Results 31 to 40 of about 432,951 (281)

CMBPol Mission Concept Study: Gravitational Lensing [PDF]

, 2008
Gravitational lensing of the cosmic microwave background by large-scale structure in the late universe is both a source of cosmological information and a potential contaminant of primordial gravity waves.
Alan Kogut, Asantha Cooray, Asantha Cooray, Aurelien Fraisse, Brian Keating, Chris Hirata, Daniel Baumann, Duncan Hanson, Graça Rocha, Joanna Dunkley, Kendrick M. Smith, Kendrick Smith, Lawrence Krauss, Manoj Kaplinghat, Marilena LoVerde, Mark G. Jackson, Matias Zaldarriaga, Meir Shimon, Nathan Miller, Oliver Zahn, Olivier Doré, Scott Dodelson, Sudeep Das   +22 more
core   +3 more sources

HI as a Probe of the Large Scale Structure in the Post-Reionization Universe [PDF]

, 2010
We model the distribution of neutral Hydrogen (HI hereafter) in the post-reionization universe. This model uses gravity only N-Body simulations and an ansatz to assign HI to dark matter haloes that is consistent with observational constraints and ...
Ali, Bagla, Bagla, Bagla, Bagla, Bagla, Bagla, Bagla, Bagla, Bagla, Bagla, Baugh, Becker, Benson, Bernardeau, Bharadwaj, Bharadwaj, Bharadwaj, Bharadwaj, Bharadwaj, Bharadwaj, Binney, Bromm, Chang, Chengalur, Datta, Datta, Davis, Dekel, Fan, Fan, Field, Field, Fry, Furlanetto, Furlanetto, Furlanetto, Gardner, Gelb, Haehnelt, Hoyle, J. S. Bagla, Kaiser, Kanan K. Datta, Kanekar, Khandai, Komatsu, Kumar, Lah, Lah, Loeb, Loeb, Magliocchetti, McEwen, McKee, McQuinn, Mo, Mo, Ng, Ng, Nishikanta Khandai, Padmanabhan, Peacock, Peebles, Pontzen, Pritchard, Purcell, Péroux, Rao, Rees, Roukema, Roukema, Scott, Shandarin, Sheth, Silk, Storrie-Lombardi, Subramanian, Sunyaev, Sunyaev, Thompson, Trimble, Visbal, Wolfe, Wouthuysen, Wouthuysen, Wyithe, Zinnecker, Zwaan, Zygelman   +89 more
core   +1 more source

The Line-of-Sight Analysis of Spatial Distribution of Galaxies in the COSMOS2015 Catalogue

Universe, 2020
New observations of high-redshift objects are crucial for the improvement of the standard ΛCDM cosmological model and our understanding of the Universe.
Maxim Nikonov, Mikhail Chekal, Stanislav Shirokov, Andrey Baryshev, Vladimir Gorokhov   +4 more
doaj   +1 more source

First Constraints on Growth Rate from Redshift-space Ellipticity Correlations of SDSS Galaxies at 0.16 < z < 0.70

The Astrophysical Journal Letters, 2023
We report the first constraints on the growth rate of the universe, f ( z ) σ _8 ( z ), with intrinsic alignments (IAs) of galaxies. We measure the galaxy density-intrinsic ellipticity cross-correlation and intrinsic ellipticity autocorrelation functions
Teppei Okumura, Atsushi Taruya
doaj   +1 more source

No very large scale structure in an open universe

Physical Review D, 1995
We study the effects of negative spatial curvature on the statistics of inhomogeneities in open cosmological models. In particular we examine the suppression of large-separation correlations in density and gravitational potential fluctuations and the resulting suppression of large-angle correlations in the anisotropy of the microwave background ...
Stebbins, Albert, Caldwell, R. R.
openaire   +3 more sources

Tomographic Alcock–Paczyński Test with Redshift-space Correlation Function: Evidence for the Dark Energy Equation-of-state Parameter w > −1

The Astrophysical Journal, 2023
The apparent shape of galaxy clustering depends on the adopted cosmology used to convert observed redshift to comoving distance, the r ( z ) relation, as it changes the line elements along and across the line of sight differently.
Fuyu Dong, Changbom Park, Sungwook E. Hong, Juhan Kim, Ho Seong Hwang, Hyunbae Park, Stephen Appleby   +6 more
doaj   +1 more source

Large–scale structure and matter in the Universe

Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2003
17 Pages. Review paper from the January 2003 Royal Society Discussion Meeting, "The search for dark matter and dark energy in the universe"
openaire   +3 more sources

Quasars and large scale structure of the universe [PDF]

, 2008
The majority of bright distant quasars $(z {}^{>}_{\sim} 1)$ may form in massive mergers appearing in compact galaxy groups in/and young clusters. The expected tests are (i) large correlation signal for medium-$z$ QSOs $(1 < z < 2)$ and (ii) direct search for quasar groups (QGs) indicating positions of distant pre-superclusters which later ...
openaire   +2 more sources

Turbulence and Magnetic Fields in the Large Scale Structure of the Universe

, 2008
The nature and origin of turbulence and magnetic fields in the intergalactic space are important problems that are yet to be understood. We propose a scenario in which turbulent flow motions are induced via the cascade of the vorticity generated at ...
Cho, Jungyeon, Das, Santabrata, Kang, Hyesung, Ryu, Dongsu   +3 more
core   +1 more source

Observed Evidence for the Primordial Origin of Galaxy Sizes

The Astrophysical Journal
We present observational evidence supporting the scenario that the protogalactic angular momenta play an important role in molding the optical sizes of present galaxies. Analyzing the NASA-Sloan Atlas catalog in the redshift range of 0.02 ≤ z  
Jun-Sung Moon, Jounghun Lee
doaj   +1 more source