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

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
• Public URL: https://durham-repository.worktribe.com/output/1389241