| 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 | van der werf, p. |
| Description | Observations with the SPIRE FTS of the ULIRG-QSO Mrk231 have shownthat the CO rotational ladder can be used to separate the contributionof Photon-Dominated Regions (PDRs), powered by star formation, fromthat of X-ray-Dominated Regions (XDRs), powered by the AGN.We propose to apply this diagnostic to a sample of 5 low-z QSOs withdetections in CO, in order to:(1) derive size, density, column density and X-ray illumination of thecircumnuclear medium;(2) measure radiative feedback and derive radiation pressure by theAGN on the surrounding medium, in order to probe its ability to drivethe recently discovered molecular outflows and disperse the nuclear gas,and to assess its importance for the dynamical support of thecircumnuclear medium, which will affect dynamical black hole massmeasurements;(3) determine the importance of star formation in the host galaxy forthe observed infrared luminosity.Our observations consist of SPIRE-FTS spectra of 5 QSOs, and PACSspectra to measure the higher CO lines in the brightest object only.These observations will address the evolutionary relation between QSOsand ULIRGs and the role of QSOs as drivers for the transition betweenactively star forming and passive galaxies. They will also constitutea 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 inthe current Herschel programme. |
| Publication |
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| 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 |
| Last Update | 2026-03-02 |
| Keywords | Herschel Space Observatory data, ESA Herschel mission dataset, far-infrared astronomy observations, submillimeter astronomy data, infrared space telescope observations, PACS photometer data, PACS spectrometer data, SPIRE photometer data, SPIRE Fourier transform spectrometer data, HIFI heterodyne spectroscopy data, far-infrared spectroscopy dataset, submillimeter spectral line observations, cold universe observations dataset, star formation infrared data, molecular cloud far-infrared observations, interstellar medium spectroscopy data, protoplanetary disk infrared observations, galaxy evolution far-infrared data, dust emission submillimeter observations, cosmic infrared background measurements, extragalactic infrared survey data, calibrated level 2 data products, FITS files astronomy, spectral cubes far-infrared, flux-calibrated maps, continuum photometry data, spectral energy distribution measurements, ESA Herschel Science Archive data |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, van der werf et al., 2012, 'Herschel spectra of low-z QSOs: measuring radiative feedback, radiation pressure and star formation', SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-jjqj71x |