| Name | OT2_sveilleu_4 |
| Title | Molecular Outflows in Gas-Rich Mergers: The IR-Faint QSOs in the Final Merger Phase |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342247449&instrument_name=PACS&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-4n656v4 |
| Author | veilleux, s. |
| Description | The role of galactic winds in gas-rich mergers is of crucial importance to understand galaxy and supermassive black hole evolution. In the past year, our group has had three major scientific breakthroughs in this area: (1) The PACS discovery of powerful molecular OH winds in several ULIRGs, including Mrk 231. (2) The independent discovery from mm-wave CO interferometric observations in Mrk 231 of a spatially resolved molecular wind with estimated mass outflow rate virgul4x larger than the star formation rate. (3) The detection from optical IFU observations of an equally powerful wide-angle neutral-gas outflow in this same object. These powerful outflows may be the long-sought smoking gun of quasar mechanical feedback purported to transform gas-rich mergers. Indeed, we see possible trends of increasing outflow velocities and decreasing depletion time scales with increasing AGN luminosities in our PACS data. The approved OT1 extension of this program to quasar-dominated ULIRGs will allow us to test these trends. However, by design, this sample does not contain any classic IR-faint QSOs in the critical late merger phases when the quasar has finally gotten rid of its natal cocoon and the effects of feedback are predicted to subside. So here we request 37.2h to obtain high-S/N OH 119 um spectra of 5 IR-faint quasar-dominated late stage mergers. We have a comprehensive set of multiwavelength data on all of these objects, including crucial spatially resolved optical neutral-gas absorption spectroscopy. We will look for trends between the basic measured properties of OH (incidence of absorption, kinematics, column densities) and host/evolutionary indicators. In cases of kinematic match between OH features and spatially resolved neutral-gas clouds, we will be able to infer the masses and kinetic energies of these outflows. Measured velocities in excess of virgul1000 km/s or inferred mass outflow rates much larger than the star formation rates would be telltale signs of AGN-driven winds. |
| Publication |
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| Instrument | PACS_PacsRangeSpec_point |
| Temporal Coverage | 2012-06-26T08:01:30Z/2012-12-21T05:45:53Z |
| 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 | 2013-06-21T01:07:26Z |
| Keywords | Herschel, HSC, submillimetre, far-infrared, HIFI, PACS, SPIRE |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, veilleux et al., 2013, 'Molecular Outflows in Gas-Rich Mergers: The IR-Faint QSOs in the Final Merger Phase', SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-4n656v4 |