Highly Polarized Thermal Dust Emission in the Bok Globule CB 068

JP Vallée, P Bastien, Jane Sophia Greaves

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

We have observed five Bok globules (CB 003, CB 034E, CB 054, CB 068, and CB 230) in the continuum near a wavelength of 850 mum with a new imaging polarimeter at the James Clerk Maxwell Telescope and made a CO J = 3-2 line observation of one globule (CB 068). The globule CB 068 has a linear polarization near 10%, about 4 times as high as in previous observations of star-forming cores near the same wavelength. CB 068 may be a young class 0 object, being detected with IRAS at long wavelengths only and having a weak CO outflow. The strong linear polarization in CB 068 suggests that some cold Bok globules have highly ordered magnetic fields and environments which provide good conditions for grain alignment. A scenario to remove turbulence from the centers of Bok globules is proposed, based on a strong magnetic field alignment.

Original languageEnglish
Pages (from-to)352-358
Number of pages7
JournalAstrophysical Journal
Volume542
Issue number1
Publication statusPublished - 10 Oct 2000

Keywords

  • dust, extinction
  • infrared : ISM : continuum
  • ISM : globules
  • ISM : magnetic fields
  • polarization
  • stars : formation
  • YOUNG STELLAR OBJECTS
  • STAR-FORMATION
  • INTERSTELLAR GRAINS
  • RADIATIVE TORQUES
  • MOLECULAR CLOUDS
  • POLARIMETRY
  • OUTFLOW
  • REGIONS
  • CORES
  • JCMT

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