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Enshrouded in several well-known controversies, dwarf galaxies have beenextensively studied to learn about the underlying cosmology, notwithstandingthat physical processes regulating their properties are poorly understood. Toshed light on these processes, we introduce the Pandora suite of 17high-resolution (3.5 parsec half-cell side) dwarf galaxy formation cosmologicalsimulations. Commencing with thermo-turbulent star formation and mechanicalsupernova feedback, we gradually increase the complexity of physicsincorporated leading to full-physics models combining magnetism, on-the-flyradiative transfer and the corresponding stellar photoheating, andSN-accelerated cosmic rays. We investigate combinations of these processes,comparing them with observations to constrain what are the main mechanismsdetermining dwarf galaxy properties. We find hydrodynamical `SN feedback-only'simulations struggle to produce realistic dwarf galaxies, leading either tooverquenched or too centrally concentrated, dispersion dominated systems whencompared to observed field dwarfs. Accounting for radiation with cosmic raysresults in extended and rotationally-supported systems. Spatially `distributed'feedback leads to realistic stellar and HI masses as well as kinematics.Furthermore, resolved kinematic maps of our full-physics models predictkinematically distinct clumps and kinematic misalignments of stars, HI and HIIafter star formation events. Episodic star formation combined with itsassociated feedback induces more core-like dark matter central profiles, whichour `SN feedback-only' models struggle to achieve. Our results demonstrate thecomplexity of physical processes required to capture realistic dwarf galaxyproperties, making tangible predictions for integral field unit surveys, radiosynchrotron emission, and for galaxy and multi-phase interstellar mediumproperties that JWST will probe.

The Pandora project. I: the impact of radiation and cosmic rays on baryonic and dark matter properties of dwarf galaxies