VLA OH and H I Zeeman observations of the NGC 6334 complex

A. P. Sarma, T. H. Troland, D. A. Roberts, R. M. Crutcher

Research output: Contribution to journalArticlepeer-review

Abstract

We present OH and H I Zeeman observations of the NGC 6334 complex taken with the Very Large Array. The OH absorption profiles associated with the complex are relatively narrow (ΔυFWHM ∼ 3 km s-1) and single-peaked over most of the sources. The H I absorption profiles contain several blended velocity components. One of the compact continuum sources in the complex (source A) has a bipolar morphology. The OH absorption profiles toward this source display a gradient in velocity from the northern continuum lobe to the southern continuum lobe; this velocity gradient likely indicates a bipolar outflow of molecular gas from the central regions to the northern and southern lobes. Magnetic fields of the order of 200 μG have been detected toward three discrete continuum sources in the complex. Virial estimates suggest that the detected magnetic fields in these sources are of the same order as the critical magnetic fields required to support the molecular clouds associated with the sources against gravitational collapse.

Original languageEnglish (US)
Pages (from-to)271-280
Number of pages10
JournalAstrophysical Journal
Volume533
Issue number1 PART 1
DOIs
StatePublished - Apr 10 2000

Keywords

  • H II regions
  • ISM: clouds
  • ISM: individual (NGC 6334)
  • ISM: kinematics and dynamics
  • ISM: magnetic fields
  • ISM: molecules

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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