Results 271 to 280 of about 442,368 (316)

The J-PLUS collaboration. Additive versus multiplicative systematics in surveys of the large scale structure of the Universe

The Open Journal of Astrophysics
Observational and/or astrophysical systematics modulating the observed number of luminous tracers can constitute a major limitation in the cosmological exploitation of surveys of the large scale structure of the universe.
C. Hern'andez-Monteagudo, G. Arico, J. Chaves-Montero, L. Abramo, P. Arnalte-Mur, A. Hern'an-Caballero, C. L'opez-Sanjuan, V. Marra, R. V. Marttens, E. Tempel, J. Cenarro, D. Crist'obal-Hornillos, A. Mar'in-Franch, M. Moles, J. Varela, H. V. Rami'o, J. Alcañiz, R. Dupke, A. Ederoclite, L. Sodr'e, R. E. Angulo   +20 more
semanticscholar   +1 more source

Large scale structure of the universe

Space Science Reviews, 1995
The current situation with the cosmological model and fundamental constants is briefly reviewed. Here, we concentrate on evolutionary effects of large-scale structure formation, in particular, the relationship with the quasar distribution and dynamics is discussed.
openaire   +1 more source

Approximations for the divergence of the reconstructed local large-scale structure velocity field and its possible implications for cosmology

Physics of the Dark Universe, 2023
We characterize the peculiar velocity field of the local large-scale structure reconstructed from the $2M++$ survey, by treating it as a fluid, extracting the divergence via different approximations over a range pf averaged scales.
Erick Pastén, S. Gálvez, V. Cárdenas
semanticscholar   +1 more source

Large Scale Structure of the Universe

2016
The universe is full of stars. But how are all the stars distributed? Are they all huddled together, like freezing people around a fire? Or are they sprinkled evenly, as raisins in bread? The short answer is: both! The longer answer is surprisingly complex.
Benjamin Bahr, Boris Lemmer, Rina Piccolo   +2 more
openaire   +1 more source

Large-Scale Structure of the Universe

2019
By naked eye, we can easily detect only three galaxies: the Andromeda galaxy in the northern sky, and the Large and Small Magellanic Clouds in the southern sky. Pictures taken via large telescopes contain millions of galaxies, and it is estimated that there are hundreds of billions of faint galaxies all over the sky.
Pekka Teerikorpi, Mauri Valtonen, Kirsi Lehto, Harry Lehto, Gene Byrd, Arthur Chernin   +5 more
openaire   +1 more source

Detection of supernova magnitude fluctuations induced by large-scale structure

The Open Journal of Astrophysics
The peculiar velocities of supernovae and their host galaxies are correlated with the large-scale structure of the Universe, and can be used to constrain the growth rate of structure and test the cosmological model.
Andrew Nguyen, C. Blake, R. Turner, V. Aronica, J. Bautista, J. Aguilar, S. Ahlen, S. Benzvi, D. Bianchi, D. Brooks, A. Carr, T. Claybaugh, A. Cuceu, A. de la Macorra, B. Dey, P. Doel, K. Douglass, S. Ferraro, J. Forero-Romero, E. Gaztañaga, S. Gontcho, G. Gutiérrez, J. Guy, C. Howlett, K. Honscheid, D. Huterer, M. Ishak, R. Joyce, R. Kehoe, A. Kim, A. Kremin, O. Lahav, M. Landriau, L. Guillou, A. Leauthaud, M. Levi, M. Manera, P. Martini, A. Meisner, R. Miquel, E. Mueller, S. Nadathur, N. Palanque-Delabrouille, W. Percival, C. Poppett, F. Prada, F. Qin, A. Ross, C. Ross, G. Rossi, E. Sanchez, D. Schlegel, M. Schubnell, D. Sprayberry, G. Tarl'e, B. Weaver, P. Zarrouk, R. Zhou, H. Zou   +58 more
semanticscholar   +1 more source

Large-scale-structure observables in general relativity validated at second order

Journal of Cosmology and Astroparticle Physics
We present a second-order calculation of relativistic large-scale-structure observables in cosmological perturbation theory, specifically the “cosmic rulers and clock”, which are the building-blocks of any other large-scale-structure observable ...
Antoine Villey, Yonadav Barry Ginat, V. Desjacques, Donghui Jeong, Fabian Schmidt   +4 more
semanticscholar   +1 more source

Impact of light sterile neutrinos on cosmological large scale structure

Journal of Cosmology and Astroparticle Physics
Sterile neutrinos with masses on the eV scale are promising candidates to account for the origin of neutrino mass and the reactor neutrino anomalies. The mixing between sterile and active neutrinos in the early universe could result in a large abundance ...
Rui Hu, Ming-chung Chu, S. Yeung, Wangzheng Zhang   +3 more
semanticscholar   +1 more source

The large-scale structure of the Universe

European Review, 1997
The study of the distribution of matter in the Universe is at the forefront of modern astronomy, and stimulates numerous research programmes both in theory, observation and experiment. The distribution of galaxies has a cell-like structure resulting from the alternation of sheets and voids with the topological properties of a ‘sponge’.
openaire   +2 more sources

Spherical simulations of large‐scale structure of the Universe

Astronomische Nachrichten, 1985
AbstractWe consider a spherical‐smmetric perturbation in an initially homogeneous dust filled universe within the frame‐work of the Bondi‐Tolman solution. The decoupling of the perturbed region from the background evolution naturally leads to shell‐crossing in a certain outer environment, which describes energy relaxation.
openaire   +1 more source