A dataset provided by the European Space Agency

Name DDT_ebergin_9
Title DDT request to observe the Herschel/HIFI ULine in the Orion Bar and W49


DOI https://doi.org/10.5270/esa-yrili9k
Author European Space Agency
Description One of the key science goals of the HIFI instrument on Herschel has been
the ability to quickly perform unbiased spectral line surveys. The
hoped-for outcome, besides the analysis of known molecules through
multiple lines, has been the detection of previously unknown species. And
indeed, a number of unidentified lines have been found, both in
emission and in absorption. The most spectacular, but also most
puzzling of these is the 617 GHz absorption line feature first found
toward 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 of
SgrvirgulB2, 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 known
carrier for this feature.

We request DDT observing time to improve a potential detection of this line
in emission towards one galactic source and another source with
narrow absorption lines. If the detection is confirmed the narrow
lines of these sources will enable a search for hyperfine structure which
can be used to narrow the search for molecular carriers.
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
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 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