Mapping Halpha in the Fornax cluster with S-PLUS

LOPES, A. R.; SMITH CASTELLI, A.V.; TELLES, E.; THAINA-BATISTA, J.; CID FERNANDES, R.

Buenos Aires

Congreso; 64° Reunión Anual de la Asociación Argentina de Astronomía; 2022

Emission lines in galaxies are a valuable source of information, as it allows the analysis of starformation activity and the identification of active galactic nuclei, among other proprieties. The filter configuration of S-PLUS, a wide field 12 photometric band (5 broad and 7 narrow) optical survey observing the Southern Sky, is ideal to detect such emission. The investigation of the characteristics of emitters in higher density environments can give us clues about the origin of such objects. Do they present a specific location within the cluster? Is the emission morphology extended or concentrated? In this context, the Fornax cluster is a great target to be analyzed, as at its distance (∼ 20 Mpc), the Hα emission line is located within the J0660 band, and the angularsizes of its galaxy members enable the study of the internal emission distribution. For such, we developed a code that performs a pixel-to-pixel application of the Three Filter Method to S-PLUS images in order to create Hα+[NII] maps for Fornax members. In this contribution we present the methodology, compare our Hα maps with others estimations derived by an SED fitting approach, and discuss our main results for 48 Fornax galaxies, where the maps were successfully created.