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Title:
Magnetic fields in molecular clouds - OH Zeeman observations
Authors:
Crutcher, R. M.; Troland, T. H.; Heiles, C.
Affiliation:
AA(Illinois, University, Urbana, IL), AB(California, University, Berkeley, CA), AC(California, University, Berkeley, CA)
Publication:
Astrophysical Journal, Part 1, vol. 249, Oct. 1, 1981, p. 134-137. (ApJ Homepage)
Publication Date:
10/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Absorption Spectra, Hydroxyl Radicals, Interstellar Magnetic Fields, Molecular Clouds, Zeeman Effect, Field Strength, H Lines, Power Spectra
DOI:
10.1086/159268
Bibliographic Code:
1981ApJ...249..134C

Abstract

OH Zeeman observations of the absorption lines produced in interstellar dust clouds toward 3C 133, 3C 123 and W51 lead to conservative, 3 sigma upper limits to the magnetic field at each position of 15, 25 and 30 microgauss, respectively. The line spectrum and the polarization-switched Zeeman spectrum were computed for each source using only normalized power spectra derived from the autocorrelation receiver.

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Physics
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