The ISO-SWS 2.4-45.2 Micron Spectrum Toward Orion IR c2

Details The ISO-SWS 2.4-45.2 Micron Spectrum Toward Orion IR c2 The ISO-SWS 2.4-45.2 Micron Spectrum Toward Orion IR c2

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...502l.173v&link_type=abstract

Astrophysical Journal Letters v.502, p.L173

Astronomy and Astrophysics

Astronomy

47

Ism: Abundances, Ism: Molecules, Ism: Individual Name: Orion Irc2, Infrared: Ism: Lines And Bands, Molecular Processes

Scientific paper

The complete infrared spectrum from 2.4 to 45.2 mu m toward the prototypical massive star-forming region Orion IRc2 is presented, obtained with the Short Wavelength Spectrometer (SWS) on board the Infrared Space Observatory (ISO) at a resolving power lambda / Delta lambda ~1300-2500 . A wealth of emission and absorption features is found, including H2 vibration-rotation lines, the full set of H2 pure rotational lines (0,0) S(1)-S(17), H recombination lines, ionic fine-structure lines, PAH emission features, and absorption and emission bands by interstellar ices and gas-phase molecules, including CO2, CH4, and SO2. Particularly interesting is the detection of strong emission and absorption lines in the H2O nu 2 bending mode at 6.2 mu m and the observation of highly excited pure rotational lines of H2O in absorption at 25-45 mu m. The origin of these lines in each of the physical components included in the ISO-SWS beam (H II region, PDR, quiescent ridge, shocked low-velocity plateau) is briefly discussed.

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