A dataset provided by the European Space Agency

Name OT1_pvanderw_4
Title Herschel spectra of low-z QSOs: measuring radiative feedback, radiation pressure and star formation
URL

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DOI 10.5270/esa-jjqj71x
Author van der werf, p.
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 ,
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 ,
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/herschel/
Date Published 2012-12-23T05:21:37Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-12-23T05:21:37Z, OT1_pvanderw_4, SPG v14.2.0. https://doi.org/10.5270/esa-jjqj71x