Magnetic Field Structure Measured in Protoplanetary Disk HD 142527

Researchers, led by Project Assistant Professor Satoshi Ohashi (NAOJ), have measured the magnetic field structure in the protoplanetary disk HD 142527 using the Atacama Large Millimeter/submillimeter Array (ALMA). Analyzing ALMA data at 0.9, 1, 2, and 3 mm, they found intense dust polarization primarily due to the magnetic field. The magnetic field strength was estimated to be approximately 0.3 milligauss along the rotation direction and 0.1 milligauss in both the vertical direction and towards the central star. This 3D structure may induce strong turbulence within the disk. This marks the first time the detailed magnetic field structure has been observed in a protoplanetary disk. These findings provide a method for measuring the 3D structure and strength of magnetic fields, aiding future observations of protoplanetary disk magnetic fields and research into how magnetic fields influence planet formation.