JCMT BISTRO Observations: Magnetic Field Morphology of Bubbles Associated with NGC 6334

We study the H ii regions associated with the NGC 6334 molecular cloud observed in the sub-millimeter and taken as part of the B-ﬁelds In STar-forming Region Observations (BISTRO) Survey. In particular, we investigate the polarization patterns and magnetic ﬁeld morphologies associated with these H ii regions. Through polarization pattern and pressure calculation analyses, several of these bubbles indicate that the gas and magnetic ﬁeld lines have been pushed away from the bubble, toward an almost tangential (to the bubble) magnetic ﬁeld morphology. In the densest part of NGC 6334, where the magnetic ﬁeld morphology is similar to an hourglass, the polarization observations do not exhibit observable impact from H ii regions. We detect two nested radial polarization patterns in a bubble to the south of NGC 6334 that correspond to the previously observed bipolar structure in this bubble. Finally, using the results of this study, we present steps (incorporating computer vision; circular Hough Transform) that can be used in future studies to identify bubbles that have physically impacted magnetic ﬁeld lines.