Astrophysical: Dark matter

  • News
    A single collision in 10 billion years could explain how dark matter is distributed within dwarf galaxies
    Ultra-faint dwarf galaxies, among the tiniest and faintest galaxies known, may hold the key to understanding one of the Universe’s biggest mysteries: the true...
  • News
    A step forward to solve the mystery of ultra-diffuse galaxies
    A study by the Instituto de Astrofísica de Canarias (IAC), led by researchers Nushkia Chamba, Ignacio Trujillo and Johan H. Knapen, reveals that the enigmatic...
  • Publication
    Abundance of LIGO/Virgo Black Holes from Microlensing Observations of Quasars with Reverberation Mapping Size Estimates
    Assuming a population of black holes (BHs) with masses in the range inferred by LIGO/Virgo from BH mergers, we use quasar microlensing observations to estimate...
  • News
    ALLAN SANDAGE: “La materia oscura podría estar constituida por rocas”
    Trabajar con Edwin Hubble y medir la constante de Hubble le han elevado al olimpo de la ciencia astronómica. Norteamericano de Iowa, donde nació en 1926...
  • Publication
    Alternative ideas in cosmology
    Some remarkable examples of alternative cosmological theories are reviewed here, ranging from a compilation of variations on the Standard Model through the more...
  • Publication
    An almost dark galaxy with the mass of the Small Magellanic Cloud
    Almost dark galaxies are objects that have eluded detection by traditional surveys such as the Sloan Digital Sky Survey (SDSS). The low surface brightness of...
  • Publication
    Anisotropic satellite accretion on to the Local Group with HESTIA
    How the cosmic web feeds haloes, and fuels galaxy formation is an open question with wide implications. This study explores the mass assembly in the Local Group...
  • Publication
    Anisotropy measurements of the cosmic microwave background radiation at intermediate angular scales
    Galaxy formation by gravitational instability implies the presence of temperature fluctuations in the cosmic microwave background. New observations at 10.45 and...
  • Publication
    Appearances can be deceiving: clear signs of accretion in the seemingly ordinary Sextans dSph
    We report the discovery of clear observational signs of past accretion/merger events in one of the Milky Way satellite galaxies, the Sextans dwarf spheroidal...