Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/32416
DC Field | Value | Language |
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dc.contributor.author | Ospina-Zamudio, J. | en_US |
dc.contributor.author | Favre, C. | en_US |
dc.contributor.author | Kounkel, M. | en_US |
dc.contributor.author | Xu, L. -H. | en_US |
dc.contributor.author | Neill, J. | en_US |
dc.contributor.author | Lefloch, B. | en_US |
dc.contributor.author | Faure, A. | en_US |
dc.contributor.author | Bergin, E. | en_US |
dc.contributor.author | FEDELE , DAVIDE | en_US |
dc.contributor.author | Hartmann, L. | en_US |
dc.date.accessioned | 2022-06-20T10:46:54Z | - |
dc.date.available | 2022-06-20T10:46:54Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32416 | - |
dc.description.abstract | We investigate the deuteration of methanol towards the high-mass star-forming region NGC 7538-IRS1. We carried out a multi-transition study of CH<SUB>3</SUB>OH, <SUP>13</SUP>CH<SUB>3</SUB>OH, and the deuterated flavors, CH<SUB>2</SUB>DOH and CH<SUB>3</SUB>OD, between 1.0 and 1.4 mm with the IRAM-30 m antenna. In total, 34 <SUP>13</SUP>CH<SUB>3</SUB>OH, 13 CH<SUB>2</SUB>DOH lines and 20 CH<SUB>3</SUB>OD lines spanning a wide range of upper-state energies (E<SUB>up</SUB>) were detected. From the detected transitions, we estimate that the measured D/H does not exceed 1%, with a measured CH<SUB>2</SUB>DOH/CH<SUB>3</SUB>OH and CH<SUB>3</SUB>OD/CH<SUB>3</SUB>OH of about (32 ± 8) × 10<SUP>-4</SUP> and (10 ± 4) × 10<SUP>-4</SUP>, respectively. This finding is consistent with the hypothesis of a short-timescale formation during the pre-stellar phase. We find a relative abundance CH<SUB>2</SUB>DOH/CH<SUB>3</SUB>OD ratio of 3.2 ± 1.5. This result is consistent with a statistical deuteration. We cannot exclude H/D exchanges between water and methanol if water deuteration is of the order 0.1%, as suggested by recent Herschel observations. <P />This paper is dedicated to the memory of our dear colleague, Dr. Li-Hong Xu, who recently passed away. | en_US |
dc.language.iso | eng | en_US |
dc.title | Deuterated methanol toward NGC 7538-IRS1 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201834948 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2019/07/aa34948-18/aa34948-18.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 627 | en_US |
dc.relation.firstpage | A80 | en_US |
dc.type.referee | REF_1 | 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 | 2019A&A...627A..80O | 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. Arcetri | - |
crisitem.author.orcid | 0000-0001-6156-0034 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
ospina_2019_postprint.pdf | postprint | 959.09 kB | Adobe PDF | View/Open |
Ospina_2019_editorial.pdf | Pdf editoriale | 1.12 MB | Adobe PDF | View/Open |
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