Interferometric Mapping of Magnetic Fields: The massive star forming region G34.4+0.23 MM

Details Interferometric Mapping of Magnetic Fields: The massive star forming region G34.4+0.23 MM Interferometric Mapping of Magnetic Fields: The massive star forming region G34.4+0.23 MM

2008-01-28

arxiv.org/abs/0801.4316v1

Astronomy and Astrophysics

Astrophysics

Accepted to be published at ApJ

Scientific paper

10.1086/524355

We report millimeter interferometric observations of polarized continuum and line emission from the massive star forming region G34.4. Polarized thermal dust emission at 3 mm wavelength and CO $J=1 \to 0$ line emission were observed using the Berkeley-Illinois-Maryland Association (BIMA) array. Our results show a remarkably uniform polarization pattern in both dust and in CO J=$1 \to 0$ emission. In addition, the line emission presents a consistent uniform polarization pattern over most of the velocity channel maps. These uniform polarization patterns are aligned with the north-south main axis of the filament between the main millimeter source (MM) and the ultra-compact H {\scriptsize II} region, which are the central sources in G34.4, suggesting a magnetic field orthogonal to this axis. This morphology is consistent with a magnetically supported disk seen roughly edge-on.

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