Publications of the Astronomical Society of Australia | |
Molecular Hydrogen in the Lagoon: H2 Line Emission from Messier 8 | |
Michael G. Burton1  | |
关键词: infrared: ISM; Hii regions; ISM: individual (M8); ISM: molecules; molecular processes; shock waves; stars: formation; | |
DOI : 10.1071/AS02001 | |
学科分类:天文学(综合) | |
来源: CSIRO | |
【 摘 要 】
The 2.12 μm v = 1−0 S(1) line of molecular hydrogen has been imaged in the Hourglass region of M8. The line is emitted from a roughly bipolar region, centred around the O7 star Herschel 36. The peak H2 1−0 S(1) line intensity is 8.2 × 10−15 erg s−1 cm−2arcsec−2. The line centre emission velocity varies from −25 kms−1 in the SE lobe to +45 kms−1 in the NW lobe. The distribution is similar to that of the CO J = 3−2 line. The H2 line appears to be shock-excited when a bipolar outflow from Herschel 36 interacts with the ambient molecular cloud. The total luminosity of all H2 lines is estimated to be ˜16 L⊙ and the mass of the hot molecular gas ˜9 × 10−4 M⊙ (without any correction for extinction).
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912040531734ZK.pdf | 204KB | download |