Abstract
view Abstract Citations (43) References (47) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Atomic Hydrogen in the Orion Star-Forming Region Chromey, Frederick R. ; Elmegreen, Bruce G. ; Elmegreen, Debra Meloy Abstract A large-scale survey of atomic hydrogen in Orion reveals low-density material with a total mass comparable to that in dense molecular clouds. The atomic gas is sufficiently dense that it can shield the molecular material from photodissociative radiation and provide a pressure link to the low-density intercloud medium. An excess of H I emission comes from photodissociation fronts near the bright stars and from a giant shell in the Orion Belt region. This shell may have caused the apparent bifurcation between the Orion A and B clouds, and the associated pressures may have induced peculiar motions and star formation in NGC 2023 and 2024. Publication: The Astronomical Journal Pub Date: December 1989 DOI: 10.1086/115289 Bibcode: 1989AJ.....98.2203C Keywords: Hydrogen Atoms; Molecular Clouds; Orion Nebula; Star Formation; Electron Transitions; Emission Spectra; Photodissociation; Stellar Luminosity; Astrophysics; NEBULAE: ORION NEBULA full text sources ADS | data products SIMBAD (9)
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