| タイトル | Far-infrared spectroscopy of galaxies - The 158 micron C(+) line and the energy balance of molecular clouds |
| 著者（英） | Genzel, R.; Townes, C. H.; Crawford, M. K.; Watson, D. M. |
| 著者所属（英） | California Inst. of Tech.|California Univ. |
| 発行日 | 1985-04-15 |
| 言語 | eng |
| 内容記述 | Observations of the 158 microns fine-structure line of C(+) toward the nuclei of six gas-rich galaxies are presented. The observations are compared with observations of the CO J = 1-0 and H I 21 cm lines, observations of far-IR continuum emission, and observations of forbidden C II emission with the Galaxy. The forbidden C II line comes from dense, warm gas in UV-illuminated photodissociation regions at the surfaces of molecular clouds. This line is probably optically thin in all but the brightest of galactic sources. The variation of forbidden C II brightness from source to source and its ratio to the integrated infrared continuum intensity agree well with the theoretical prediction that UV absorption by dust controls the C(+) column density. The forbidden C II line is a tracer of molecular clouds, especially those near intense sources of UV radiation. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 85A34635 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/391435 |
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