Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27820
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kahane, Claudine | en_US |
dc.contributor.author | Jaber Al-Edhari, Ali | en_US |
dc.contributor.author | Ceccarelli, Cecilia | en_US |
dc.contributor.author | López-Sepulcre, Ana | en_US |
dc.contributor.author | FONTANI, FRANCESCO | en_US |
dc.contributor.author | Kama, Mihkel | en_US |
dc.date.accessioned | 2020-10-14T14:59:52Z | - |
dc.date.available | 2020-10-14T14:59:52Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27820 | - |
dc.description.abstract | We present a complete census of the <SUP>14</SUP>N/<SUP>15</SUP>N isotopic ratio in the most abundant N-bearing molecules toward the cold envelope of the protocluster OMC-2 FIR4, the best known Sun progenitor. To this scope, we analyzed the unbiased spectral survey obtained with the IRAM 30 m telescope at 3, 2, and 1 mm. We detected several lines of CN, HCN, HNC, HC<SUB>3</SUB>N, N<SUB>2</SUB>H<SUP>+</SUP>, and their respective <SUP>13</SUP>C and <SUP>15</SUP>N isotopologues. The lines’ relative fluxes are compatible with LTE conditions, and moderate line opacities have been corrected via a population diagram method or theoretical relative intensity ratios of the hyperfine structures. The five species lead to very similar <SUP>14</SUP>N/<SUP>15</SUP>N isotopic ratios, without any systematic difference between amine- and nitrile-bearing species as previously found in other protostellar sources. The weighted average of the <SUP>14</SUP>N/<SUP>15</SUP>N isotopic ratio is 270 ± 30. This <SUP>14</SUP>N/<SUP>15</SUP>N value is remarkably consistent with the [250-350] range measured for the local galactic ratio but significantly differs from the ratio measured in comets (around 140). High-angular resolution observations are needed to examine whether this discrepancy is maintained at smaller scales. In addition, using the CN, HCN, and HC<SUB>3</SUB>N lines, we derived a <SUP>12</SUP>C/<SUP>13</SUP>C isotopic ratio of 50 ± 5. | en_US |
dc.language.iso | eng | en_US |
dc.title | First Measurement of the 14N/15N Ratio in the Analog of the Sun Progenitor OMC-2 FIR4 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aa9e88 | en_US |
dc.identifier.scopus | 2-s2.0-85040660385 | en_US |
dc.identifier.isi | 000422820400012 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/aa9e88 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 852 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 130 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 6 | en_US |
dc.description.international | sì | 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...852..130K | 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 | 0000-0003-0348-3418 | - |
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 | |
---|---|---|---|---|
Kahane_2018_ApJ_852_130.pdf | Pdf editoriale | 2.39 MB | Adobe PDF | View/Open |
1712.01564.pdf | postprint | 862.4 kB | Adobe PDF | View/Open |
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