Collisional pumping of H2O masers in star-forming regions

Details Collisional pumping of H2O masers in star-forming regions Collisional pumping of H2O masers in star-forming regions

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373..525k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 373, June 1, 1991, p. 525-534. Research supported by American Astronomical

Other

25

Interstellar Matter, Lasing, Radiative Transfer, Star Formation, Water Masers, Aspect Ratio, Cylinders, Hydrogen, Photons, Submillimeter Waves

Scientific paper

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 gradients along the axis of the cylinder are assumed. In addition to the 22 GHz water maser, results are presented for other maser transitions of water in the submillimeter range. The detection of these masers with submillimeter telescopes could significantly enhance the understanding of the physical conditions in star-forming regions.

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