Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/27906
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Aoki, S. | en_US |
dc.contributor.author | Richter, M. J. | en_US |
dc.contributor.author | DeWitt, C. | en_US |
dc.contributor.author | Boogert, A. | en_US |
dc.contributor.author | Encrenaz, T. | en_US |
dc.contributor.author | Sagawa, H. | en_US |
dc.contributor.author | Nakagawa, H. | en_US |
dc.contributor.author | Vandaele, A. C. | en_US |
dc.contributor.author | GIURANNA, MARCO | en_US |
dc.contributor.author | Greathouse, T. K. | en_US |
dc.contributor.author | Fouchet, T. | en_US |
dc.contributor.author | Geminale, A. | en_US |
dc.contributor.author | Sindoni, G. | en_US |
dc.contributor.author | McKelvey, M. | en_US |
dc.contributor.author | Case, M. | en_US |
dc.contributor.author | Kasaba, Y. | en_US |
dc.date.accessioned | 2020-10-21T13:38:14Z | - |
dc.date.available | 2020-10-21T13:38:14Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27906 | - |
dc.description.abstract | Discovery of CH<SUB>4</SUB> in the Martian atmosphere has led to much discussion since it could be a signature of biological and/or geological activities on Mars. However, the presence of CH<SUB>4</SUB> and its temporal and spatial variations are still under discussion because of the large uncertainties embedded in the previous observations. We performed sensitive measurements of Martian CH<SUB>4</SUB> by using the Echelon-Cross-Echelle Spectrograph (EXES) onboard the Stratospheric Observatory for Infrared Astronomy (SOFIA) on 16 March 2016, which corresponds to summer (Ls = 123.2<SUP>∘</SUP>) in the northern hemisphere on Mars. The high altitude of SOFIA ( 13.7 km) enables us to significantly reduce the effects of terrestrial atmosphere. Thanks to this, SOFIA/EXES improves our chances of detecting Martian CH<SUB>4</SUB> lines because it reduces the impact of telluric CH<SUB>4</SUB> on Martian CH<SUB>4</SUB>, and allows us to use CH<SUB>4</SUB> lines in the 7.5 μm band which has less contamination. However, our results show no unambiguous detection of Martian CH<SUB>4</SUB>. The Martian disk was spatially resolved into 3 × 3 areas, and the upper limits on the CH<SUB>4</SUB> volume mixing ratio range from 1 to 9 ppb across the Martian atmosphere, which is significantly less than detections in several other studies. These results emphasize that release of CH<SUB>4</SUB> on Mars is sporadic and/or localized if the process is present. | en_US |
dc.language.iso | eng | en_US |
dc.title | Stringent upper limit of CH4 on Mars based on SOFIA/EXES observations | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201730903 | en_US |
dc.identifier.scopus | 2-s2.0-85043516498 | en_US |
dc.identifier.isi | 000427143100002 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2018/02/aa30903-17/aa30903-17.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 610 | en_US |
dc.relation.firstpage | A78 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018A&A...610A..78A | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.orcid | 0000-0001-8967-9184 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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File | Descrizione | Dimensioni | Formato | |
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Manuscript_final_sibmitted.pdf | preprint | 5.69 MB | Adobe PDF | Visualizza/apri |
aa30903-17.pdf | Pdf editoriale | 3.22 MB | Adobe PDF | Visualizza/apri |
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