Rutgers University Astrophysics Seminar

The current standard of cold dark-matter (CDM) fails on small scales. Supernova-driven feedback from star-formation is thought to solve the small-scale problem often referred to as the core/cusp problem.  It is now possible to observe (thanks to recent progress with integral field units) both the dark matter properties of distant star-forming galaxies and the content of gaseous halos around galaxies. In particular, the cool circum-galactic medium does contain the imprints of feedback.  I'll present recent MUSE results on these fronts and discuss whether the constraints on feedback from observations of the CGM and from the rotation curves of galaxies are compatible.