive size, density, column density and X-ray illumination of the circumnuclear medium; (2) measure radiative feedback and derive radiation pressure by the AGN on the surrounding medium, in order to probe its ability to drive the recently discovered molecular outflows and disperse the nuclear gas, and to assess its importance for the dynamical support of the circumnuclear medium, which will affect dynamical black hole mass measurements; (3) determine the importance of star formation in the host galaxy for the observed infrared luminosity. Our observations consist of SPIRE-FTS spectra of 5 QSOs, and PACS spectra to measure the higher CO lines in the brightest object only. These observations will address the evolutionary relation between QSOs and ULIRGs and the role of QSOs as drivers for the transition between actively star forming and passive galaxies. They will also constitute a low-z benchmark for future CO observations of high-z QSOs with ALMA, which can only be provided by Herschel, and which is not covered in the current Herschel programme. |
| Publication | On the far-infrared metallicity diagnostics: applications to high-redshift galaxies . Rigopoulou D. et al. . Monthly Notices of the Royal Astronomical Society, Volume 473, Issue 1, p.20-29 . 473 . 10.1093\/mnras\/stx2311 . 2018MNRAS.473...20R , The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder - II. Estimating radial velocity of SPIRE spectral observation sources . Scott Jeremy P. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4894S , The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder - III. Line identification and off-axis spectra . Benson Chris S. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4906B , Stacked Average Far-infrared Spectrum of Dusty Star-forming Galaxies from the Herschel/SPIRE Fourier Transform Spectrometer . Wilson Derek et al. . The Astrophysical Journal, Volume 848, Issue 1, article id. 30, 31 pp. (2017). . 848 . 10.3847\/1538-4357\/aa8cc7 . 2017ApJ...848...30W , L‧CO/LFIR Relations with CO Rotational Ladders of Galaxies Across the Herschel SPIRE Archive . Kamenetzky J. et al. . The Astrophysical Journal, Volume 829, Issue 2, article id. 93, 16 pp. (2016). . 829 . 10.3847\/0004-637X\/829\/2\/93 . 2016ApJ...829...93K , The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder I. The Spectral Feature Finder and Catalogue . Hopwood R. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4874H , AGN impact on the molecular gas in galactic centres as probed by CO lines . Esposito Federico et al. . Monthly Notices of the Royal A... |
| Instrument | SPIRE_SpireSpectrometer_, PACS_PacsRangeSpec_point, SPIRE_SpirePhoto_small |
| Temporal Coverage | 2012-01-27T05:20:14Z/2012-06-23T05:24:26Z |
| Version | SPG v14.2.0 |
| Mission Description | Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities. |
| Creator Contact | https://support.cosmos.esa.int/h®erschel/ |
| Date Published | 2012-12-23T05:21:37Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2012, Herschel Spectra Of Low-Z Qsos: Measuring Radiative Feedback Comma Radiation Pressure And Star Formation, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-jjqj71x |