| Name | DDT_ebergin_9 |
| Title | DDT request to observe the Herschel/HIFI ULine in the Orion Bar and W49 |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342244038&instrument_name=HIFI&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-yrili9k |
| Author | bergin, e. |
| Description | One of the key science goals of the HIFI instrument on Herschel has beenthe ability to quickly perform unbiased spectral line surveys. Thehoped-for outcome, besides the analysis of known molecules throughmultiple lines, has been the detection of previously unknown species. Andindeed, a number of unidentified lines have been found, both inemission and in absorption. The most spectacular, but also mostpuzzling of these is the 617 GHz absorption line feature first foundtoward SgrvirgulB2 and now seen in absorption towards other galactic sources.It is the only U-line found that does not trace the core or envelope ofSgrvirgulB2, but rather the gas in the line-of-sight clouds in the spiral arms and Galactic center, between us and SgrvirgulB2. At present there is no knowncarrier for this feature.We request DDT observing time to improve a potential detection of this linein emission towards one galactic source and another source withnarrow absorption lines. If the detection is confirmed the narrowlines of these sources will enable a search for hyperfine structure whichcan be used to narrow the search for molecular carriers. |
| Publication | |
| Instrument | HIFI_HifiPoint_dbs |
| Temporal Coverage | 2012-04-10T04:12:47Z/2012-04-14T15:54:32Z |
| Version | SPG v14.1.0 |
| 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 | 2012-10-14T15:52:34Z |
| Keywords | Herschel, HSC, submillimetre, far-infrared, HIFI, PACS, SPIRE |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, bergin et al., 2012, 'DDT request to observe the Herschel/HIFI ULine in the Orion Bar and W49', SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-yrili9k |