Astronomy and Astrophysics – Astronomy
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.5303c&link_type=abstract
American Astronomical Society Meeting 202, #53.03; Bulletin of the American Astronomical Society, Vol. 35, p.772
Astronomy and Astrophysics
Astronomy
Scientific paper
We have mapped linearly polarized dust emission from L183 with the JCMT SCUBA polarimeter and have analyzed these and our previously published data for the prestellar cores L183, L1544, and L43 in order to estimate magnetic field strengths. The polarization analysis used the Chandrasekhar-Fermi technique, which relates the dispersion in polarization position angles to the field strength in the plane of the sky. The dust cores sampled by the observations have typical diameters of about 0.05 pc, densities n(H2) ˜ 3 x 105, and masses of 1-2 Msun. The inferred magnetic field strengths were about 0.1 mG, which imply mass-to-magnetic flux ratios approximately twice critical. We will discuss the implications of these results for magnetic support of cores and for star formation.
RMC acknowledges partial supported of this research under NSF grant AST 02-05810. DJN wishes to thanks PPARC for studentship support.
Crutcher Richard M.
Nutter David J.
Ward-Thompson Derek
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