Pixel Colour­Magnitude Diagram Analysis of the  Fornax Cluster using S­PLUS images (Part II)

SMITH CASTELLI, A.; FAIFER, F.; ESCUDERO, C.; SESTO, L.

La Plata

Workshop; IX LAPIS - S-PLUS: The Universe in True Colors; 2020

FCAG - UNLP

We use S-PLUS images of the Fornax Cluster in the 5 u?g?r?i?z? broad-bandfilters to construct individual colour?magnitude diagrams of thegalaxies such that each point corresponds to one pixel of a galaxyimage. A pixel-by-pixel analysis provides a novel way of looking at thestellar populations and structures of galaxies and reveals informationthat an analysis of integrated light does not. Prior to the constructionof these diagrams, fluxes were converted from counts per pixel toapparent magnitude per square arcsecond by considering the pixelscale, and subsequently, calibrated to the standard system. Finally,we applied the Galactic extinction coefficient values from theNASA/IPAC Extragalactic Database (NED).