Linearly polarized radiation from astrophysical masers due to magnetic fields of intermediate strength

Details Linearly polarized radiation from astrophysical masers due to magnetic fields of intermediate strength Linearly polarized radiation from astrophysical masers due to magnetic fields of intermediate strength

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...354..660n&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 354, May 10, 1990, p. 660-675.

Other

33

Interstellar Magnetic Fields, Interstellar Masers, Linear Polarization, Magnetic Effects, Polarized Radiation, Giant Stars, Interstellar Gas, Spectrum Analysis, Stellar Evolution, Zeeman Effect

Scientific paper

Previous solutions for polarization of astrophysical maser radiation due to closed-shell molecules in a magnetic field have potentially serious limitations. These solutions are mostly based on the approximation that the Zeeman frequency g-Omega is much greater than the rate for stimulated emission R and the rate for decay Gamma of the molecular state. Others are asymptotic solutions obtained for an angular momentum J = 1-0 transition. It has been unclear whether the polarizations due to plausible Zeeman splittings are adequately represented by the solutions obtained for g-Omega/Gamma much greater than 1 and g-Omega/R much greater than 1. Actual masing transitions tend to involve molecular states with angular momenta that are higher than J = 1 and 0. Numerical solutions for the linear polarization are presented here which do not have the foregoing restrictions on the g-Omega and which are not limited to a J = 1-0 transition.

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