a st ro - p h / 02 01 49 6 v 1 3 0 Ja n 20 02 Molecular Hydrogen in the Lagoon : H 2 line emission from Messier 8
نویسنده
چکیده
The 2.12μm 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 cm arcsec. The line centre emission velocity varies from −25 km s in the SE lobe to +45km s 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 M⊙ (without any correction for extinction).
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