Evidence of the Missing Baryons from the Kinematic Sunyaev-Zeldovich Effect in Planck Data

Hernández-Monteagudo, Carlos; Ma, Yin-Zhe; Kitaura, Francisco S.; Wang, Wenting; Génova-Santos, Ricardo; Macías-Pérez, Juan; Herranz, Diego

doi:10.1103/physrevlett.115.191301

Evidence of the Missing Baryons from the Kinematic Sunyaev-Zeldovich Effect in Planck Data

Hernández-Monteagudo, Carlos; Ma, Yin-Zhe; Kitaura, Francisco S.; Wang, Wenting; Génova-Santos, Ricardo; Macías-Pérez, Juan; Herranz, Diego

Authors

Carlos Hernández-Monteagudo

Yin-Zhe Ma

Francisco S. Kitaura

Wenting Wang

Ricardo Génova-Santos

Juan Macías-Pérez

Diego Herranz

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.

Citation

Hernández-Monteagudo, C., Ma, Y., Kitaura, F. S., Wang, W., Génova-Santos, R., Macías-Pérez, J., & Herranz, D. (2015). Evidence of the Missing Baryons from the Kinematic Sunyaev-Zeldovich Effect in Planck Data. Physical Review Letters, 115(19), Article 191301. https://doi.org/10.1103/physrevlett.115.191301

Journal Article Type	Article
Online Publication Date	Nov 3, 2015
Publication Date	Nov 3, 2015
Deposit Date	Feb 9, 2016
Publicly Available Date	Jul 28, 2016
Journal	Physical Review Letters
Print ISSN	0031-9007
Electronic ISSN	1079-7114
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	115
Issue	19
Article Number	191301
DOI	https://doi.org/10.1103/physrevlett.115.191301

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