Astrofísicas: Grupo local

  • Publicación
    A VLT/FORS2 spectroscopic survey of individual stars in a transforming dwarf galaxy
    Understanding the properties of dwarf galaxies is important not only to put them in their proper cosmological context, but also to understand the formation and...
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    A wide-area view of the Phoenix dwarf galaxy from Very Large Telescope/FORS imaging
    We present results from a wide-area photometric survey of the Phoenix dwarf galaxy, one of the rare dwarf irregular/dwarf spheroidal transition-type galaxies...
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    Adventures of a tidally induced bar
    Using N-body simulations, we study the properties of a bar induced in a discy dwarf galaxy as a result of tidal interaction with the Milky Way. The bar forms at...
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    AGB and RGB stars as tracers of the early and intermediate star-formation history.
    The Milky Way and Andromeda galaxies are the largest members of the Local Group, and their evolution is affected by the evolution of their host as a whole. At...
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    An optical and H i study of the dwarf Local Group galaxy VV124 = UGC4879. A gas-poor dwarf with a stellar disk?
    We present a detailed study of the dwarf galaxy VV124 (UGC4879), recently recognized as a remarkably isolated member of the Local Group. We have obtained deep...
  • Publicación
    Andromeda II as a merger remnant
    Using N-body simulations, we study the origin of prolate rotation observed in the kinematic data for Andromeda II (And II), a dwarf spheroidal satellite of M31...
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    Appearances can be deceiving: clear signs of accretion in the seemingly ordinary Sextans dSph
    We report the discovery of clear observational signs of past accretion/merger events in one of the Milky Way satellite galaxies, the Sextans dwarf spheroidal...
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    Binary star population of the Sculptor dwarf galaxy
    Aims: We aim to compute the binary fraction of "classical" dwarf spheroidal galaxies (dSphs) that are satellites of the Milky Way (MW). This value can offer...
  • Publicación
    Carbon and nitrogen abundances of individual stars in the Sculptor dwarf spheroidal galaxy
    We present [C/Fe] and [N/Fe] abundance ratios and CH(λ4300) and S(λ3883) index measurements for 94 red giant branch (RGB) stars in the Sculptor dwarf spheroidal...