Astrophysical: Dark matter

  • News
    Big Data to model the evolution of the cosmic web
    The Instituto de Astrofísica de Canarias (IAC) has led an international team which has developed an algorithm called COSMIC BIRTH to analyse large scale cosmic...
  • Publication
    Bulk viscous cosmological models with a cosmological constant: Observational constraints
    Aims. We investigate whether viscous cold dark matter (vCDM) in a Λ-dominated Friedmann-Lemaître-Robertson-Walker (FLRW) universe can alleviate the Hubble...
  • Publication
    C-19 and Hot, Wide Star Streams
    The C-19 star stream has the abundance characteristics of an unusually metal-poor globular cluster but kinematically is uncharacteristically hot and wide for a...
  • Publication
    Can a negative-mass cosmology explain dark matter and dark energy?
    A recent study by Farnes (2018, A&A, 620, A92) proposed an alternative cosmological model in which both dark matter and dark energy are replaced with a single...
  • Talk
    Can Voids and Superclusters trace Dark Energy?
    I revisit the claim of Dark Energy detection after stacking CMB data on the angular position of voids and superclusters in Sloan Data. I examine the...
  • Publication
    Challenging a Newtonian prediction through Gaia wide binaries
    Under Newtonian dynamics, the relative motion of the components of a binary star should follow a Keplerian scaling with separation. Once orientation effects and...
  • Publication
    Charting the Galactic Acceleration Field. I. A Search for Stellar Streams with Gaia DR2 and EDR3 with Follow-up from ESPaDOnS and UVES
    We present maps of the stellar streams detected in the Gaia Data Release 2 (DR2) and Early Data Release 3 (EDR3) catalogs using the STREAMFINDER algorithm. We...
  • Publication
    Charting the Galactic Acceleration Field. II. A Global Mass Model of the Milky Way from the STREAMFINDER Atlas of Stellar Streams Detected in Gaia DR3
    We present an atlas and follow-up spectroscopic observations of 87 thin stream-like structures detected with the STREAMFINDER algorithm in Gaia DR3, of which 28...
  • Publication
    Chemo-dynamics of the stellar component of the Sculptor dwarf galaxy: II. Dynamical properties and dark matter halo density
    Dwarf galaxy satellites of the Milky Way are excellent laboratories for testing dark matter (DM) models and baryonic feedback implementation in simulations. The...