VLA H I and OH Zeeman observations toward M17

We have carried out high-resolution (similar to 26) VLA H I Zeeman and main-line OH Zeeman observations toward M17. The morphology of the 26 resolution H I line-of-sight magnetic field strength (B-los) images show general agreement with those presented in Paper I with similar to 60 resolution. The similarities include the rise of the 20 km s(-1) B-los toward the H II region/M17 SW interface and the concentration of high 11-17 km s(-1) B-los to the northwest. However, the similar to 26 H I B-los reported here are up to 2 times stronger than those measured with similar to 60 resolution, suggesting that there is small-scale structure in the M17 SW magnetic field. H I B-los values as high as similar to -750 muG are detected toward the M17 H II region/M17 SW interface region at 20 km s(-1). OH 1665 MHz B-los Zeeman detections (with similar to 22 resolution) were also made toward five similar to1' regions along the M17 H II region/M17 SW interface. The average line-of-sight magnetic field strength (B-los) in the three northern OH detection regions is similar to +250 muG. Another of the OH condensations is positionally and kinematically coincident with the region of high H I B-los detected toward the M17 SW interface at 20 km s(-1) and has similar B-los. The higher resolution H I Zeeman detections presented here support the Dndings of Paper I, which indicated that the M17 SW B los molecular cloud core is magnetically supercritical and subvirial, but is in approximate dynamic equilibrium as a whole. Assuming that the northern OH condensations are self-gravitating, we find that the critical magnetic field strength (B-S,B-crit) needed to provide total support against gravity is similar to3 times higher than the average observed B-los value. Our estimates also show that even including support from the magnetic wave energy (assumed equal to that of the nonthermal motions), these northern OH condensations cannot support themselves against gravitational collapse.