Astrophysical: Dark matter

  • Publication
    Constraining meV axion dark matter with ALMA observations of the galactic center magnetar SGR 1745─2900
    We report a mm-wave search for axion dark matter from SGR 1745─2900, based on 4.8 h of ALMA observations. No candidate features are found between 133.99─135.78...
  • Publication
    Constraining the inner density slope of massive galaxy clusters
    We determine the inner density profiles of massive galaxy clusters (M 200 > 5 × 10 14 M ☉) in the Cluster-EAGLE (C-EAGLE) hydrodynamic simulations, and...
  • Publication
    Constraints on cosmological parameters from recent measurements of cosmic microwave background anisotropy
    We present new results from a study of recent cosmic microwave background (CMB) observations which provide the first strong evidence for the existence of a...
  • Publication
    Constraints on dark matter models from the stellar cores observed in ultra-faint dwarf galaxies: Self-interacting dark matter
    It has been proposed that the stellar cores observed in ultra-faint dwarf (UFD) galaxies reflect underlying dark matter (DM) cores that cannot be formed by...
  • Publication
    Constraints on the Abundance of Primordial Black Holes from X-Ray Quasar Microlensing Observations: Substellar to Planetary Mass Range
    We use X-ray observations of quasar microlensing (sensitive to smaller compact objects than in the optical) to study the possible presence of a population of...
  • Talk
    Constraints on Ultra-Light Dark Matter from Galactic Rotation Curves
    Bosonic ultra-light dark matter (ULDM) in the mass range m ~ $10^{-22} - 10^{-21} \rm eV$ has been invoked as a motivated candidate with new input for the small...
  • Talk
    Cosmic Microwave Background observations
    In the first part of this talk I will present a historical review of the CMB observations, one of the most powerful cosmological probes. Following the first...
  • Talk
    Cosmological giants and elves: galaxy formation and the small scale of cold dark matter
    I will review the status of our understanding of galaxy formation in the prevailing cold dark matter paradigm. After reviewing the successes and failures of the...
  • Talk
    Cosmology on small scales: the structure of (mostly) dark matter halos
    The standard model of cosmology -- the ``Lambda cold dark matter'' model -- is based on the idea that the dark matter is a collisionless elementary particle...