Astrophysical: Dark matter

  • 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 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...
  • Publication
    Cusped Mass Models of Gravitational Lenses
    Recent observations of galaxy luminosity profiles and dark matter simulations find luminosity and mass distributions characterized by central cusps rather than...
  • Talk
    DALI, a pioneering dark matter telescope
    Axion detection would be one of the most exciting moments in the entire history of science. This hypothetical particle can simultaneously explain two...
  • Publication
    Dark bursts in the Swift era
    The nature of the dark bursts is still not fully understood. Here, we report on some of our recent studies on Swift dark bursts. Thereby, we pay particular...