| Name | DDT_hspoon_2 |
| Title | Herschel.s first and last chance to quantify the two most powerful molecular outflows in the Local Universe |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342262940&instrument_name=PACS&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-6fsucfa |
| Author | spoon, h. |
| Description | As part of the Herschel ULIRG Survey (HERUS) we have recently discovered within two objects extraordinarily powerful molecular outflows in OH. These outflows are substantially more powerful than those seen in Mrk231, which was the most powerful outflow source known to date. These two sources, IRAS 03158+4227 and IRAS 20100-4156, may thus host the two most powerful molecular outflows known in the Local Universe. The properties of these outflows have fundamental implications for understanding how AGN affect their environments. On a focused level, the AGN in these two sources are much more obscured than the AGN in Mrk231, implying that we may have caught these outflows in their earliest, most powerful phase. On a wider level, the impact of AGN outflows is thought to be critical in shaping the galaxy mass function at all redshifts, so the properties of these very powerful outflows in these two systems may be vital in understanding this impact. At the moment, however, we lack the data needed to constrain the properties of the outflows. We discovered the outflow signatures in the line profiles of the groundstate transitions of OH at 79 and 119 microns. From these two observations the total OH column density and covering factor of the outflow can be inferred, but not the all-important mass outflow rate and timescale. To do so, we need observations of the doublets of excited OH at 65 and 84 micron, since these excited levels are sensitive to the FIR radiation density around the source, and thus to the compactness of the outflow. Herschel is the only facility in the foreseeable future that can provide these data. |
| Publication |
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| Instrument | PACS_PacsRangeSpec_point |
| Temporal Coverage | 2013-02-05T01:09:17Z/2013-03-20T14:55:12Z |
| 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 | 2013-09-20T13:49:43Z |
| Keywords | Herschel, HSC, submillimetre, far-infrared, HIFI, PACS, SPIRE |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, spoon et al., 2013, 'Herschel.s first and last chance to quantify the two most powerful molecular outflows in the Local Universe', SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-6fsucfa |