Interferometric mapping of magnetic fields: The massive star-forming region G34.4+0.23 MM

P. C. Cortes, R. M. Crutcher, D. S. Shepherd, L. Bronfman

Research output: Contribution to journalArticlepeer-review


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 → 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 → 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 ultracompact H 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.

Original languageEnglish (US)
Pages (from-to)464-471
Number of pages8
JournalAstrophysical Journal
Issue number1
StatePublished - Mar 20 2008


  • ISM: magnetic fields
  • Stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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