Publications (41)
Cosmological parameters from observational data on the large scale structure of the Universe
B. Novosyadlyj, R. Durrer, S. Apunevych
The observational data on the large scale structure (LSS) of the Universe are used to determine cosmological parameters within the class of adiabatic inflationary models. We show t…
Spectral Distortions of the CMB as a Probe of Inflation, Recombination, Structure Formation and Particle Physics
J. Chluba, A. Kogut, S. P. Patil +98
Following the pioneering observations with COBE in the early 1990s, studies of the cosmic microwave background (CMB) have focused on temperature and polarization anisotropies. CMB…
Exploring Cosmic Origins with CORE: Survey requirements and mission design
J. Delabrouille, P. de Bernardis, F. R. Bouchet +200
Future observations of cosmic microwave background (CMB) polarisation have the potential to answer some of the most fundamental questions of modern physics and cosmology. In this p…
Constraining the dynamical dark energy parameters: Planck-2013 vs WMAP9
B. Novosyadlyj, O. Sergijenko, R. Durrer +1
We determine the best-fit values and confidence limits for dynamical dark energy parameters together with other cosmological parameters on the basis of different datasets which inc…
Backreaction from gauge fields produced during inflation
R. Durrer, O. Sobol, S. Vilchinskii
In this work, we study general features of a regime where gauge fields produced during inflation cause a strong backreaction on the background evolution and its impact on the spect…
Acoustic peaks and dips in the CMB power spectrum: observational data and cosmological constraints
R. Durrer, B. Novosyadlyj, S. Apunevych
The locations and amplitudes of three acoustic peaks and two dips in the last releases of the Boomerang, MAXIMA and DASI measurements of the cosmic microwave background (CMB) aniso…
The cosmological constant and general isocurvature initial conditions
R. Trotta, A. Riazuelo, R. Durrer
We investigate in detail the question whether a non-vanishing cosmological constant is required by present-day cosmic microwave background and large scale structure data when gener…
An analytic approximation of MDM power spectra in four dimensional parameter space
B. Novosyadlyj, R. Durrer, V. N. Lukash
An accurate analytic approximation of the transfer function for the power spectra of primordial density perturbations in mixed dark matter models is presented. The fitting formula…
Adiabatic perturbations in pre big bang models: matching conditions and scale invariance
R. Durrer, F. Vernizzi
At low energy, the four-dimensional effective action of the ekpyrotic model of the universe is equivalent to a slightly modified version of the pre big bang model. We discuss cosmo…
Cosmological parameters from large scale structure observations
B. Novosyadlyj, R. Durrer, S. Gottloeber +2
The possibility of determining cosmological parameters on the basis of a wide set of observational data including the Abell-ACO cluster power spectrum and mass function, peculiar v…
Seeds of large-scale anisotropy in string cosmology
R. Durrer, M. Gasperini, M. Sakellariadou +1
Pre-big bang cosmology predicts tiny first-order dilaton and metric perturbations at very large scales. Here we discuss the possibility that other -- more copiously generated -- pe…
Cosmic Microwave Background anisotropies and extra dimensions in String Cosmology
A. Melchiorri, F. Vernizzi, R. Durrer +1
A recently proposed mechanism for large-scale structure in string cosmology --based on massless axionic seeds-- is further analyzed and extended to the acoustic-peak region. Existe…
Particle Creation in Pre-Big-Bang Cosmology: theory and observational consequences
R. Durrer, K. E. Kunze, M. Sakellariadou
We present some phenomenological aspects of the pre-big-bang cosmological model inspired by the duality properties of string theory. In particular, assuming the spatial sections of…
Reproducing the observed Cosmic microwave background anisotropies with causal scaling seeds
R. Durrer, M. Kunz, A. Melchiorri
During the last years it has become clear that global O(N) defects and U(1) cosmic strings do not lead to the pronounced first acoustic peak in the power spectrum of anisotropies o…
Testing the paradigm of adiabaticity
R. Trotta, R. Durrer
We introduce the concepts of adiabatic (curvature) and isocurvature (entropy) cosmological perturbations and present their relevance for parameter estimation from cosmic microwave…
Euclid preparation. XCVIII. Cosmology Likelihood for Observables in Euclid (CLOE). 5: Extensions beyond the standard modelling of theoretical probes and systematic effects
Euclid Collaboration, L. W. K. Goh, A. Nouri-Zonoz +301
Euclid is expected to establish new state-of-the-art constraints on extensions beyond the standard LCDM cosmological model by measuring the positions and shapes of billions of gala…
Non-Gaussianities due to Relativistic Corrections to the Observed Galaxy Bispectrum
E. Di Dio, H. Perrier, R. Durrer +4
High-precision constraints on primordial non-Gaussianity (PNG) will significantly improve our understanding of the physics of the early universe. Among all the subtleties in using…
Euclid preparation: XIX. Impact of magnification on photometric galaxy clustering
F. Lepori, I. Tutusaus, C. Viglione +183
We investigate the importance of lensing magnification for estimates of galaxy clustering and its cross-correlation with shear for the photometric sample of Euclid. Using updated s…
Euclid preparation: The flat-sky approximation for the clustering of Euclid's photometric galaxies
Euclid Collaboration, W. L. Matthewson, R. Durrer +277
We compare the performance of the flat-sky approximation and Limber approximation for the clustering analysis of the photometric galaxy catalogue of Euclid. We study a 6 bin config…
Cosmological perturbations and the transition from contraction to expansion
C. Cartier, R. Durrer, E. J. Copeland
We investigate both analytically and numerically the evolution of scalar perturbations generated in models which exhibit a smooth transition from a contracting to an expanding Frie…
