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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ftcern:oai:cds.cern.ch:1021710 2023-05-15T13:58:28+02:00 AST/RO 13CO(J=2-1) and 12CO(J=4-3) Mapping of Southern Spitzer c2d Small Clouds and Cores Löhr, A Bourke, T L Lane, A P Myers, P C Parshley, S C Stark, A A Tothill, N F H 2007-03-05 http://cds.cern.ch/record/1021710 eng eng http://cds.cern.ch/record/1021710 astro-ph/0703096 oai:cds.cern.ch:1021710 Astrophysics and Astronomy 2007 ftcern 2018-07-28T08:48:23Z 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. Other/Unknown Material Antarc* Antarctic CERN Document Server (CDS) Antarctic The Antarctic |
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Astrophysics and Astronomy |
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Astrophysics and Astronomy Löhr, 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 |
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Astrophysics and Astronomy |
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. |
author |
Löhr, A Bourke, T L Lane, A P Myers, P C Parshley, S C Stark, A A Tothill, N F H |
author_facet |
Löhr, A Bourke, T L Lane, A P Myers, P C Parshley, S C Stark, A A Tothill, N F H |
author_sort |
Löhr, 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 |
publishDate |
2007 |
url |
http://cds.cern.ch/record/1021710 |
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Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://cds.cern.ch/record/1021710 astro-ph/0703096 oai:cds.cern.ch:1021710 |
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1766266792502624256 |