Parente Massimiliano
Italy – SISSA
From voids to clusters: star formation and dust in the cosmic web
The large-scale environment is believed to impact galaxy evolution, but there is still no consensus regarding the mechanisms. In this talk I will present a novel study of the star formation and dust content of local galaxies in different cosmic environments, namely voids, walls, filaments, and nodes. The work exploits the theoretical predictions of a semi-analytic model (SAM) of galaxy formation, alongside data from SDSS-DR16 and GAMA observations. In our model, low mass galaxies exhibit larger star formation and dust content in less dense environments, reflecting the slower mass assembly in underdense regions. Conversely, in more massive galaxies differences among environments are milder due to the disc instability driven supermassive black hole (SMBH) growth implemented in the SAM, which makes galaxy quenching environment insensitive. The agreement between our predictions and observations is encouraging, particularly in the high mass range, where sSFRs and dust masses appear environment-insensitive. This study highlights the importance of the in-situ SMBH growth, and emphasizes the power of studying galaxy evolution through the perspective of large-scale environments.