We present the results of wide-field JHK _ { S } polarimetry toward the H II region S106 using the IRSF ( Infrared Survey Facility ) telescope .
Our polarimetry data revealed an extended ( up to \sim 5 \arcmin ) polarized nebula over S106 .
We confirmed the position of the illuminating source of most of the nebula as consistent with S106 IRS 4 through an analysis of polarization vectors .
The bright portion of the polarized intensity is consistent with the red wing component of the molecular gas .
Diffuse polarized intensity emission is distributed along the north–south molecular gas lanes .
We found the interaction region between the radiation from S106 IRS 4 and the dense gas .
In addition , we also discovered two small polarization nebulae , SIRN 1 and SIRN 2 , associated with a young stellar objects ( YSO ) .
Aperture polarimetry of point-like sources in this region was carried out for the first time .
The regional magnetic field structures were derived using point-like source aperture polarimetry , and the magnetic field structure position angle around the cluster region in S106 was found to be \sim 120 \arcdeg .
The magnetic fields in the cluster region , however , have three type position angles : \sim 20 \arcdeg , \sim 80 \arcdeg , and \sim 120 \arcdeg .
The present magnetic field structures are consistent with results obtained by submillimeter continuum observations .
We found that the magnetic field direction in the dense gas region is not consistent with that of the low density gas region .