Astrophysical: Cosmology

  • Publication
    High z Radio-Loud and Radio-Quiet QSO Environments
    We propose a systematic study of the environments of a representative sample of Radio Loud Quasars (RLQ) and Radio Quiet Quasars (RQQ) in two different redshift...
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    High-sensitivity measurements of the cosmic microwave background power spectrum with the extended Very Small Array
    We present deep Ka-band (ν~ 33 GHz) observations of the cosmic microwave background (CMB) made with the extended Very Small Array (VSA). This configuration...
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    High-velocity clouds as dark matter in the Local Group
    The High-Velocity Clouds (HVCs) observed in the Galactic neighbourhood, have been proposed to be remnants of the formation of the galaxies in the Local Group...
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    Higher order Hamiltonian Monte Carlo sampling for cosmological large-scale structure analysis
    We investigate higher order symplectic integration strategies within Bayesian cosmic density field reconstruction methods. In particular, we study the fourth...
  • Publication
    How Far Do They Go? The Outer Structure of Galactic Dark Matter Halos
    We study the density profiles of collapsed galaxy-size dark matter halos with masses 1011 to 5×1012 Msolar focusing mostly on the halo outer regions from the...
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    Hubble tensions: a historical statistical analysis
    Statistical analyses of measurements of the Hubble-Lemaître constant H 0 (163 measurements between 1976 and 2019) show that the statistical error bars...
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    Impact of young stellar components on quiescent galaxies: deconstructing cosmic chronometers
    Context. Cosmic chronometers may be used to measure the age difference between passively evolving galaxy populations to calculate the Hubble parameter H(z) as a...
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    Improved CMB anisotropy constraints on primordial magnetic fields from the post-recombination ionization history
    We investigate the impact of a stochastic background of primordial magnetic fields (PMF) generated before recombination on the ionization history of the...
  • Publication
    Improving baryon acoustic oscillation measurement with the combination of cosmic voids and galaxies
    We develop a methodology to optimize the measurement of baryon acoustic oscillation (BAO) from a given galaxy sample. In our previous work, we demonstrated that...