A dataset provided by the European Space Agency

Name OT2_mgerin_6
Title Search for CH2 D+, a key reactant in interstellar chemistry
URL

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DOI 10.5270/esa-lj5jsjt
Author gerin, m.
Description We propose to perform a deep search for the CH2D+ ion with Herschel-HIFI. This species plays a key role in interstellar chemistry, especially for deuterium fractionation at moderate temperature, but also as tracer of the symmetrical species CH3+. Because of its low dipole moment, and floppy character, its rotational transitions were not accurately known until recently (Amano 2010). Also, only two millimeter transition and one submillimeter transition are available from the ground, but in spectral regions where multiple emission lines from other species are present. Therefore, this ion escaped detection despite extensive searches by some of the proponents for over 30 years. Three of the most intense lines of CH2D+ are accessible to Herschel-HIFI in relatively clean spectral regions. The detection of CH2D+ seems therefore to be finally within reach, providing a key proof of the validity of state of the art chemical networks.
Publication
Instrument HIFI_HifiPoint_dbs
Temporal Coverage 2012-09-04T17:12:53Z/2012-09-08T09:31:52Z
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 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2013-03-08T09:05:06Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-03-08T09:05:06Z, OT2_mgerin_6, SPG v14.1.0. https://doi.org/10.5270/esa-lj5jsjt