Upper limits for undetected trace species in the stratosphere of Titan.
In this paper we describe the first quantitative search for several molecules in Titan's stratosphere in Cassini CIRS infrared spectra. These are: ammonia (NH3), methanol (CH3OH), formaldehyde (H2CO), and acetonitrile (CH3CN), all of which are predicted by photochemical models but only the last...
| Үндсэн зохиолчид: | , , , , , , , , , , , , , , , , , |
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| Формат: | Conference item |
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2010
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| _version_ | 1826291823959605248 |
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| author | Nixon, C Achterberg, R Teanby, N Irwin, P Flaud, J Kleiner, I Dehayem-Kamadjeu, A Brown, L Sams, R Bézard, B Coustenis, A Ansty, T Mamoutkine, A Vinatier, S Bjoraker, G Jennings, D Romani, P Flasar, F |
| author_facet | Nixon, C Achterberg, R Teanby, N Irwin, P Flaud, J Kleiner, I Dehayem-Kamadjeu, A Brown, L Sams, R Bézard, B Coustenis, A Ansty, T Mamoutkine, A Vinatier, S Bjoraker, G Jennings, D Romani, P Flasar, F |
| author_sort | Nixon, C |
| collection | OXFORD |
| description | In this paper we describe the first quantitative search for several molecules in Titan's stratosphere in Cassini CIRS infrared spectra. These are: ammonia (NH3), methanol (CH3OH), formaldehyde (H2CO), and acetonitrile (CH3CN), all of which are predicted by photochemical models but only the last of which has been observed, and not in the infrared. We find non-detections in all cases, but derive upper limits on the abundances from low-noise observations at 25 degrees S and 75 degrees N. Comparing these constraints to model predictions, we conclude that CIRS is highly unlikely to see NH3 or CH3OH emissions. However, CH3CN and H2CO are closer to CIRS detectability, and we suggest ways in which the sensitivity threshold may be lowered towards this goal. |
| first_indexed | 2024-03-07T03:05:16Z |
| format | Conference item |
| id | oxford-uuid:b24854ed-6701-4778-82c6-1154d9482e0e |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:05:16Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:b24854ed-6701-4778-82c6-1154d9482e0e2022-03-27T04:10:40ZUpper limits for undetected trace species in the stratosphere of Titan.Conference itemhttp://purl.org/coar/resource_type/c_5794uuid:b24854ed-6701-4778-82c6-1154d9482e0eSymplectic Elements at Oxford2010Nixon, CAchterberg, RTeanby, NIrwin, PFlaud, JKleiner, IDehayem-Kamadjeu, ABrown, LSams, RBézard, BCoustenis, AAnsty, TMamoutkine, AVinatier, SBjoraker, GJennings, DRomani, PFlasar, FIn this paper we describe the first quantitative search for several molecules in Titan's stratosphere in Cassini CIRS infrared spectra. These are: ammonia (NH3), methanol (CH3OH), formaldehyde (H2CO), and acetonitrile (CH3CN), all of which are predicted by photochemical models but only the last of which has been observed, and not in the infrared. We find non-detections in all cases, but derive upper limits on the abundances from low-noise observations at 25 degrees S and 75 degrees N. Comparing these constraints to model predictions, we conclude that CIRS is highly unlikely to see NH3 or CH3OH emissions. However, CH3CN and H2CO are closer to CIRS detectability, and we suggest ways in which the sensitivity threshold may be lowered towards this goal. |
| spellingShingle | Nixon, C Achterberg, R Teanby, N Irwin, P Flaud, J Kleiner, I Dehayem-Kamadjeu, A Brown, L Sams, R Bézard, B Coustenis, A Ansty, T Mamoutkine, A Vinatier, S Bjoraker, G Jennings, D Romani, P Flasar, F Upper limits for undetected trace species in the stratosphere of Titan. |
| title | Upper limits for undetected trace species in the stratosphere of Titan. |
| title_full | Upper limits for undetected trace species in the stratosphere of Titan. |
| title_fullStr | Upper limits for undetected trace species in the stratosphere of Titan. |
| title_full_unstemmed | Upper limits for undetected trace species in the stratosphere of Titan. |
| title_short | Upper limits for undetected trace species in the stratosphere of Titan. |
| title_sort | upper limits for undetected trace species in the stratosphere of titan |
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