Astrophysical: Cosmological parameters

  • Publication
    Comparing approximate methods for mock catalogues and covariance matrices II: power spectrum multipoles
    We study the accuracy of several approximate methods for gravitational dynamics in terms of halo power spectrum multipoles and their estimated covariance matrix...
  • Publication
    Consistency of cosmic shear analyses in harmonic and real space
    Recent cosmic shear studies have reported discrepancies of up to 1σ on the parameter ${S_{8}=\sigma _{8}\sqrt{{\Omega _{\rm m}}/0.3}}$ between the analysis of...
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    Constraints on primordial magnetic fields from their impact on the ionization history with Planck 2018
    We update and extend our previous cosmic microwave background anisotropy constraints on primordial magnetic fields through their dissipation by ambipolar...
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    Constraints on the cosmic equation of state: Age conflict versus phantom energy. Age-redshift relations in an accelerated universe
    The currently available values and confidence limits for Ωm0, H0 and globular cluster ages still indicate that the dark energy that dominates the Universe could...
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    Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data
    The fraction of ionized gas in the warm-hot intergalactic medium induces temperature anisotropies on the cosmic microwave background similar to those of...
  • Publication
    COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses. IX. Time delays, lens dynamics and baryonic fraction in HE 0435-1223
    We present accurate time delays for the quadruply imaged quasar HE 0435-1223. The delays were measured from 575 independent photometric points obtained in the R...
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    Cosmological parameter estimation and Bayesian model comparison using Very Small Array data
    We constrain the basic cosmological parameters using the first observations by the Very Small Array (VSA) in its extended configuration, together with existing...
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    Cosmology from cross-correlation of ACT-DR4 CMB lensing and DES-Y3 cosmic shear
    Cross-correlation between weak lensing of the Cosmic Microwave Background (CMB) and weak lensing of galaxies offers a way to place robust constraints on...
  • Publication
    Cosmology with galaxy-galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ
    We describe our non-linear emulation (i.e. interpolation) framework that combines the halo occupation distribution (HOD) galaxy bias model with N-body...