Results 41 to 50 of about 430,581 (306)

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

Prospects for 21 cm Galaxy Cross-correlations with HERA and the Roman High-latitude Survey

The Astrophysical Journal, 2023
The cross-correlation between the 21 cm field and the galaxy distribution is a potential probe of the Epoch of Reionization (EoR). The 21 cm signal traces neutral gas in the intergalactic medium and, on large spatial scales, this should be anticorrelated
Paul La Plante, Jordan Mirocha, Adélie Gorce, Adam Lidz, Aaron Parsons   +4 more
doaj   +1 more source

Large-scale Filamentary Structure around the Protocluster at Redshift z=3.1 [PDF]

, 2005
We report the discovery of a large-scale coherent filamentary structure of Lyman alpha emitters in a redshift space at z=3.1. We carried out spectroscopic observations to map the three dimensional structure of the belt-like feature of the Lyman alpha ...
Hajime Tamura, Kashikawa N., Kazuhiro Shimasaku, Kouji Ohta, Masami Ouchi, Miyazaki S., Ryosuke Yamauchi, Sadanori Okamura, Takashi Murayama, Tohru Nagao, Tomoki Hayashino, Toru Yamada, Yasuhiro Shioya, Yoshiaki Taniguchi, Yuichi Matsuda   +14 more
core   +2 more sources

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

Cosmological Shock Waves in the Large Scale Structure of the Universe: Non-gravitational Effects [PDF]

, 2007
Cosmological shock waves result from supersonic flow motions induced by hierarchical clustering of nonlinear structures in the universe. These shocks govern the nature of cosmic plasma through thermalization of gas and acceleration of nonthermal, cosmic ...
Cen, Renyue, Kang, Hyesung, Ostriker, J. P., Ryu, Dongsu   +3 more
core   +2 more sources

Large scale structure and the generalised Chaplygin gas as dark energy [PDF]

, 2003
The growth of large scale structure is studied in a universe containing both cold dark matter (CDM) and generalized Chaplygin gas (GCg). GCg is assumed to contribute only to the background evolution of the universe while the CDM component collapses and ...
A. Dev, A. G. Riess, A. Kamenshchik, A. Sen, D. Carturan, D. N. Spergel, E. Gaztañaga, Enrique Gaztañaga, F. Bernardeau, G. Dvali, G. W. Gibbons, J. Alcaniz, J. C. Fabris, J. C. Fabris, K. Benabed, K. Freese, L. Amendola, L. M. G. Beca, M. Bento, M. Bento, M. Bento, M. Makler, Marc Manera, N. Bilic, P. Fosalba, P. J. E. Peebles, P. J. E. Peebles, P. P. Avelino, R. Bean, R. Crittenden, R. K. Sachs, R. R. Caldwell, R. Reis, S. Perlmutter, T. Multamäki, Tuomas Multamäki   +35 more
core   +1 more source

The Aemulus Project. V. Cosmological Constraint from Small-scale Clustering of BOSS Galaxies

The Astrophysical Journal, 2023
We analyze clustering measurements of BOSS galaxies using a simulation-based emulator of two-point statistics. We focus on the monopole and quadrupole of the redshift-space correlation function, and the projected correlation function, at scales of 0.1 ...
Zhongxu Zhai, Jeremy L. Tinker, Arka Banerjee, Joseph DeRose, Hong Guo, Yao-Yuan Mao, Sean McLaughlin, Kate Storey-Fisher, Risa H. Wechsler   +8 more
doaj   +1 more source

Automated detection of filaments in the large scale structure of the universe

, 2010
We present a new method to identify large scale filaments and apply it to a cosmological simulation. Using positions of haloes above a given mass as node tracers, we look for filaments between them using the positions and masses of all the remaining dark-
Aragón-Calvo, Aragón-Calvo, Avila-Reese, Barrow, Bharadwaj, Bharadwaj, Biggs, Bond, Bond, Bullock, Colberg, Colberg, Colless, Davis, Diaferio, Dietrich, Einasto, Eriksen, Finlator, Gao, González, Knollmann, Martínez, Mead, Navarro, Nelson D. Padilla, Novikov, Padilla, Pelupessy, Pimbblet, Pimbblet, Pivato, Porter, Roberto E. González, Sahni, Scharf, Shaap, Shandarin, Sousbie, Stoica, Stoica, Stoughton, Tittley, Voronoi, York, Zel'dovich, Zel'dovich, Zhang   +47 more
core   +1 more source

Fuzzy Dark Matter as a Solution to Reconcile the Stellar Mass Density of High-z Massive Galaxies and Reionization History

The Astrophysical Journal, 2023
The JWST early release data show unexpected high stellar mass densities of massive galaxies at 7 < z < 11. A high star formation efficiency is probably needed to explain this.
Yan Gong, Bin Yue, Ye Cao, Xuelei Chen
doaj   +1 more source

Mapping the Large-Scale Structure of the Universe

Science, 2005
In a large scale view of the universe, galaxies are the basic unit of structure. A typical bright galaxy may contain 100 billion stars and span tens of thousands of light years, but the empty expanses between the galaxies are much larger still. Galaxies are not randomly distributed in space, but instead reside in groups and clusters, which are ...
openaire   +2 more sources