Astrophysical: Dwarf galaxies

  • Publication
    The Undiscovered Ultradiffuse Galaxies of the Local Group
    Ultradiffuse galaxies (UDGs) are attractive candidates to probe cosmological models and test theories of galaxy formation at low masses; however, they are...
  • Publication
    Timing the r-process Enrichment of the Ultra-faint Dwarf Galaxy Reticulum II
    The ultra-faint dwarf galaxy Reticulum II (Ret II) exhibits a unique chemical evolution history, with ${72}_{-12}^{+10}$ % of its stars strongly enhanced in r...
  • Publication
    Unraveling the Complexity of Dwarf Galaxy Dynamics: A Study of Binary Orbital Motions
    We investigate the impact of binary orbital motions on the dynamical modeling of dwarf galaxies with intrinsic line-of-sight velocity dispersions ( ${\sigma }_{...
  • Publication
    Using color-magnitude diagrams and spectroscopy to derive star formation histories: VLT observations of Fornax
    We undertook a study of the star formation and chemical enrichment history of the Fornax dSph galaxy. We used the VLT with FORS1 to obtain photometry reaching...
  • Publication
    Variable Stars in Local Group Galaxies. VI. The Isolated Dwarfs VV 124 and KKr 25
    We present the discovery of variable stars in two isolated dwarf galaxies in the outskirts of the Local Group, VV 124 and KKr 25, using observations with the...
  • Talk
    What do the neighbors look like? A comparative look at the Milky Way and Andromeda dwarf galaxies
    Dwarf galaxies are powerful tools of near-field cosmology and galactic archaeology: their numbers, distribution, and star formation can be linked to both the...
  • Talk
    What is the Milky Way outer halo made of? High resolution spectroscopy of distant red giants
    In a framework where galaxies form hierarchically, extended stellar haloes are predicted to be an ubiquitous feature around Milky Way-like galaxies and to...
  • Talk
    Which galaxies host bars and disks? A study of the Coma Cluster ; (2)First results of Herschel and the HerMES extragalactic survey
    (1) In this talk I will present a recent study of the bar fraction in the Coma Cluster galaxies based on a sample of 190 galaxies selected from the Sloan...
  • Publication
    Young, Blue, and Isolated Stellar Systems in the Virgo Cluster. II. A New Class of Stellar System
    We discuss five blue stellar systems in the direction of the Virgo cluster, analogous to the enigmatic object SECCO 1 (AGC 226067). These objects were...