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

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169513· OSTI ID:5993808

Geballe, T R; Garden, R P ^[1]

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1. Joint Astronomy Center, Hilo, HI (USA) California Univ., Irvine (USA)

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. 12 refs.

• OSTI ID: 5993808
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 365; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC GASES
ELEMENTS
EMISSION SPECTRA
FLUID FLOW
FLUIDS
GAS FLOW
GASES
HYDROGEN
INTERSTELLAR SPACE
MAPS
MOLECULES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
SHOCK WAVES
SPACE
SPECTRA
VELOCITY