Results 11 to 20 of about 60,808,388 (219)

Cosmological parameters from large scale structure observations

, 1999
19 pages, 9 figures.
Novosyadlyj, B., Durrer, Ruth, Gottloeber, S., Lukash, V. N., Apunevych, S.   +4 more
openaire   +4 more sources

Ultralarge-scale approximations and galaxy clustering: Debiasing constraints on cosmological parameters [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
International audienceUpcoming galaxy surveys will allow us to probe the growth of the cosmic large-scale structure with improved sensitivity compared to current missions, and will also map larger areas of the sky.
Yashar Akrami, Matteo Martinelli, Stefano Camera   +2 more
exaly   +2 more sources

The CLASSgal code for relativistic cosmological large scale structure

Journal of Cosmology and Astroparticle Physics, 2013
We present some accurate and efficient computations of large scale structure observables, obtained with a modified version of the CLASS code which is made publicly available.
Ruth Durrer, Francesco Montanari
exaly   +2 more sources

Unified Dark Matter models with fast transition [PDF]

, 2010
We investigate the general properties of Unified Dark Matter (UDM) fluid models where the pressure and the energy density are linked by a barotropic equation of state (EoS) p = p(ρ) and the perturbations are adiabatic.
Davide Pietrobon, Bruni, Marco, Bertacca, Daniele, Oliver F Piattella, Piattella, Oliver F., Piattella, O., Pietrobon, Davide, D. PIETROBON, Marco Bruni, PIATTELLA O, D. BERTACCA, M. BRUNI, Daniele Bertacca   +12 more
core   +5 more sources

Effects of cosmological model assumptions on galaxy redshift survey measurements [PDF]

, 2010
The clustering of galaxies observed in future redshift surveys will provide a wealth of cosmological information. Matching the signal at different redshifts constrains the dark energy driving the acceleration of the expansion of the Universe.
Cimatti, A., Samushia, Lado, James E. Geach, Geach, J.E., Percival, W.J., Orsi, A., Lacey, Cedric, Orsi, Alvaro, Baugh, Carlton M., Luigi Guzzo, Samushia, L., Guzzo, L., Guzzo, Luigi, Cedric Lacey, Lado Samushia, Percival, Will J., Baugh, C., Mukherjee, P., Pia Mukherjee, Majerotto, Elisabetta, Geach, James E., Cimatti, Andrea, Lacey, C., Andrea Cimatti, Alvaro Orsi, Mukherjee, Pia, Yun Wang, Will J. Percival, Majerotto, E., Baugh, Carlton, Carlton Baugh, Wang, Yun, Wang, Y., Elisabetta Majerotto, Wang Yun, Baugh Carlton, Samushia Lado, Percival Will J., Mukherjee Pia, Majerotto Elisabetta, Orsi Alvaro, Geach James E., Guzzo Luigi, Lacey Cedric   +43 more
core   +1 more source

Primordial black holes in non-linear perturbation theory [PDF]

, 2009
PhDThe thesis begins with a study of the origin of non-linear cosmological fluctuations. In particular, a class of models of multiple field inflation are considered, with specific reference to those cases in which the non-Gaussian correlation functions
Hidalgo-Cuellar, Juan Carlos
core   +2 more sources

Dark Matter Cosmology with Varying Viscosity: A Possible Resolution to the S 8 Tension

The Astrophysical Journal, 2023
We study varying forms of viscous dark matter (DM) and try to address the intriguing tensions of the standard model of cosmology with recent cosmological data, including the Hubble and S _8 tensions.
Amjad Ashoorioon, Zahra Davari
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

Cosmological constraints from large-scale structure growth rate measurements [PDF]

, 2014
We compile a list of 14 independent measurements of a large-scale structure growth rate between redshifts 0.067≤z≤0.8 and use this to place constraints on model parameters of constant and time-evolving general-relativistic dark energy cosmologies.
Farooq, Omer, Ratra, Bharat V., Pavlov, Anatoly   +2 more
core   +1 more source

Supersymmetric small-field inflation with tribrid superpotentials [PDF]

, 2016
In this thesis, we study supersymmetric models of tribrid inflation and new inflation, both of which can be realized with a tribrid superpotential. In the first part, we focus on tribrid inflation, deriving relations between cosmological observables ...
Nolde, David
core   +1 more source