Radiative transfer effects in H2O masers

Details Radiative transfer effects in H2O masers Radiative transfer effects in H2O masers

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...140..295c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 140, no. 2, Nov. 1984, p. 295-302. Research supported by the Deutsche Forschun

Statistics

Computation

12

Astronomical Models, Infrared Astronomy, Interstellar Masers, Interstellar Matter, Radiative Transfer, Water Masers, Collision Rates, Computational Astrophysics, Cosmic Dust, Infrared Absorption, Molecular Collisions, Molecular Excitation

Scientific paper

The influence of different physical effects on the efficiency of H2O-masers has been studied by solving numerically the coupled set of statistical and radiative transfer equations in an on-the-spot-approximation. A physical model was used in which the excitation is basically due to collisions. The physical parameters have been varied over a wide range and two different collisional laws have been employed. The results indicate that the combined influence of resonant collisions and the absorption of IR-photons by cold dust can lead to luminosities in the 1.35 cm-line comparable to those observed.

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