Astrophysical: Dark energy

  • Publication
    Evidence for a high-z ISW signal from supervoids in the distribution of eBOSS quasars
    The late-time integrated Sachs-Wolfe (ISW) imprint of $R\gtrsim 100~h^{-1}\, \mathrm{Mpc}$ superstructures is sourced by evolving large-scale potentials due to...
  • Publication
    Fast simulation mapping: From standard to modified gravity cosmologies using the bias assignment method
    Context. We assess the effectiveness of a non-parametric bias model in generating mock halo catalogues for modified gravity (MG) cosmologies, relying on the...
  • Publication
    Field-level Lyman-α forest modeling in redshift space via augmented nonlocal Fluctuating Gunn-Peterson Approximation
    Context. Devising fast and accurate methods of predicting the Lyman-α forest at the field level, avoiding the computational burden of running large-volume...
  • Publication
    Fitting of supernovae without dark energy
    With data from Pantheon, we have at our disposal a sample of more than a 1000 supernovae Ia covering a wide range of redshifts with good precision. Here, we...
  • Talk
    From Cosmology to Galaxies and Back Again
    The evidence for the existence of dark energy is conclusive, but its nature remains one of the most puzzling mysteries in all of physics. Astronomical surveys...
  • Publication
    Fundamental physics with ESPRESSO: Constraining a simple parametrisation for varying α
    Context. The spectrograph ESPRESSO recently obtained a limit on the variation of the fine-structure constant, α, through measurements along the line of sight of...
  • Talk
    How to use a cosmological N-body simulation as a theoretical model
    A key problem that we are facing in cosmology nowadays is that we cannot make accurate predictions with our current theoretical models. We have all of the...
  • Talk
    How well does galaxy clustering constrain cosmology?
    On the LCDM cosmology, dark matter collapses into virialised objects called haloes. The abundance and distribution of these haloes are a direct consequence of...
  • Talk
    Measuring Dark Energy with Massive Redshift Surveys
    The Baryon Oscillation Spectroscopic Survey (BOSS) is a Stage III dark energy experiment on the Sloan Telescope. For the five years from 2009-2014, we are...