THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328
We present spectral line images of [CI] 809 GHz, CO J = 1-0 115 GHz and Hi 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 degrees sightline (hereafter G328) in our Galaxy. The [...
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ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:44575 2023-05-15T13:54:56+02:00 THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328 Burton, Michael G. Ashley, Michael C. B. Braiding, Catherine Storey, John W. V. Kulesa, Craig Hollenbach, David J. Wolfire, Mark Glueck, Christian Rowell, Gavin 2014 https://kups.ub.uni-koeln.de/44575/ eng eng IOP PUBLISHING LTD Burton, Michael G., Ashley, Michael C. B., Braiding, Catherine orcid:0000-0002-6475-0797 , Storey, John W. V., Kulesa, Craig, Hollenbach, David J., Wolfire, Mark, Glueck, Christian and Rowell, Gavin orcid:0000-0002-9516-1581 (2014). THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328. Astrophys. J., 782 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357 ddc:no doc-type:article publishedVersion 2014 ftubkoeln 2022-11-09T07:28:45Z We present spectral line images of [CI] 809 GHz, CO J = 1-0 115 GHz and Hi 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 degrees sightline (hereafter G328) in our Galaxy. The [CI] 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 Hi data sets come from the Mopra and Parkes/ATCA telescopes, respectively. We identify a filamentary molecular cloud, similar to 75 x 5 pc long with mass similar to 4 x 10(4) M-circle dot and a narrow velocity emission range of just 4 km s(-1). The morphology and kinematics of this filament are similar in CO, [CI], and Hi, 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. Article in Journal/Newspaper Antarc* Antarctic Cologne University: KUPS Antarctic The Antarctic |
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Cologne University: KUPS |
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ftubkoeln |
language |
English |
topic |
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ddc:no Burton, Michael G. Ashley, Michael C. B. Braiding, Catherine Storey, John W. V. Kulesa, Craig Hollenbach, David J. Wolfire, Mark Glueck, Christian Rowell, Gavin THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328 |
topic_facet |
ddc:no |
description |
We present spectral line images of [CI] 809 GHz, CO J = 1-0 115 GHz and Hi 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 degrees sightline (hereafter G328) in our Galaxy. The [CI] 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 Hi data sets come from the Mopra and Parkes/ATCA telescopes, respectively. We identify a filamentary molecular cloud, similar to 75 x 5 pc long with mass similar to 4 x 10(4) M-circle dot and a narrow velocity emission range of just 4 km s(-1). The morphology and kinematics of this filament are similar in CO, [CI], and Hi, 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. |
format |
Article in Journal/Newspaper |
author |
Burton, Michael G. Ashley, Michael C. B. Braiding, Catherine Storey, John W. V. Kulesa, Craig Hollenbach, David J. Wolfire, Mark Glueck, Christian Rowell, Gavin |
author_facet |
Burton, Michael G. Ashley, Michael C. B. Braiding, Catherine Storey, John W. V. Kulesa, Craig Hollenbach, David J. Wolfire, Mark Glueck, Christian Rowell, Gavin |
author_sort |
Burton, Michael G. |
title |
THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328 |
title_short |
THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328 |
title_full |
THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328 |
title_fullStr |
THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328 |
title_full_unstemmed |
THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328 |
title_sort |
carbon inventory in a quiescent, filamentary molecular cloud in g328 |
publisher |
IOP PUBLISHING LTD |
publishDate |
2014 |
url |
https://kups.ub.uni-koeln.de/44575/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Burton, Michael G., Ashley, Michael C. B., Braiding, Catherine orcid:0000-0002-6475-0797 , Storey, John W. V., Kulesa, Craig, Hollenbach, David J., Wolfire, Mark, Glueck, Christian and Rowell, Gavin orcid:0000-0002-9516-1581 (2014). THE CARBON INVENTORY IN A QUIESCENT, FILAMENTARY MOLECULAR CLOUD IN G328. Astrophys. J., 782 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357 |
_version_ |
1766261131236605952 |