Master time variations

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Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226l..21b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 226, Nov. 15, 1978, p. L21-L24. NSF-supported research.

Astronomy and Astrophysics

Astronomy

23

Interstellar Masers, Nebulae, Radio Astronomy, Water Masers, Astronomical Models, Cosmic Dust, Molecular Collisions, Opacity, Time Response

Scientific paper

The physical implications of a rapidly time-varying H20 maser source in W3(OH) are discussed, using collisional and radiation pump models. All the simple models require a large injection of energy (approximately 10 to the 39th power to 10 to the 41st power ergs) into a cloud of dimension of the order of 10 to the 14th power to 10 to the 15th power cm in a time of the order of a few days. The models also require higher opacities for the gas than are commonly assumed, which suggests that, in addition to the dust component, there is also a rich mixture of molecules in the gas.

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