Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/23410
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Chen, Y. -J. | en_US |
dc.contributor.author | Juang, K. -J. | en_US |
dc.contributor.author | Nuevo, M. | en_US |
dc.contributor.author | JIMENEZ ESCOBAR, Antonio | en_US |
dc.contributor.author | Muñoz Caro, G. M. | en_US |
dc.contributor.author | Qiu, J. -M. | en_US |
dc.contributor.author | Chu, C. -C. | en_US |
dc.contributor.author | Yih, T. -S. | en_US |
dc.contributor.author | Wu, C. -Y. R. | en_US |
dc.contributor.author | Fung, H. -S. | en_US |
dc.contributor.author | Ip, W. -H. | en_US |
dc.date.accessioned | 2020-03-19T16:51:35Z | - |
dc.date.available | 2020-03-19T16:51:35Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/23410 | - |
dc.description.abstract | Carbonyl sulfide (OCS) is a key molecule in astrobiology that acts as a catalyst in peptide synthesis by coupling amino acids. Experimental studies suggest that hydrogen sulfide (H<SUB>2</SUB>S), a precursor of OCS, could be present in astrophysical environments. In the present study, we used a microwave-discharge hydrogen-flow lamp, simulating the interstellar UV field, and a monochromatic synchrotron light beam to irradiate CO:H<SUB>2</SUB>S and CO<SUB>2</SUB>:H<SUB>2</SUB>S ice mixtures at 14 K with vacuum ultraviolet (VUV) or extreme ultraviolet (EUV) photons in order to study the effect of the photon energy and carbon source on the formation mechanisms and production yields of S-containing products (CS<SUB>2</SUB>, OCS, SO<SUB>2</SUB>, etc.). Results show that (1) the photo-induced OCS production efficiency in CO:H<SUB>2</SUB>S ice mixtures is higher than that of CO<SUB>2</SUB>:H<SUB>2</SUB>S ice mixtures; (2) a lower concentration of H<SUB>2</SUB>S enhances the production efficiency of OCS in both ice mixtures; and (3) the formation pathways of CS<SUB>2</SUB> differ significantly upon VUV and EUV irradiations. Furthermore, CS<SUB>2</SUB> was produced only after VUV photoprocessing of CO:H<SUB>2</SUB>S ices, while the VUV-induced production of SO<SUB>2</SUB> occurred only in CO<SUB>2</SUB>:H<SUB>2</SUB>S ice mixtures. More generally, the production yields of OCS, H<SUB>2</SUB>S<SUB>2</SUB>, and CS<SUB>2</SUB> were studied as a function of the irradiation photon energy. Heavy S-bearing compounds were also observed using mass spectrometry during the warm-up of VUV/EUV-irradiated CO:H<SUB>2</SUB>S ice mixtures. The presence of S-polymers in dust grains may account for the missing sulfur in dense clouds and circumstellar environments. | en_US |
dc.language.iso | eng | en_US |
dc.title | Formation of S-bearing Species by VUV/EUV Irradiation of H<SUB>2</SUB>S-containing Ice Mixtures: Photon Energy and Carbon Source Effects | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1088/0004-637X/798/2/80 | en_US |
dc.identifier.scopus | 2-s2.0-84924265613 | en_US |
dc.identifier.isi | 000350853700015 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.1088/0004-637X/798/2/80 | en_US |
dc.relation.medium | ELETTRONICO | en_US |
dc.relation.volume | 798 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 80 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 11 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | USA | 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 | 2015ApJ...798...80C | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.orcid | 0000-0003-3360-9333 | - |
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