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The role of mass and environment in galaxy evolution

Ana S. P. Afonso

The VIMOS Spectroscopic Survey of a Supercluster in the COSMOS field (VIS3COS) aims to accurately map in 3D a superstructure at 0.8<z<0.9, which contains 3 massive X-rays confirmed clusters and shows a striking filamentary structure in the HiZELS Ha survey at z=0.84 (Sobral et al. 2011). The ~500 spectroscopic members probe a wide range of densities and environments (from fields to the cluster outskirts/rich groups). I will present this survey (Paulino-Afonso et al., accepted for publication on A&A) and our efforts to detail and understand the mass-environment relation, the nature of post-starburst galaxies and the role of mergers. Mass or environment: which plays the key role? Can we witness the transformation of the blue sequence into the red sequence? If so, where is it more prominent: in the filaments, groups or clusters? Is this transformation also being encoded in the galaxy morphology? And what is happening to the interstellar medium pressure (or electron density)? Do we still have an evidence for an environmental dependence of the electron density as reported by Darvish et al. (2015) at z~1 and when we probe a wide range of overdensities and different mass regimes?

2018 June 14, 15:00

Centro de Astrofísica da Universidade do Porto (Classroom)
Rua das Estrelas, 4150-762 Porto

Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia