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

Bibcode
2015PhRvL.115s1301H
DOI
10.1103/PhysRevLett.115.191301
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
Physical Review Letters
Number of authors
7
IAC number of authors
1
Citations
76
Refereed citations
69
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.
Related projects
Full-sky map showing the spatial distribution of the primary anisotropies of the Cosmic Microwave Background (generated 380,000 years after the Big Bang) derived from observations of the Planck satellite
Anisotropy of the Cosmic Microwave Background
The general goal of this project is to determine and characterize the spatial and spectral variations in the temperature and polarisation of the Cosmic Microwave Background in angular scales from several arcminutes to several degrees. The primordial matter density fluctuations which originated the structure in the matter distribution of the present
Rafael
Rebolo López
In progress
The Invisible Scaffolding of Space
Cosmology with Large Scale Structure Probes
The Cosmic Microwave Background (CMB) contains the statistical information about the early seeds of the structure formation in our Universe. Its natural counterpart in the local universe is the distribution of galaxies that arises as a result of gravitational growth of those primordial and small density fluctuations. The characterization of the
FRANCISCO SHU
KITAURA JOYANES
In progress
Type
Refereed
Cosmology & Astroparticles (CYA, CTA)
Elliptical galaxies

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