Dwarf Galaxies, Globular Clusters, and Ultra-compact Dwarfs: Getting to know the outer halo of NGC5128

Populations of low-mass satellites like dwarf galaxies, globular clusters (GCs), and ultra-compact dwarf galaxies (UCDs) are common features of giant galaxies throughout the universe. Recent years have seen an acceleration in the discovery rate of such satellites in the Local Universe, with the subsequent unveiling of coherent satellite phase-space structures like groups and planes that are of great utility in near-field cosmological studies. In an effort to push this field further, optical u'g'r'i'z' imaging of 22 sq. deg. centered on the nearby giant elliptical galaxy NGC5128, as part of the Survey of Centaurus A's Baryonic Structures campaign, has been searched for new low-mass satellites. We will present the early results, including a rich system of >3000 GCs, ~50 new dwarf galaxy candidates, and at least 20 UCDs all within ~225 kpc of their host galaxy. We will present their overall stellar mass and stellar population properties, spatial distributions in NGC5128's halo in relation to other known low-mass satellites, and highlight the potential utility of outer halo GCs to trace minor merging events in the recent past of giant galaxies. Looking toward the future, tracing giant galaxy kinematic profiles out to such large (100s of kpc) radii with next-generation wide-field multi-object spectrometers will constrain the ubiquity of so-called "satellite planes", reveal velocity substructure hinting at dwarf galaxy accretion events, with the overall potential to revolutionize observational near-field cosmological studies.