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| Paper: |
Atomic Fluorescence and Prospects for Observing Magnetic Geometry
Using Atomic Magnetic Realignment |
| Volume: |
449, Astronomical Polarimetry 2008: Science from Small to Large Telescopes |
| Page: |
147 |
| Authors: |
Nordsieck, K. |
| Abstract: |
Yan and Lazarian have proposed a new technique through which the
magnetic field geometry in the diffuse interstellar medium, or in
circumstellar matter, could be determined from the linear polarization
of interstellar absorption or fluorescence emission lines from ions
pumped by an anisotropic illuminating flux. New long-slit spectroscopic
observations of the reflection nebula NGC 2023, obtained with the
Southern African Large Telescope Robert Stobie Spectrograph (RSS), have
detected a number of atomic fluorescence lines of OI, NII, SiII, and FeII
for the first time in a neutral medium. A model which predicts these
lines and others illustrates which lines would be appropriate targets
for an RSS spectropolarimetric investigation of this new diagnostic. |
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