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We present our discovery and analysis of dwarf galaxies in the NGC 3585galaxy group by the KMTNet Supernova Program. Using deep stack images reaching$\simeq$ 28 mag arcsec$^{-2}$ in $BVI$, we discovered 46 dwarf galaxycandidates distributed in a 7 square degree field. The dwarf galaxy candidatesexhibit central surface brightness as faint as $\mu_{0,V} = 26.2$ magarcsec$^{-2}$, with effective radii larger than 150 pc and total absolutemagnitudes brighter than $M_V \approx -10$ mag, if at the distance of NGC 3585.The dwarf galaxy surface number density decreases with projected distance fromNGC 3585. We estimate the background contamination to be about 20% based bothon the number density profile and on diffuse galaxy counts in a control field.The dwarf galaxy colors and Sersic structural parameters are consistent withthose found for other dwarf galaxies. Unusually, there is no indication of achange of color or brightness in the dwarf galaxy candidates with projecteddistance from the group center. Approximately 20% of them contain an unresolvednucleus. The nucleated fraction is larger for brighter (and redder) galaxiesbut is independent of distance from the group center. We identify fourultra-diffuse galaxy candidates, all near the group center. We interpret thesespatial properties as suggesting that the NGC 3585 group might be dynamicallyyounger than the typical group. The galaxy luminosity function of the NGC 3585group has a faint-end slope of $\alpha\approx -1.39$, which is roughlyconsistent with the slopes found for other nearby groups. The possibledependence of the slope on global group properties is still unclear, andcontinues to motivate our homogeneous deep survey of dozens of nearby groups.

Dwarf Galaxy Discoveries from the KMTNet Supernova Program II. The NGC 3585 Group and Its Dynamical State