SEMINÁRIO DO DEPARTAMENTO DE ASTRONOMIA
Galaxy Evolution in Dense Environments: Physical and Morphological Properties
a talk by Ciria Lima Dias (Universidad de La Serena, Chile)
Abstract:
Galaxy clusters are ideal laboratories for studying galaxy evolution in dense environments, and current multiwavelength surveys allow us to observe changes in the colors and morphology of galaxies across different filters. In this work, we utilize data from the Southern Photometric Local Universe Survey (S-PLUS), which includes 12 filters in the visible range of the spectrum, to analyze galaxies as a whole and to perform bulge-disc decomposition. Studying the distinct components of a cluster galaxy separately is crucial, as these components are influenced by the environment in different ways. We investigate the behavior of structural (Sérsic index and effective radius) and physical (stellar mass and star formation rate) properties of the galaxies and correlate them with the environment (clustercentric distance, local density, and substructure). We compare the relaxed and more massive Hydra cluster with the less massive and dynamically perturbed Antlia cluster. One of the results is that ~37 percent of the Hydra cluster galaxies have bluer bulges compared to their discs, indicating that the environment is quenching these galaxies from the outside-in.
Short-Bio:
Dr. Ciria Lima-Dias is a Brazilian astronomer whose work focuses on galaxy evolution in dense environments. She earned a B.Sc. in Physics from the Universidade Estadual de Feira de Santana and a M.Sc. in Astrophysics & Computational Physics from Universidade Cruzeiro do Sul, and completed her Ph.D. in Astronomy at the Universidad de La Serena. Her research has examined structural transformations and star-formation quenching in nearby galaxy clusters such as Hydra and Antlia in collaboration with the S-PLUS and CHANCES surveys.
Google Meet: https://meet.google.com/pcw-gmem-jyi
Link da transmissão: https://www.youtube.com/c/AstronomiaIAGUSP/live