PIRSA:15080003

21cm fluctuations in the dark ages and cosmic heat flows

Ali-Haimoud, Y. (2015). 21cm fluctuations in the dark ages and cosmic heat flows. Perimeter Institute. https://pirsa.org/15080003

Ali-Haimoud, Yacine. 21cm fluctuations in the dark ages and cosmic heat flows. Perimeter Institute, Aug. 12, 2015, https://pirsa.org/15080003 

          @misc{ pirsa_PIRSA:15080003,
            doi = {10.48660/15080003},
            url = {https://pirsa.org/15080003},
            author = {Ali-Haimoud, Yacine},
            keywords = {Cosmology, Other},
            language = {en},
            title = {21cm fluctuations in the dark ages and cosmic heat flows},
            publisher = {Perimeter Institute},
            year = {2015},
            month = {aug},
            note = {PIRSA:15080003 see, \url{https://pirsa.org}}
          }

Yacine Ali-Haimoud Johns Hopkins University

DOI 10.48660/15080003
Collection
Talk Type Conference
Subject

Abstract

The spin-flip transition in neutral hydrogen may be used to probe large-scale structure at high redshifts, before the first luminous objects formed. The huge number of modes potentially accessible make this a very promising avenue. I will discuss several key unknowns that could be measured with high-redshift 21cm surveys: primordial non-gaussianity, the primordial small-scale power spectrum, and dark-matter-baryon interactions. I will close by discussing CMB spectral distortions, another promising probe of early Universe physics, and illustrate how they can be used to test dark-matter interactions with standard model particles.