Linear polarization of molecular lines at radio frequencies

Details Linear polarization of molecular lines at radio frequencies Linear polarization of molecular lines at radio frequencies

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...285..126d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 285, Oct. 1, 1984, p. 126-133.

Astronomy and Astrophysics

Astronomy

26

Astronomical Spectroscopy, Interstellar Matter, Linear Polarization, Molecular Clouds, Molecular Spectra, Radio Sources (Astronomy), Carbon Monoxide, Line Spectra, Optical Thickness, Radiative Transfer

Scientific paper

Calculations of the linear polarization of molecular emission lines from interstellar clouds at radio frequencies are extended by taking into account several coupled rotational states of a diatomic molecule. The goal of the calculations is to provide improved predictions of polarization with which to evaluate the observational results of Wannier, Scoville, and Barvainis (1983). It is found that the inclusion of additional states tends to decrease the maximum polarizations by a factor of about 2, except during superthermal excitation. The maximum polarizations obtained for the J = 2 to 1 transition tend to be somewhat less than those for J = 1 to 0. The polarization effects for a single-dish radio telescope are also estimated.

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