Results 31 to 40 of about 430,537 (306)

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

Cosmic voids and the kinetic analysis

Astronomy & Astrophysics
We study the appearance and specific properties of the structures in the local Universe by means of the Vlasov kinetic technique. We consider the role of the cosmological constant in local structure formation via the theorem on the general function that ...
Gurzadyan V. G., Fimin N. N., Chechetkin V. M.   +2 more
doaj   +1 more source

Constraining cosmological ultra-large scale structure using numerical relativity [PDF]

, 2017
Cosmic inflation, a period of accelerated expansion in the early universe, can give rise to large amplitude ultra-large scale inhomogeneities on distance scales comparable to or larger than the observable universe.
Aguirre, Anthony, Braden, Jonathan, Johnson, Matthew C., Peiris, Hiranya V.   +3 more
core   +2 more sources

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

Primordial non-Gaussianity in the large scale structure of the Universe [PDF]

, 2010
Primordial non-Gaussianity is a potentially powerful discriminant of the physical mechanisms that generated the cosmological fluctuations observed today.
Desjacques, Vincent, Seljak, Uros
core   +4 more sources

Consistency test of general relativity from large scale structure of the Universe [PDF]

, 2009
We construct a consistency test of General Relativity (GR) on cosmological scales. This test enables us to distinguish between the two alternatives to explain the late-time accelerated expansion of the universe, that is, dark energy models based on GR ...
, , A.J.S. Hamilton, B. Jain, E. Bertschinger, H.J. Mo, K. Koyama, K. Koyama, Kazuya Koyama, L. Amendola, M. White, N. Kaiser, S. Capozziello, S. Matarrese, S. Nojiri, Supernova Cosmology Project collaboration, Supernova Search Team collaboration, Y.-S. Song, Y.-S. Song, Y.-S. Song, Yong-Seon Song   +20 more
core   +2 more sources

The Time Evolution of Mutual Information between Disjoint Regions in the Universe

Entropy, 2023
We study the time evolution of mutual information between mass distributions in spatially separated but casually connected regions in an expanding universe.
Biswajit Pandey
doaj   +1 more source

Regularity of the Large-Scale Structure of the Universe [PDF]

Symposium - International Astronomical Union, 1999
The observed structure of the Universe is hierarchical. Galaxies and clusters of galaxies are concentrated within elongated filamentary chains of various richness. High-density regions of the Universe form superclusters consisting of one or several clusters of galaxies and chains of galaxies surrounding and joining clusters. The space between filaments
openaire   +3 more sources

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

Neutrinos and Cosmology: an update [PDF]

, 2005
We review the current cosmological status of neutrinos, with particular emphasis on their effects on Big Bang Nucleosynthesis, Large Scale Structure of the universe and Cosmic Microwave Background Radiation measurements.Comment: 4 pages, 1 figure, to ...
Pisanti, Ofelia, Serpico, P. D.
core   +2 more sources