Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/27460
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | SUHASARIA, TUSHAR | en_US |
dc.contributor.author | BARATTA, Giuseppe | en_US |
dc.contributor.author | Ioppolo, S. | en_US |
dc.contributor.author | Zacharias, H. | en_US |
dc.contributor.author | PALUMBO, Maria Elisabetta | en_US |
dc.date.accessioned | 2020-09-21T16:09:54Z | - |
dc.date.available | 2020-09-21T16:09:54Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27460 | - |
dc.description.abstract | Context. Carbon dioxide (CO<SUB>2</SUB>) is one of the most abundant species detected in icy grain mantles in star forming regions. Laboratory experiments have shown that CO<SUB>2</SUB> molecules are efficiently formed in the solid state under interstellar conditions. Specifically, solid CO<SUB>2</SUB> can be formed through energetic (e.g. UV photolysis, electron and ion bombardment) and non-energetic mechanisms (atom-addition reactions). <BR /> Aims: Here we investigate the role of low-energy cosmic-ray bombardment in the formation of solid CO<SUB>2</SUB> in quiescent dense molecular clouds. <BR /> Methods: We performed laboratory experiments to study the formation of CO<SUB>2</SUB> after ion irradiation with 200 keV H<SUP>+</SUP> of astrophysical relevant ice mixtures. Laboratory spectra are used to fit the profile of the CO<SUB>2</SUB> bending mode band observed at about 15.2 μm (660 cm<SUP>-1</SUP>) by the Spitzer Space Telescope in the line of sight to background sources. <BR /> Results: From a qualitative point of view, good fits to observations are obtained by considering either three or four laboratory components. From a quantitative point of view, a better result is obtained with four components, i.e. when a spectrum of CO<SUB>2</SUB> formed after ion irradiation of CH<SUB>3</SUB>OH ice is added to the fitting procedure. <BR /> Conclusions: Our results support the hypothesis that energetic processing of icy grain mantles is an efficient formation mechanism of CO<SUB>2</SUB> ice also in quiescent dark cloud regions, and indirectly suggest the presence of CH<SUB>3</SUB>OH in icy grain mantles in interstellar cold regions. | en_US |
dc.language.iso | eng | en_US |
dc.title | Solid CO2 in quiescent dense molecular clouds. Comparison between Spitzer and laboratory spectra | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201730504 | en_US |
dc.identifier.scopus | 2-s2.0-85037524436 | en_US |
dc.identifier.isi | 000416942200012 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2017/12/aa30504-17/aa30504-17.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 608 | en_US |
dc.relation.firstpage | A12 | 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 | 2017A&A...608A..12S | 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 | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.orcid | 0000-0002-4755-4719 | - |
crisitem.author.orcid | 0000-0002-3688-160X | - |
crisitem.author.orcid | 0000-0002-9122-491X | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
2017AA.pdf | Pdf editoriale | 1.08 MB | Adobe PDF | Visualizza/apri |
Page view(s)
47
controllato il 25-apr-2024
Download(s)
19
controllato il 25-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.