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Expected far infrared polarization of H2 regions and the nuclei of galaxies (1974)

Harwit, M. O.

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Publication Date: 2019-06-27

Description: The expected polarization of far infrared sources is discussed, and it is shown that the observed degree of polarization generally depends on two factors: (1) the availability of a mechanism that can produce polarization, and (2) the gain in polarization which absorption or stimulated emission can produce within a source. It is pointed out that stimulated emission could produce sizeable gain changes in compact dust clouds such as those associated with H2 regions and possibly also in dense regions exhibiting OH and H2O masers. Whether such a gain can actually become positive (maser-like behavior) is not clear, but this would in any case depend on the chemical structure of the grain material and the spectral range of interest.

Keywords: ASTROPHYSICS

Type: ESRO H2 Regions and the Galactic Centre; p 179-184

Format: text

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