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An order of magnitude more dwarf galaxies are expected to inhabit the LocalGroup, based on currently accepted galaxy formation models, than have beenobserved. This discrepancy has been noted in environments ranging from thefield to rich clusters. However, no complete census of dwarf galaxies exist inany environment. The discovery of the smallest and faintest dwarfs is hamperedby the limitations in detecting such faint and low surface brightness galaxies.An even greater difficulty is establishing distances to or group/clustermembership for such faint galaxies. The M81 group provides an almost uniqueopportunity for establishing membership for galaxies in a low density regioncomplete to magnitudes as faint as M_{r'} = -10. With a distance modulus of27.8, the tip of the red giant branch just resolves in ground-based surveys. Wehave surveyed a 65 square degree region around M81 with the CFHT/MegaCam. Fromthese images we have detected 22 new dwarf galaxy candidates. Photometric,morphological, and structural properties are presented for the candidates. Thegroup luminosity function has a faint end slope characterized by the parameteralpha = -1.27+/-0.06. We discuss implications of this dwarf galaxy populationon cosmological models.

Discovery of New Dwarf Galaxies in the M81 Group