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Cluster spiral galaxies suffer catastrophic losses of the cool, neutral gascomponent of their interstellar medium due to ram pressure stripping,contributing to the observed quenching of star formation in the disk comparedto galaxies in lower density environments. However, the short term effects ofram pressure on the star formation rate and AGN activity of galaxies undergoingstripping remain unclear. Numerical studies have recently demonstrated cosmicrays can dramatically influence galaxy evolution for isolated galaxies, yettheir influence on ram pressure stripping remains poorly constrained. Weperform the first cosmic-ray magneto-hydrodynamic simulations of an $L_{*}$galaxy undergoing ram pressure stripping, including radiative cooling,self-gravity of the gas, star formation, and stellar feedback. We find themicroscopic transport of cosmic rays plays a key role in modulating the starformation enhancement experienced by spirals at the outskirts of clusterscompared to isolated spirals. Moreover, we find that galaxies undergoing rampressure stripping exhibit enhanced gas accretion onto their centers, which mayexplain the prevalence of AGN in these objects. In agreement with observations,we find cosmic rays significantly boost the global radio emission of clusterspirals. Although the gas removal rate is relatively insensitive to cosmic rayphysics, we find that cosmic rays significantly modify the phase distributionof the remaining gas disk. These results suggest observations of galaxiesundergoing ram pressure stripping may place novel constraints on cosmic-raycalorimetry and transport.

Stress-Testing Cosmic Ray Physics: The Impact of Cosmic Rays on the Surviving Disk of Ram Pressure Stripped Galaxies