PIRSA:12020160

Dipoles in the Sky

Huterer, D. (2012). Dipoles in the Sky. Perimeter Institute. https://pirsa.org/12020160

Huterer, Dragan. Dipoles in the Sky. Perimeter Institute, Feb. 28, 2012, https://pirsa.org/12020160 

          @misc{ pirsa_PIRSA:12020160,
            doi = {10.48660/12020160},
            url = {https://pirsa.org/12020160},
            author = {Huterer, Dragan},
            keywords = {Cosmology},
            language = {en},
            title = {Dipoles in the Sky},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {feb},
            note = {PIRSA:12020160 see, \url{https://pirsa.org}}
          }

Dragan Huterer University of Michigan–Ann Arbor

DOI 10.48660/12020160
Collection
Talk Type Scientific Series
Subject

Abstract

The standard cosmological model posits that the universe is homogeneous and statistically isotropic on its largest scales. However, there is no fundamental reason why these properties have to hold, and in fact they can be broken due to interesting new physics. Moreover, there is some evidence from recent WMAP observations for 'anomalies' - including departures from statistical isotropy - on the largest observable scales. Large-scale structure (LSS) - including the distribution of galaxies in the universe - presents a new frontier in testing statistical isotropy and homogeneity, and we are entering an epoch with orders-of-magnitude improvement in the statistics of LSS. In this talk I first review general tests of statistical isotropy using LSS. I then describe results from research done in collaboration with my student Cameron Gibelyou on testing aspects of the statistical isotropy - in particular, dipolar modulations of the galaxy counts - using existing LSS surveys.