Abstract
view Abstract Citations (70) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Planar H 2O Masers in Star-forming Regions Elitzur, Moshe ; Hollenbach, David J. ; McKee, Christopher F. Abstract The paper examines the planar geometry of shocked material, which is the key property in enabling the high brightness temperatures of H2O masers in star-forming regions. The brightness temperature, beaming angle, and the maser spot size are determined for thin, saturated planar masers under the assumption that the velocity change across the maser due to ordered motions is small compared with the thermal or microturbulent line width. For a given set of physical parameters, the brightness temperature is essentially fully determined by the length of the velocity-coherent region in the shocked plane along the line of sight. Effective aspect ratios (about 5-50) are found that are in agreement with values previously inferred from observed brightness temperatures. Publication: The Astrophysical Journal Pub Date: July 1992 DOI: 10.1086/171574 Bibcode: 1992ApJ...394..221E Keywords: Brightness Temperature; Interstellar Masers; Star Formation; Water Masers; Beams (Radiation); Computational Astrophysics; Physical Properties; Astrophysics; MASERS; STARS: FORMATION full text sources ADS |
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