Bibcode
Hernández-Monteagudo, C.; Ma, Yin-Zhe; Kitaura, Francisco S.; Wang, Wenting; Génova-Santos, R.; Macías-Pérez, Juan; Herranz, Diego
Bibliographical reference
Physical Review Letters, Volume 115, Issue 19, id.191301
Advertised on:
11
2015
Journal
Citations
77
Refereed citations
70
Description
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
×1 0-4 , 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.
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