Observations of 5 micron lines of shocked CO and H2 in the Orion molecular cloud

Abstract

view Abstract Citations (18) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Observations of 5 Micron Lines of Shocked CO and H 2 in the Orion Molecular Cloud Geballe, T. R. ; Garden, R. P. Abstract Velocity-resolved spectra of the 4.74-micron 1-0 P(8) line of CO and the 4.69-micron 0-0 S(9) line of H2 have been measured at Peak 1 and Peak 2 in the shocked-gas region of the Orion molecular cloud. A map of the CO P(8) line emission in the vicinity of Peak 1 has also been made. The velocity profiles of the CO and H2 lines are similar to one another at each location and roughly resemble those of shorter wavelength lines, such as the 1-0 S(1) line of H2. However, at Peak 1 the S(9) line is noticeably broader than the 1-0 S(1) line. This result is consistent with increased extinction to interior, higher velocity outflowing gas. The map of CO line intensity shows a ridge of peak intensity roughly midway between Peak 1 and BN, and does not closely resemble maps of H2 emission lines. Possible interpretations of this difference are discussed. Publication: The Astrophysical Journal Pub Date: December 1990 DOI: 10.1086/169513 Bibcode: 1990ApJ...365..602G Keywords: Carbon Monoxide; Gas Flow; Hydrogen; Interstellar Matter; Molecular Clouds; Orion Nebula; Shock Waves; Emission Spectra; Line Spectra; Astrophysics; INFRARED: SPECTRA; INTERSTELLAR: MOLECULES; NEBULAE: INTERNAL MOTIONS; NEBULAE: ORION NEBULA; SHOCK WAVES full text sources ADS | data products SIMBAD (2)