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Research

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Publication details for Dr Wenting Wang

Hernández-Monteagudo, Carlos, Ma, Yin-Zhe, Kitaura, Francisco S., Wang, Wenting, Génova-Santos, Ricardo, Macías-Pérez, Juan & Herranz, Diego (2015). Evidence of the Missing Baryons from the Kinematic Sunyaev-Zeldovich Effect in Planck Data. Physical Review Letters 115(19): 191301.

Author(s) from Durham

Abstract

We estimate the amount of the missing baryons detected by the Planck measurements of the cosmic
microwave background in the direction of central galaxies (CGs) identified in the Sloan galaxy survey. The
peculiar motion of the gas inside and around the CGs unveils values of the Thomson optical depth τT in the
range 0.2–2 × 10−4, indicating that the regions probed around CGs contain roughly half of the total amount
of baryons in the Universe at the epoch where the CGs are found. If baryons follow dark matter, the
measured τT’s are compatible with the detection of all of the baryons existing inside and around the CGs.