Physical Conditions in Dark Interstellar Clouds: Magnetic Field Strength and Density

Details Physical Conditions in Dark Interstellar Clouds: Magnetic Field Strength and Density Physical Conditions in Dark Interstellar Clouds: Magnetic Field Strength and Density

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jkas...14...37h&link_type=abstract

Journal of the Korean Astronomical Society, vol. 14, no. 1, p. 37-42

Astronomy and Astrophysics

Astronomy

Scientific paper

In order to know the magnetic field increase with density in interstellar clouds, we have analyzed observations of extinction and polarized for stars in the rho Oph molecular cloud comples. The size of grains in dense parts of the complex is estimated to be larger than the ones in diffuse interstellar clouds by about 15 percent in radii. Employing the Davis-Greenstein mechanism for grain alignment with this estimated grain size, we have put constraints on the exponent in the field-density relation B ~ n^x: 1/5 <= x <= 1/3. It is colcluded that the classical expectation based on the approximation of isotropic contraction with complete frozen-in flux.

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