Radiative Instabilities in Three-dimensional Astrophysical Masers | Zendy

Gerardo A. Scappaticci | Zendy; W. D. Watson | Zendy

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Radiative Instabilities in Three-dimensional Astrophysical Masers

Author(s) -

Gerardo A. Scappaticci,

W. D. Watson

Publication year - 1995

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/176014

Subject(s) - physics , radiative transfer , maser , astrophysics , atmospheric radiative transfer codes , radiative flux , flux (metallurgy) , astronomy , quantum mechanics , materials science , metallurgy

Inherent instabilities in the radiative transfer for astrophysical masers have been recognized and calculated in the linear maser idealization in our previous investigations. The same instabilities are now shown to occur in the more realistic, three-dimensional geometries. Fluctuations in the emergent flux result and may be related to the observed fluctuations in the radiative flux from the 1665 MHz OH masers that have been reported to occur on timescales as short as 1000 s. The time-dependent differential equations of radiative transfer are solved numerically for three-dimensional astrophysical masers. Computations are performed for spherical and elongated (rectangular parallelepiped) geometries.

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