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Distortion of magnetic fields in the pre-stellar core Barnard 68

  • Ryo Kandori (a1), Motohide Tamura (a1), Ken-ichi Tatematsu (a1), Nobuhiko Kusakabe (a1), Yasushi Nakajima (a1) and the IRSF/SIRPOL group...

Abstract

Magnetic fields are believed to play an important role in controlling the stability and contraction of molecular cloud cores. In the present study, magnetic fields of a cold pre-stellar core, Barnard 68, have been mapped based on wide-field near-infrared polarimetric observations of background stars. A distinct “hourglass-shaped” magnetic field is identified toward the core, as the observational evidence of magnetic field structure distorted by mass accumulation in a pre-stellar core. Our findings on the geometry of magnetic fields as well as the mass-to-magnetic flux ratio are presented.

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References

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