Grain alignment and the magnetic field geometry in the filamentary dark cloud GF 9

Terry Jay Jones

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)3208-3212
Number of pages5
JournalAstronomical Journal
Volume125
Issue number6 1770
DOIs
StatePublished - Jun 2003

Keywords

  • ISM: magnetic fields

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