Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27848
DC Field | Value | Language |
---|---|---|
dc.contributor.author | JIMENEZ ESCOBAR, Antonio | en_US |
dc.contributor.author | CIARAVELLA, Angela | en_US |
dc.contributor.author | CECCHI PESTELLINI, Cesare | en_US |
dc.contributor.author | Huang, C.-H. | en_US |
dc.contributor.author | Sie, N.-E. | en_US |
dc.contributor.author | Chen, Y.-J. | en_US |
dc.contributor.author | Muñoz Caro, G. M. | en_US |
dc.date.accessioned | 2020-10-15T14:05:12Z | - |
dc.date.available | 2020-10-15T14:05:12Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27848 | - |
dc.description.abstract | We study the photo-desorption occurring in H2O:CO:NH3 ice mixtures irradiated with monochromatic (550 and 900 eV) and broadband (250-1250 eV) soft X-rays generated at the National Synchrotron Radiation Research Center (Hsinchu, Taiwan). We detect many masses photo-desorbing, from atomic hydrogen (m/z = 1) to complex species with m/z = 69 (e.g., C3H3NO, C4H5O, C4H7N), supporting the enrichment of the gas phase. At low numbers of absorbed photons, substrate-mediated, exciton-promoted desorption dominates the photo-desorption yield, inducing the release of weakly bound (to the surface of the ice) species; as the number of weakly bound species declines, the photo-desorption yield decreases about one order of magnitude, until porosity effects, reducing the surface/volume ratio, produce a further drop of the yield. We derive an upper limit to the CO photo-desorption yield, which in our experiments varies from 1.4 to 0.007 molecules photon-1 in the range 10^15-10^20 absorbed photons cm-2. We apply these findings to a protoplanetary disk model irradiated by a central T Tauri star. | en_US |
dc.language.iso | eng | en_US |
dc.title | X-Ray Photo-desorption of H2O:CO:NH3Circumstellar Ice Analogs: Gas-phase Enrichment | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aae711 | en_US |
dc.identifier.scopus | 2-s2.0-85057164918 | en_US |
dc.identifier.isi | 000450931000008 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/aae711 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 868 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 73 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 7 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | ESP | en_US |
dc.contributor.country | TWN | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018ApJ...868...73J | 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. Palermo | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.orcid | 0000-0003-3360-9333 | - |
crisitem.author.orcid | 0000-0002-3127-8078 | - |
crisitem.author.orcid | 0000-0001-7480-0324 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Jim%C3%A9nez-Escobar_2018_ApJ_868_73.pdf | Pdf editoriale | 963.65 kB | Adobe PDF | View/Open |
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