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Spherical collapse in Generalized Dark Matter models
F. Pace, Z. Sakr, I. Tutusaus
The influence of considering a generalized dark matter (GDM) model, which allows for a non-pressure-less dark matter and a non-vanishing sound speed in the non-linear spherical col…
Euclid: The reduced shear approximation and magnification bias for Stage IV cosmic shear experiments
A. C. Deshpande, T. D. Kitching, V. F. Cardone +69
Stage IV weak lensing experiments will offer more than an order of magnitude leap in precision. We must therefore ensure that our analyses remain accurate in this new era. Accordin…
Euclid preparation: VI. Verifying the Performance of Cosmic Shear Experiments
Euclid Collaboration, P. Paykari, T. D. Kitching +128
Our aim is to quantify the impact of systematic effects on the inference of cosmological parameters from cosmic shear. We present an end-to-end approach that introduces sources of…
Euclid preparation: VII. Forecast validation for Euclid cosmological probes
Euclid Collaboration, A. Blanchard, S. Camera +151
The Euclid space telescope will measure the shapes and redshifts of galaxies to reconstruct the expansion history of the Universe and the growth of cosmic structures. Estimation of…
Time-dependent in Einstein's equations as an alternative to the cosmological constant
Ekim Taylan Hanımeli, Brahim Lamine, Alain Blanchard +1
In this work, we investigate cosmologies where the gravitational constant varies in time, with the aim of explaining the accelerated expansion without a cosmological constant. We a…
Low-redshift tests of Newtonian cosmologies with a time-varying gravitational constant
Ekim Taylan Hanımeli, Isaac Tutusaus, Brahim Lamine +1
In this work, we investigate Newtonian cosmologies with a time-varying gravitational constant, . We examine whether such models can reproduce the low-redshift cosmological ob…
CMB tensions with low-redshift and measurements: impact of a redshift-dependent type-Ia supernovae intrinsic luminosity
Matteo Martinelli, Isaac Tutusaus
With the recent increase in precision of our cosmological datasets, measurements of CDM model parameter provided by high- and low-redshift observations started to be in tension,…