Extragalactic Magnetism with SOFIA (SALSA Legacy Program): The Magnetic Fields in the Multiphase Interstellar Medium of the Antennae Galaxies*

Mergers are thought to be a fundamental channel for galaxy growth, perturbing the gas dynamics and magnetic fields (B-fields) in interstellar medium (ISM). However, mechanisms that amplify dissipate B-fields during merger remain unclear. We characterize morphology of ordered multi-phase ISM closest two spiral galaxies, Antennae galaxies. compare inferred using $154~\mu$m thermal dust $11$ cm radio synchrotron emission polarimetric observations. find more across galaxies than B-fields. The turbulent-to-ordered B-field increases at cores star-forming regions. relic arm has an B-field, while is radial. may dominated by turbulent dynamos with high $^{12}$CO(1-0) velocity dispersion driven regions, cospatial HI interaction. This result shows dissociation between warm mainly disturbed merger, dense still following arm. $\sim8.9$ kpc scale connecting base tidal tail compressed and/or sheared merger. suggest B-fields, respect rest system other supporting flow both tail.