scholarly journals Probing hot gas around luminous red galaxies through the Sunyaev–Zel’dovich effect

2019 ◽  
Vol 491 (2) ◽  
pp. 2318-2329 ◽  
Author(s):  
Hideki Tanimura ◽  
Gary Hinshaw ◽  
Ian G McCarthy ◽  
Ludovic Van Waerbeke ◽  
Nabila Aghanim ◽  
...  
Keyword(s):  
Galactic Nuclei ◽  
Pressure Profile ◽  
Sloan Digital Sky Survey ◽  
Luminous Red Galaxies ◽  
Sky Survey ◽  
Sunyaev Zel'dovich Effect ◽  
Measured Profile ◽  
Hydrodynamical Simulations ◽  
Halo Masses ◽  
Red Galaxies

ABSTRACT We construct the mean thermal Sunyaev–Zel’dovich (tSZ) Comptonization y-profile around luminous red galaxies (LRGs) in the redshift range 0.16 < z < 0.47 from the Sloan Digital Sky Survey Data Release 7 using the Planck y-map. We detect a significant tSZ signal out to ∼30 arcmin, which is well beyond the 10 arcmin angular resolution of the y-map and well beyond the virial radii of the LRGs. We compare the measured profile with predictions from the cosmo-OWLS suite of cosmological hydrodynamical simulations. The best agreement is obtained for models that include efficient feedback from active galactic nuclei, over and above feedback associated with star formation. We also compare our results with predictions based on the halo model with a universal pressure profile giving the y-signal. The predicted profile is consistent with the data when using stacked weak lensing measurements to estimate the halo masses of the LRGs, but only if we account for the clustering of neighbouring haloes via a two-halo term.

scholarly journals The three-point correlation function of luminous red galaxies in the Sloan Digital Sky Survey

2007 ◽  
Vol 378 (3) ◽  
pp. 1196-1206 ◽  
Author(s):  
Gauri V. Kulkarni ◽  
Robert C. Nichol ◽  
Ravi K. Sheth ◽  
Hee-Jong Seo ◽  
Daniel J. Eisenstein ◽  
...  
Keyword(s):  
Correlation Function ◽  
Sloan Digital Sky Survey ◽  
Luminous Red Galaxies ◽  
Sky Survey ◽  
Point Correlation ◽  
Point Correlation Function ◽  
Red Galaxies

scholarly journals Studying Luminous Red Galaxies to probe H(z) at high redshift

2012 ◽  
Vol 8 (S295) ◽  
pp. 185-185
Author(s):  
A. Ratsimbazafy ◽  
C. Cress ◽  
S. Crawford ◽  
Keyword(s):  
High Redshift ◽  
Sloan Digital Sky Survey ◽  
Age Dating ◽  
Time Interval ◽  
Spectral Fitting ◽  
Luminous Red Galaxies ◽  
Sky Survey ◽  
Intense Burst ◽  
Red Galaxies ◽  
The Universe

AbstractLuminous Red Galaxies (LRGs) have old, red stellar populations often interpreted as evidence of a formation scenario in which these galaxies form in a single intense burst of star formation at high redshift. By measuring the average age of LRGs at two different redshifts, one can potentially measure the redshift interval corresponding to a time interval and thus measure the Hubble parameter H(z) ≈ −(1 + z)−1 Δ z/Δt (as in Jimenez & Loeb). The goal of this project is to measure directly the expansion rate of the universe at the redshift range 0.1 < z < 1.0 within 3% precision. We explore the age-dating of Sloan Digital Sky Survey LRGs using the stellar population models of Lick absorption line indices after stacking spectra in redshift bins to increase the signal-to-noise. We also use the method of full spectral fitting to measure the ages of LRGs observed with the Southern Africa Large Telescope (SALT).

scholarly journals Erratum: Cosmological constraints from the clustering of the Sloan Digital Sky Survey DR7 luminous red galaxies

2011 ◽  
Vol 417 (4) ◽  
pp. 3103-3104 ◽  
Author(s):  
◽  
Beth A. Reid ◽  
Will J. Percival ◽  
Daniel J. Eisenstein ◽  
Licia Verde ◽  
...  
Keyword(s):  
Sloan Digital Sky Survey ◽  
Cosmological Constraints ◽  
Luminous Red Galaxies ◽  
Sky Survey ◽  
Red Galaxies

scholarly journals A gravitational lensing detection of filamentary structures connecting luminous red galaxies

2020 ◽  
Vol 633 ◽  
pp. A89 ◽  
Author(s):  
Qianli Xia ◽  
Naomi Robertson ◽  
Catherine Heymans ◽  
Alexandra Amon ◽  
Marika Asgari ◽  
...  
Keyword(s):  
Gravitational Lensing ◽  
Critical Density ◽  
Average Density ◽  
Sloan Digital Sky Survey ◽  
Weak Lensing ◽  
Luminous Red Galaxies ◽  
Sky Survey ◽  
Combining Data ◽  
Red Galaxies ◽  
Cluster Sequence

We present a weak lensing detection of filamentary structures in the cosmic web, combining data from the Kilo-Degree Survey, the Red Cluster Sequence Lensing Survey, and the Canada-France-Hawaii Telescope Lensing Survey. The line connecting luminous red galaxies with a separation of 3 − 5 h−1 Mpc was chosen as a proxy for the location of filaments. We measured the average weak lensing shear around ∼11 000 candidate filaments selected in this way from the Sloan Digital Sky Survey. After nulling the shear induced by the dark matter haloes around each galaxy, we reported a 3.4σ detection of an anisotropic shear signal from the matter that connects them. Adopting a filament density profile, motivated from N-body simulations, the average density at the centre of these filamentary structures was found to be 15 ± 4 times the critical density.

scholarly journals TOPOLOGY OF LUMINOUS RED GALAXIES FROM THE SLOAN DIGITAL SKY SURVEY

2013 ◽  
Vol 209 (2) ◽  
pp. 19 ◽  
Author(s):  
Yun-Young Choi ◽  
Juhan Kim ◽  
Graziano Rossi ◽  
Sungsoo S. Kim ◽  
Jeong-Eun Lee
Keyword(s):  
Sloan Digital Sky Survey ◽  
Luminous Red Galaxies ◽  
Sky Survey ◽  
Red Galaxies
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