Magnetic fields play an important role in the formation and evolution of a galaxy, but it is challenging to measure them by observation. Leo Triplet member NGC3627 was a subject of determining magnetic field orientation via Velocity Gradient Technique (VGT) using spectroscopic data. The agreement of the VGT-CO and polarization suggests that the magnetic fields associated with synchrotron emission also percolate through star-forming regions. The VGT-H_α measurement reveals the magnetic fields in the warm ionized medium that permeates the disc and disc’s vicinity so that it exhibits less agreement with polarization. More...