Institute for Advanced Study Informal Astrophysics Seminar

Reports on the detection of local and global modulations of star formation in galaxies are reviewed and compared to results from semi-analytic models. The latter are used for the following main objectives, i) to study the expected extent of the influence of individual galaxies on their neighbors, ii) to assess the influence of the halo merger histories on the properties of the galaxies, and iii) to characterise the relation between halo assembly and local/global environments.