Measurement of magnetic field strength in the dark cloud Barnard 1

Details Measurement of magnetic field strength in the dark cloud Barnard 1 Measurement of magnetic field strength in the dark cloud Barnard 1

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338l..61g&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 338, March 15, 1989, p. L61-L64.

Astronomy and Astrophysics

Astrophysics

72

Dark Matter, Interstellar Magnetic Fields, Interstellar Matter, Molecular Clouds, Zeeman Effect, Hydroxyl Emission, Line Spectra, Magnetic Flux, Star Formation, Stellar Mass

Scientific paper

The detection of the Zeeman effect in OH emission in the dark cloud Barnard 1 is reported. The region of the OH emission in B1 extends over 1.1 pc, has 1.3 km/s linewidth, and has mean column density of 6 x 10 to the 21st/sq cm. The detected field strength, -27 + or - 4 micro-G, agrees well with two estimates of equilibrium field strength derived from the observations, and also with the evolutionary model of Mouschovias (1976, 1987).

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