S-PLUS photometry of Fornax cl. GC candidates

The survey is centered on the NGC 1399 galaxy, extending out to 5 virial radii (Rvir) of the cluster. We carried out a photometric study using images observed in the 12-band system of the Southern Photometric Local Universe Survey (S-PLUS), corresponding to 106 pointings, covering a sky area of ~208 square degrees.

Studying the properties of spectroscopically confirmed GCs, we have designed a method to select GC candidates using structural and photometric parameters. We found evidence of color bimodality in two broadband colors, namely (g-i)_0_ and (g-z)_0_, while, in the narrow bands, we did not find strong statistical evidence to confirm bimodality in any color. We analyzed the GCs luminosity functions (GCLF) in the 12 bands of S-PLUS, and we can highlight two points: (a) due to the relatively shallow depth of S-PLUS, it is only possible to observe the bright end of the GCLF and, (b) at that level, in all of the bands, it can be considered to be the log-normal distribution typical for GC systems.