Astrophysical: Dark matter

  • News
    New light on baryonic matter and gravity on cosmic scales
    Scientists estimate that dark matter and dark energy together are some 95% of the gravitational material in the universe while the remaining 5% is baryonic...
  • Publication
    nIFTy galaxy cluster simulations - I. Dark matter and non-radiative models
    We have simulated the formation of a galaxy cluster in a Λ cold dark matter universe using 13 different codes modelling only gravity and non-radiative...
  • Publication
    NIHAO - XIV. Reproducing the observed diversity of dwarf galaxy rotation curve shapes in ΛCDM
    The significant diversity of rotation curve (RC) shapes in dwarf galaxies has recently emerged as a challenge to Λ cold dark matter (ΛCDM): in dark matter (DM)...
  • Publication
    NIHAO XXI: the emergence of low surface brightness galaxies
    The existence of galaxies with a surface brightness μ lower than the night sky has been known since three decades. Yet, their formation mechanism and emergence...
  • Publication
    Numerical simulations of dark matter haloes produce polytropic central cores when reaching thermodynamic equilibrium
    Self-gravitating astronomical objects often show a central plateau in the density profile (core) whose physical origin is hotly debated. Cores are theoretically...
  • Publication
    Observation of fine structure in the cold phase of the local interstellar medium using K I absorption
    The K I 7699-A resonance absorption line was used to observe a group of 18 early-type stars within a 200-pc radius of the sun with a signal-to-noise ratio of 50...
  • Publication
    Observations of the Lensed Quasar Q2237+0305 with CanariCam at GTC
    We present new mid-IR observations of the quadruply lensed quasar Q2237+0305 taken with CanariCam on the Gran Telescopio Canarias. Mid-IR emission by hot dust...
  • Publication
    Observing the Dark Matter Density Profile of Isolated Galaxies
    Using the Sloan Digital Sky Survey (SDSS), we probe the halo mass distribution by studying the velocities of satellites orbiting isolated galaxies. In a...
  • Publication
    On an analytical framework for voids: their abundances, density profiles and local mass functions
    We present a general analytical procedure for computing the number density of voids with radius above a given value within the context of gravitational...