The faint end of the Centaurus A satellite luminosity function

Understand

The Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS) is constructing a wide-field map of the resolved stellar populations in the extended halos of these two nearby, prominent galaxies.

• We present new Magellan/Megacam imaging of a $\sim3$ deg$^2$ area around Centaurus A (Cen A), which filled in much of our coverage to its south, leaving a nearly complete halo map out to a projected radius of $\sim$150 kpc and allowing us to identify two new resolved dwarf galaxies.
• We have additionally obtained deep Hubble Space Telescope (HST) optical imaging of eleven out of the thirteen candidate dwarf galaxies identified around Cen A and presented in Crnojevi\'c et al.
• (2016): seven are confirmed to be satellites of Cen A, while four are found to be background galaxies.