Determination of cosmological parameters from large scale structure observations
B. Novosyadlyj, R. Durrer, S. Gottloeber +2
The possibility of determining cosmological parameters on the basis of a wide set of observational data including the Abell-ACO cluster power spectrum and mass function, peculiar v…
Euclid preparation. Review of forecast constraints on dark energy and modified gravity
Euclid Collaboration, N. Frusciante, M. Martinelli +326
The Euclid mission has been designed to provide, as one of its main deliverables, information on the nature of the gravitational interaction, which determines the expansion of the…
Magnetogenesis in Higgs-Starobinsky inflation
R. Durrer, O. Sobol, S. Vilchinskii
In the framework of mixed Higgs-Starobinsky inflation, we consider the generation of Abelian gauge fields due to their nonminimal coupling to gravity (in two different formulations…
Prospects for Fundamental Physics with LISA
Enrico Barausse, Emanuele Berti, Thomas Hertog +318
In this paper, which is of programmatic rather than quantitative nature, we aim to further delineate and sharpen the future potential of the LISA mission in the area of fundamental…
Cosmic Microwave Background Anisotropies from Scaling Seeds: Fit to Observational Data
R. Durrer, M. Kunz, C. Lineweaver +1
We compute cosmic microwave background angular power spectra for scaling seed models of structure formation. A generic parameterization of the energy momentum tensor of the seeds i…
Microwave Anisotropies from Texture Seeded Structure Formation
R. Durrer, A. Howard, Z. -H. Zhou
The cosmic microwave anisotropies in a scenario of large scale structure formation with cold dark matter and texture are discussed and compared with recent observational results of…
Cosmological parameters from complementary observations of the Universe
R. Durrer, B. Novosyadlyj
We use observational data on the large scale structure (LSS) of the Universe measured over a wide range of scales from sub-galactic up to horizon scale and on the cosmic microwave…
Euclid. I. Overview of the Euclid mission
Euclid Collaboration, Y. Mellier, Abdurro'uf +1134
The current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. Eucl…
Scalar perturbations from inflation in the presence of gauge fields
R. Durrer, R. von Eckardstein, Deepen Garg +3
We study how Abelian-gauge-field production during inflation affects scalar perturbations in the case when the gauge field interacts with the inflaton directly (by means of generic…
Large Scale Structure Formation with Global Topological Defects. A new Formalism and its implementation by numerical simulations
R. Durrer, Z. -H. Zhou
We investigate cosmological structure formation seeded by topological defects which may form during a phase transition in the early universe. First we derive a partially new, local…
CMB anisotropies from pre-big bang cosmology
F. Vernizzi, A. Melchiorri, R. Durrer
We present an alternative scenario for cosmic structure formation where initial fluctuations are due to Kalb-Ramond axions produced during a pre-big bang phase of inflation. We inv…
Massless (pseudo-)scalar seeds of CMB anisotropy
R. Durrer, M. Gasperini, M. Sakellariadou +1
A primordial stochastic background of very weakly coupled massless (pseudo-)scalars can seed CMB anisotropy, when large-scale fluctuations of their stress-tensor re-enter the horiz…
Cosmic Structure Formation with Topological Defects
R. Durrer, M. Kunz, A. Melchiorri
Topological defects are ubiquitous in physics. Whenever a symmetry breaking phase transition occurs, topological defects may form. The best known examples are vortex lines in type…
Constraints on the tensor mode from large scale structure observations
B. Novosyadlyj, R. Durrer, S. Apunevych
Observational data on the large scale structure (LSS) of the Universe are used to establish an upper limit for the amplitude of the tensor mode marginalized over all other cosmolog…
Constraints on the neutrino mass and the cosmological constant from large scale structure observations
B. Novosyadlyj, R. Durrer, S. Apunevych
The observational data on the large scale structure (LSS) of the Universe are used to establish the upper limit on the neutrino content marginalized over all other cosmological par…
A new Contribution to Cosmological Perturbations of some Inflationary Models
R. Durrer, M. Sakellariadou
We show that there are inflationary models for which perturbations in the energy momentum tensor, which are of second order in the scalar field, cannot be neglected. We first speci…
Tensor Microwave Anisotropies from a Stochastic Magnetic Field
R. Durrer, P. G. Ferreira, T. Kahniashvili
We derive an expression for the angular power spectrum of cosmic microwave background anisotropies due to gravity waves generated by a stochastic magnetic field and compare the res…
Quintessence versus phantom dark energy: the arbitrating power of current and future observations
B. Novosyadlyj, O. Sergijenko, R. Durrer +1
We analyze the possibility to distinguish between quintessence and phantom scalar field models of dark energy using observations of luminosity distance moduli of SNe Ia, CMB anisot…
Euclid Preparation. TBD. Impact of magnification on spectroscopic galaxy clustering
Euclid Collaboration, G. Jelic-Cizmek, F. Sorrenti +226
In this paper we investigate the impact of lensing magnification on the analysis of Euclid's spectroscopic survey, using the multipoles of the 2-point correlation function for gala…
Cosmological Magnetic Fields: Their Generation, Evolution and Observation
R. Durrer, A. Neronov
We review the possible mechanisms for the generation of cosmological magnetic fields, discuss their evolution in an expanding Universe filled with the cosmic plasma and provide a c…
Reproducing Cosmic Microwave Background anisotropies with mixed isocurvature perturbations
R. Trotta, A. Riazuelo, R. Durrer
Recently high quality data of the cosmic microwave background anisotropies have been published. In this work we study to which extent the cosmological parameters determined by usin…