The Measurement of the Orientation of the Magnetic Field in Molecular Clouds

Details The Measurement of the Orientation of the Magnetic Field in Molecular Clouds The Measurement of the Orientation of the Magnetic Field in Molecular Clouds

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ap%26ss.292..127h&link_type=abstract

Astrophysics and Space Science, v. 292, Issue 1, p. 127-134 (2004).

Astronomy and Astrophysics

Astrophysics

1

Ism Cloud, Ism Individual (M17), Ism Individual (Orion), Ism Magnetic Field, Ism Polarization, Ism Radio Lines

Scientific paper

We discuss how the combination of polarimetry and ion-to-neutral molecular line width ratio measurements permits the determination of the magnitude and orientation of the magnetic field in the weakly ionized parts of molecular clouds. Polarimetry measurements give the field orientation in the plane of the sky and the ion-to-neutral molecular line width ratio determines the angle between the magnetic field and the line of sight. We show the first results obtained with this technique on the M17 and Orion A star-forming region using Hertz 350 μm polarimetry maps and HCO+-to-HCN molecular line width ratios to provide the first view of the spatial orientation of the magnetic field these molecular clouds.

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