PIRSA:14110145

Dwarf Galaxies as Cosmological Probes

Navarro, J. (2014). Dwarf Galaxies as Cosmological Probes. Perimeter Institute. https://pirsa.org/14110145

Navarro, Julio. Dwarf Galaxies as Cosmological Probes. Perimeter Institute, Nov. 27, 2014, https://pirsa.org/14110145 

          @misc{ pirsa_PIRSA:14110145,
            doi = {10.48660/14110145},
            url = {https://pirsa.org/14110145},
            author = {Navarro, Julio},
            keywords = {Strong Gravity},
            language = {en},
            title = {Dwarf Galaxies as Cosmological Probes},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {nov},
            note = {PIRSA:14110145 see, \url{https://pirsa.org}}
          }

Julio Navarro University of Victoria

DOI 10.48660/14110145
Collection
Talk Type Scientific Series
Subject

Abstract

A prime challenge to our understanding of galaxy formation concerns the scarcity of dwarf galaxies compared with the numerous low-mass halos expected in the current ΛCDM paradigm. This is usually accounted for by assuming that energetic feedback from evolving stars confines dwarf galaxy formation to relatively massive halos spanning a narrow mass range. I will highlight a number of observations that may be used to test this assumption and discuss the puzzles and challenges that arise from this analysis. I will also discuss a number of challenges that ΛCDM faces on the scale of dwarf galaxies and their possible resolutions.