A self-consistent model for 22 GHz water maser in dusty medium: Orion KL nebula and AGN NGC 4258

Details A self-consistent model for 22 GHz water maser in dusty medium: Orion KL nebula and AGN NGC 4258 A self-consistent model for 22 GHz water maser in dusty medium: Orion KL nebula and AGN NGC 4258

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..341b&link_type=abstract

In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A

Other

Masers, Dust, Star Formation Regions, Agn

Scientific paper

We propose a model of the H2O maser, based on to the presence of dust grains of various types. Since different grains have different properties, they can have different temperatures. Therefore, the dust grains of one type are cooling the gas, while grains of another type are heating it and the gas temperature takes an intermediate value. We consider a case of optically thin dust, assuming that the dust temperature is determined by the radiation from a central object, while the temperature of the gas depends on interaction with dust grains and radiative cooling by H2O molecules. We apply our model to the exceptional maser burst in Orion KL nebula and maser disk in active galactic nucleus NGC 4258.

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