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https://hdl.handle.net/2440/82889
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dc.contributor.author | Burton, M. | - |
dc.contributor.author | Ashley, M. | - |
dc.contributor.author | Braiding, C. | - |
dc.contributor.author | Storey, J. | - |
dc.contributor.author | Kulesa, C. | - |
dc.contributor.author | Hollenbach, D. | - |
dc.contributor.author | Wolfire, M. | - |
dc.contributor.author | Gluck, C. | - |
dc.contributor.author | Rowell, G. | - |
dc.date.issued | 2014 | - |
dc.identifier.citation | The Astrophysical Journal: an international review of astronomy and astronomical physics, 2014; 782(2):1-8 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.issn | 1538-4357 | - |
dc.identifier.uri | http://hdl.handle.net/2440/82889 | - |
dc.description | Extent: 8 p. | - |
dc.description.abstract | We present spectral line images of [C I] 809 GHz, CO J = 1-0 115 GHz and H I 1.4 GHz line emission, and calculate the corresponding C, CO and H column densities, for a sinuous, quiescent giant molecular cloud about 5 kpc distant along the l = 328° sightline (hereafter G328) in our Galaxy. The [C I] data comes from the High Elevation Antarctic Terahertz telescope, a new facility on the summit of the Antarctic plateau where the precipitable water vapor falls to the lowest values found on the surface of the Earth. The CO and H I data sets come from the Mopra and Parkes/ATCA telescopes, respectively. We identify a filamentary molecular cloud, ~75 × 5 pc long with mass ~4 × 104 M ☉ and a narrow velocity emission range of just 4 km s–1. The morphology and kinematics of this filament are similar in CO, [C I], and H I, though in the latter appears as self-absorption. We calculate line fluxes and column densities for the three emitting species, which are broadly consistent with a photodissociation region model for a GMC exposed to the average interstellar radiation field. The [C/CO] abundance ratio averaged through the filament is found to be approximately unity. The G328 filament is constrained to be cold (T Dust < 20 K) by the lack of far-IR emission, to show no clear signs of star formation, and to only be mildly turbulent from the narrow line width. We suggest that it may represent a GMC shortly after formation, or perhaps still in the process of formation. | - |
dc.description.statementofresponsibility | Michael G. Burton, Michael C. B. Ashley, Catherine Braiding, John W. V. Storey, Craig Kulesa, David J. Hollenbach, Mark Wolfire, Christian Glück and Gavin Rowell | - |
dc.language.iso | en | - |
dc.publisher | Institute of Physics | - |
dc.rights | © 2014.The American Astronomical Society. All rights reserved. | - |
dc.source.uri | http://dx.doi.org/10.1088/0004-637x/782/2/72 | - |
dc.subject | ISM: abundances | - |
dc.subject | ISM: clouds | - |
dc.subject | ISM: molecules | - |
dc.subject | ISM: structure | - |
dc.subject | radio lines: ISM | - |
dc.subject | telescopes | - |
dc.title | The carbon inventory in a quiescent, filamentary molecular cloud in G328 | - |
dc.type | Journal article | - |
dc.contributor.organisation | Institute for Photonics & Advanced Sensing (IPAS) | - |
dc.identifier.doi | 10.1088/0004-637X/782/2/72 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP120101585 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Rowell, G. [0000-0002-9516-1581] | - |
Appears in Collections: | Aurora harvest 4 IPAS publications |
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