Highly Polarized Thermal Dust Emission in the Bok Globule CB 068

Details Highly Polarized Thermal Dust Emission in the Bok Globule CB 068 Highly Polarized Thermal Dust Emission in the Bok Globule CB 068

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...542..352v&link_type=abstract

The Astrophysical Journal, Volume 542, Issue 1, pp. 352-358.

Astronomy and Astrophysics

Astronomy

20

Ism: Dust, Extinction, Infrared: Ism: Continuum, Ism: Globules, Ism: Magnetic Fields, Polarization, Stars: Formation

Scientific paper

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 μm 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.

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