Collisional pumping of H2O masers in star-forming regions

The pumping of H2O masers in star-forming regions by collisions with H2 molecules has been studied. It is found that the strong water masers in star-forming regions may not be explained by collisional pumping, unless very large aspect ratios (length/diameter) for the cylinder or small velocity gradi...

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Veröffentlicht in:	The Astrophysical journal 1991-06, Vol.373 (2), p.525-534
Hauptverfasser:	KYLAFIS, N. D, NORMAN, C. A
Format:	Artikel
Sprache:	eng
Schlagworte:	640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources AMPLIFIERS ASPECT RATIO Astronomy BOSONS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS CYLINDERS DETECTION Earth, ocean, space ELECTROMAGNETIC RADIATION ELECTRONIC EQUIPMENT ELEMENTARY PARTICLES ELEMENTS Exact sciences and technology HYDROGEN HYDROGEN COMPOUNDS INFRARED RADIATION Interstellar medium (ism) and nebulae in milky way INTERSTELLAR SPACE MASERS MASSLESS PARTICLES MICROWAVE AMPLIFIERS MICROWAVE EQUIPMENT Molecular clouds, h2 clouds, dense clouds, and dark clouds MOLECULES NONMETALS OXYGEN COMPOUNDS PHOTONS PUMPING RADIATION TRANSPORT RADIATIONS SPACE Stellar systems. Galactic and extragalactic objects and systems. The universe WATER
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