SIMBAD references

2020A&A...637A..41T - Astronomy and Astrophysics, volume 637A, 41-41 (2020/5-1)

Density and temperature of cosmic-web filaments on scales of tens of megaparsecs.

TANIMURA H., AGHANIM N., BONJEAN V., MALAVASI N. and DOUSPIS M.

Abstract (from CDS):

We studied physical properties of matter in 24 544 filaments ranging from 30 to 100 Mpc in length, identified in the Sloan Digital Sky Survey. We stacked the Comptonization y map produced by the Planck Collaboration around the filaments, excluding the resolved galaxy groups and clusters above a mass of ∼3x1013M. We detected the thermal Sunyaev-Zel'dovich signal for the first time at a significance of 4.4σ in filamentary structures on such a large scale. We also stacked the Planck cosmic microwave background lensing convergence map in the same manner and detected the lensing signal at a significance of 8.1σ. To estimate physical properties of the matter, we considered an isothermal cylindrical filament model with a density distribution following a β-model (β = 2/3). Assuming that the gas distribution follows the dark matter distribution, we estimate that the central gas and matter overdensity δ and gas temperature Te are δ=19.0–12.1+27.3 and Te=1.4–0.4+0.4x106K, which results in a measured baryon fraction of 0.080–0.051+0.116b.

Abstract Copyright: © H. Tanimura et al. 2020

Journal keyword(s): cosmology: observations - large-scale structure of Universe

Simbad objects: 9

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2022.12.06-19:32:00

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