Upper limits to magnetic fields in C II regions

Details Upper limits to magnetic fields in C II regions Upper limits to magnetic fields in C II regions

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..694s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 15, 1984, p. 694-697. Research supported by the Perkin-Elmer Cor

Astronomy and Astrophysics

Astronomy

7

Circular Polarization, Hydrogen Clouds, Interstellar Magnetic Fields, Molecular Clouds, Radio Sources (Astronomy), Zeeman Effect, Carbon, Interstellar Masers, Line Spectra, Radio Spectra, Reflection Nebulae

Scientific paper

Using the Arecibo 305 m telescope and a circularly polarized feed, the C166-alpha lines were observed toward four C II regions associated with W48, S87, S88B, and M78. These sources were chosen for observations due to their strong, narrow carbon radio recombination lines. Using the Zeeman effect and the observed left and right circularly polarized components of the carbon lines, upper limits of a milligauss were set for the line-of-sight magnetic fields in C II regions. If the interstellar magnetic field scales with gas density n according to an n-to-the-alpha-power law, these results require alpha to be less than 2/3.

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