| タイトル | Observations of far-infrared line profiles in the Orion-KL region |
| 著者（英） | Melnick, G.; Fitelson, W.; Lugten, J. B.; Genzel, R.; Crawford, M. K. |
| 著者所属（英） | California Univ.|Harvard-Smithsonian Center for Astrophysics |
| 発行日 | 1986-04-15 |
| 言語 | eng |
| 内容記述 | Measurements of several far-infrared emission line profiles in the Orion-KL region are reported. The emission from the CO, OH, and forbidden O I emission lines toward the BN-KL and H2 peak 1 positions probably comes from dense, hot molecular gas in the Orion-KL shock. The CO and forbidden O I lines have similar profiles, suggesting that the high-velocity forbidden O I emission also arises in magnetohydrodynamic 'cloud' shocks. The velocity centroids of the lines are somewhat blueshifted. The far-infrared data thus support the interpretation that the blue asymmetry of the H2 2 micron lines is not mainly due to differential dust extinction, but rather to the kinematics and geometry of the shocked gas in the Orion-KL outflow. The forbidden O I and CO lines, however, have significantly less extreme blueshifted emission than the H2 lines. Both the forbidden O I 63 micron and forbidden C II 158 micron lines have features strongly supporting a common origin near the surface of the Orion molecular cloud. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 86A35797 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/384867 |
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