Astrofísicas: Materia oscura

  • Charla
    Beyond the Concordance Model with galaxy cluster mass profiles
    I present the recent results obtained using the updated version of MG-MAMPOSSt, a code that constrains modified gravity (MG) models viable at cosmological...
  • Noticia
    Big Data para reconstruir la evolución de la red cósmica
    El Instituto de Astrofísica de Canarias (IAC) ha liderado un equipo internacional que ha desarrollado un algoritmo denominado COSMIC BIRTH para el análisis...
  • Publicación
    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...
  • Publicación
    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...
  • Charla
    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...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...