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dc.contributor.author
Paron, Sergio Ariel
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dc.contributor.author
Ortega, Martin Eduardo
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dc.contributor.author
Fariña, Cecilia
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dc.contributor.author
Cunningham, M.
dc.contributor.author
Jones, P. A.
dc.contributor.author
Rubio, M.
dc.date.available
2017-08-03T20:58:25Z
dc.date.issued
2015-11
dc.identifier.citation
Paron, Sergio Ariel; Ortega, Martin Eduardo; Fariña, Cecilia; Cunningham, M.; Jones, P. A.; et al.; A view of Large Magellanic Cloud H ii regions N159, N132, and N166 through the 345-GHz window; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 455; 1; 11-2015; 518-525
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/21844
dc.description.abstract
We present results obtained towards the H II regions N159, N166, and N132 from the emission of several molecular lines in the 345 GHz window. Using Atacama Submillimetre Telescope Experiment, we mapped a 2.4 arcmin × 2.4 arcmin region towards the molecular cloud N159-W in the 13CO J = 3–2 line and observed several molecular lines at an infrared (IR) peak very close to a massive young stellar object. 12CO and 13CO J = 3–2 were observed towards two positions in N166 and one position in N132. The 13CO J = 3–2 map of the N159-W cloud shows that the molecular peak is shifted south-west compared to the peak of the IR emission. Towards the IR peak, we detected emission from HCN, HNC, HCO+, C2H J = 4–3, CS J = 7–6, and tentatively C18O J = 3–2. This is the first reported detection of these molecular lines in N159-W. The analysis of the C2H line yields more evidence supporting that the chemistry involving this molecular species in compact and/or UC H II regions in the Large Magellanic Cloud should be similar to that in Galactic ones. A non-LTE (local thermodynamic equilibrium) study of the CO emission suggests the presence of both cool and warm gas in the analysed region. The same analysis for the CS, HCO+, HCN, and HNC shows that it is very likely that their emissions arise mainly from warm gas with a density between 5 × 105 to some 106 cm−3. The obtained HCN/HNC abundance ratio greater than 1 is compatible with warm gas and with an star-forming scenario. From the analysis of the molecular lines observed towards N132 and N166, we propose that both regions should have similar physical conditions, with densities of about 103 cm−3.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Oxford University Press
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Hii Regions
dc.subject
Ism: Molecules
dc.subject
Galaxies: Ism
dc.subject
Magellanic Clouds
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
A view of Large Magellanic Cloud H ii regions N159, N132, and N166 through the 345-GHz window
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-27T12:49:00Z
dc.journal.volume
455
dc.journal.number
1
dc.journal.pagination
518-525
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Oxford
dc.description.fil
Fil: Paron, Sergio Ariel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Ortega, Martin Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Fariña, Cecilia. Grupo de Telescopios Isaac Newton; España. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Cunningham, M.. University Of New South Wales; Australia
dc.description.fil
Fil: Jones, P. A.. University Of New South Wales; Australia
dc.description.fil
Fil: Rubio, M.. Universidad de Chile; Chile
dc.journal.title
Monthly Notices of the Royal Astronomical Society
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stv2326
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/455/1/518/985524/A-view-of-Large-Magellanic-Cloud-H-ii-regions-N159
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1510.01246
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