Grain Alignment and the Magnetic Field Geometry in the Filamentary Dark Cloud GF 9

Details Grain Alignment and the Magnetic Field Geometry in the Filamentary Dark Cloud GF 9 Grain Alignment and the Magnetic Field Geometry in the Filamentary Dark Cloud GF 9

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....125.3208j&link_type=abstract

The Astronomical Journal, Volume 125, Issue 6, pp. 3208-3212.

Astronomy and Astrophysics

Astronomy

7

Ism: Magnetic Fields

Scientific paper

We present measurements of the interstellar polarization at 1.65 μm of stars shining through the filamentary dark cloud GF 9. Unlike many dark clouds, the interstellar polarization through GF 9 increases significantly with increasing extinction through the cloud. We find the magnetic field geometry in GF 9-core is very smooth, in agreement with results from far-infrared polarimetry by Clemens, Kraemer, & Ciardi (published in 1999). Our much more limited results for GF 9-filament are consistent with a disordered field, also in agreement with the far-infrared polarimetry. Comparison of the near-infrared and far-infrared position angles suggests that there is a moderate rotation in the projected magnetic field direction from the exterior to the interior of GF 9-core.

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