• Corpus ID: 116312924

Finding the Missing Baryons Using CMB as a Backlight

  title={Finding the Missing Baryons Using CMB as a Backlight},
  author={Shirley Ho and Simon Dedeo and David N. Spergel},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
We present a new method for detecting the missing baryons by generating a template for the kinematic Sunyaev-Zel'dovich effect. The template is computed from the product of a reconstructed velocity field with a galaxy field; we find that the combination of a galaxy redshift survey such as SDSS and a CMB survey such as ACT and PLANCK can detect the kSZ, and thus the ionized gas, at significant signal-to-noise. Unlike other techniques that look for hot gas or metals, this approach directly… 

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