Results 51 to 60 of about 424,562 (307)

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

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

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

Population Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Cosmological Information in the Marked Power Spectrum of the Galaxy Field

The Astrophysical Journal, 2023
Marked power spectra are two-point statistics of a marked field obtained by weighting each location with a function that depends on the local density around that point. We consider marked power spectra of the galaxy field in redshift space that up-weight
Elena Massara, Francisco Villaescusa-Navarro, ChangHoon Hahn, Muntazir M. Abidi, Michael Eickenberg, Shirley Ho, Pablo Lemos, Azadeh Moradinezhad Dizgah, Bruno Régaldo-Saint Blancard   +8 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

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

Cross Correlation between the Thermal Sunyaev–Zeldovich Effect and the Integrated Sachs–Wolfe Effect

The Astrophysical Journal Supplement Series
We present a joint cosmological analysis of the power spectra measurement of the Planck Compton parameter and the integrated Sachs–Wolfe (ISW) maps. We detect the statistical correlation between the Planck thermal Sunyaev–Zeldovich (tSZ) map and ISW data
Ayodeji Ibitoye, Wei-Ming Dai, Yin-Zhe Ma, Patricio Vielva, Denis Tramonte, Amare Abebe, Aroonkumar Beesham, Xuelei Chen   +7 more
doaj   +1 more source

One-Point Statistics Matter in Extended Cosmologies

Universe, 2022
The late universe contains a wealth of information about fundamental physics and gravity, wrapped up in non-Gaussian fields. To make use of as much information as possible, it is necessary to go beyond two-point statistics.
Alex Gough, Cora Uhlemann
doaj   +1 more source

Dark Energy and Large-Scale Structure of the Universe [PDF]

, 2004
The evolution of matter density perturbations in two-component model of the Universe consisting of dark energy (DE) and dust-like matter (M) is considered.
Kulinich, Yu., Novosyadlyj, B.
core   +1 more source

Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders

Population Ecology, EarlyView.
We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa, Andrea Costa, Sebastiano Salvidio   +2 more
wiley   +1 more source