Astrophysical: Early universe

  • Publication
    The primordial helium abundance and the number of neutrino families
    Based on observations of HII regions and on the new computations of the recombination coefficients of the HeI lines by Porter el al. we obtain a primordial...
  • Publication
    The Pristine survey - III. Spectroscopic confirmation of an efficient search for extremely metal-poor stars
    The Pristine survey is a narrow-band, photometric survey focused around the wavelength region of the Ca II H&K absorption lines, designed to efficiently search...
  • Publication
    The Pristine survey - VI. The first three years of medium-resolution follow-up spectroscopy of Pristine EMP star candidates
    We present the results of a 3-yr long, medium-resolution spectroscopic campaign aimed at identifying very metal-poor stars from candidates selected with the...
  • Talk
    The Standard Cosmological Model
    This is the first talk of a series of four aimed to discuss about Cosmology. Here, I will review the basic concepts of the standard cosmological model, which...
  • Publication
    The star formation history of the Sculptor dwarf spheroidal galaxy
    We present the star formation history (SFH) of the Sculptor dwarf spheroidal galaxy based on deep g, r photometry taken with Dark Energy Camera at the Blanco...
  • Publication
    The star formation history of the Sextans dwarf spheroidal galaxy: a true fossil of the pre-reionization era
    We present the star formation history (SFH) of the Sextans dwarf spheroidal galaxy based on deep archive B, I photometry taken with Suprime-Cam at Subaru...
  • Publication
    The Young and the Wild: What Happens to Protoclusters Forming at Redshift z ≈ 4?
    Using one of the largest volumes of the hydrodynamical cosmological simulation suit Magneticum, we study the evolution of protoclusters identified at redshift ≈...
  • Publication
    Time Variation of the Electron Mass in the Early Universe and the Barrow-Magueijo Model
    We put limits on the time variation of the electron mass in the early universe using observational primordial abundances of D, 4He, and 7Li, recent data from...
  • Publication
    Time variation of the fine structure constant in the early universe and the Bekenstein model
    Aims:We calculate the bounds on the variation in the fine structure constant at the time of primordial nucleosynthesis and at the time of neutral hydrogen...