AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores
Forty molecular cloud cores in the southern hemisphere from the initial Spitzer Space Telescope Cores-to-Disks (c2d) Legacy program source list have been surveyed in 13CO(2-1), 12CO(4-3), and 12CO(7-6) with the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO). The cores, ten of whic...
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ftdatacite:10.48550/arxiv.astro-ph/0703096 2023-05-15T14:04:39+02:00 AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores Loehr, A. Bourke, T. L. Lane, A. P. Myers, P. C. Parshley, S. C. Stark, A. A. Tothill, N. F. H. 2007 https://dx.doi.org/10.48550/arxiv.astro-ph/0703096 https://arxiv.org/abs/astro-ph/0703096 unknown arXiv https://dx.doi.org/10.1086/517608 Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Astrophysics astro-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2007 ftdatacite https://doi.org/10.48550/arxiv.astro-ph/0703096 https://doi.org/10.1086/517608 2022-04-01T15:40:29Z Forty molecular cloud cores in the southern hemisphere from the initial Spitzer Space Telescope Cores-to-Disks (c2d) Legacy program source list have been surveyed in 13CO(2-1), 12CO(4-3), and 12CO(7-6) with the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO). The cores, ten of which contain embedded sources, are located mostly in the Vela, Ophiuchus, Lupus, Chamaeleon, Musca, and Scorpius complexes. 12CO(7-6) emission was undetected in all 40 clouds. We present data of 40 sources in 13CO(2-1) and 12CO(4-3), significant upper limits of 12CO(7-6), as well as a statistical analysis of the observed properties of the clouds. We find the typical 13CO(2-1) linewidth to be 2.0 km/s for cores with embedded stars, and 1.8 km/s for all others. The typical 12CO(4-3) linewidth is 2.6 to 3.7 km/s for cores with known embedded sources, and 1.6 to 2.3 km/s for all others. The average 13CO column density derived from the line intensities was found to be 1.9 x 10^15 cm^(-2) for cores with embedded stars, and 1.5 x 10^15 cm^(-2) for all others. The average kinetic temperature in the molecular cores, determined through a Large Velocity Gradient analysis of a set of nine cores, has an average lower limit of 16 K and an average upper limit of 26 K. The average molecular hydrogen density has an average lower limit of 10^2.9 cm^(-3) and an average upper limit of 10^3.3 cm^(-3) for all cores. For a different subset of nine cores, we have derived masses. They range from 4 to 255 M_sun. Overall, our c2d sample of southern molecular cores has a range of properties (linewidth, column density, size, mass, embedded stars) similar to those of past studies. : 23 pages, 13 figures Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic |
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Astrophysics astro-ph FOS Physical sciences |
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Astrophysics astro-ph FOS Physical sciences Loehr, A. Bourke, T. L. Lane, A. P. Myers, P. C. Parshley, S. C. Stark, A. A. Tothill, N. F. H. AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores |
topic_facet |
Astrophysics astro-ph FOS Physical sciences |
description |
Forty molecular cloud cores in the southern hemisphere from the initial Spitzer Space Telescope Cores-to-Disks (c2d) Legacy program source list have been surveyed in 13CO(2-1), 12CO(4-3), and 12CO(7-6) with the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO). The cores, ten of which contain embedded sources, are located mostly in the Vela, Ophiuchus, Lupus, Chamaeleon, Musca, and Scorpius complexes. 12CO(7-6) emission was undetected in all 40 clouds. We present data of 40 sources in 13CO(2-1) and 12CO(4-3), significant upper limits of 12CO(7-6), as well as a statistical analysis of the observed properties of the clouds. We find the typical 13CO(2-1) linewidth to be 2.0 km/s for cores with embedded stars, and 1.8 km/s for all others. The typical 12CO(4-3) linewidth is 2.6 to 3.7 km/s for cores with known embedded sources, and 1.6 to 2.3 km/s for all others. The average 13CO column density derived from the line intensities was found to be 1.9 x 10^15 cm^(-2) for cores with embedded stars, and 1.5 x 10^15 cm^(-2) for all others. The average kinetic temperature in the molecular cores, determined through a Large Velocity Gradient analysis of a set of nine cores, has an average lower limit of 16 K and an average upper limit of 26 K. The average molecular hydrogen density has an average lower limit of 10^2.9 cm^(-3) and an average upper limit of 10^3.3 cm^(-3) for all cores. For a different subset of nine cores, we have derived masses. They range from 4 to 255 M_sun. Overall, our c2d sample of southern molecular cores has a range of properties (linewidth, column density, size, mass, embedded stars) similar to those of past studies. : 23 pages, 13 figures |
format |
Text |
author |
Loehr, A. Bourke, T. L. Lane, A. P. Myers, P. C. Parshley, S. C. Stark, A. A. Tothill, N. F. H. |
author_facet |
Loehr, A. Bourke, T. L. Lane, A. P. Myers, P. C. Parshley, S. C. Stark, A. A. Tothill, N. F. H. |
author_sort |
Loehr, A. |
title |
AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores |
title_short |
AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores |
title_full |
AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores |
title_fullStr |
AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores |
title_full_unstemmed |
AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores |
title_sort |
ast/ro 13co(j=2-1) and 12co(j=4-3) mapping of southern spitzer c2d small clouds and cores |
publisher |
arXiv |
publishDate |
2007 |
url |
https://dx.doi.org/10.48550/arxiv.astro-ph/0703096 https://arxiv.org/abs/astro-ph/0703096 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://dx.doi.org/10.1086/517608 |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.astro-ph/0703096 https://doi.org/10.1086/517608 |
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1766275870830362624 |