Astrofísicas: Estrellas enanas blancas

  • Publicación
    Geometry of the Draco C1 Symbiotic Binary
    Draco C1 is a known symbiotic binary star system composed of a carbon red giant and a hot, compact companion—likely a white dwarf—belonging to the Draco dwarf...
  • Publicación
    Non-local thermodynamic equilibrium line profiles, rotation, and magnetic fields in seven DA white dwarfs
    Non-LTE calculations of H-alpha line profiles are presented and applied to derive rotational velocities from high-resolution spectra of DA white dwarfs. This...
  • Publicación
    Observation of a variable, ZZ Ceti white dwarf: GD154
    The ZZ Ceti stars form a class of variable white dwarfs: the hydrogen dominated atmosphere ones, which do pulsate in an instability strip in the effective...
  • Publicación
    On the O/Fe versus Fe/H relationship and the progenitors of type I supernovae
    The new observational O/Fe versus Fe/H abundance relationship for halo stars is studied in terms of several models of chemical evolution for the solar...
  • Publicación
    Preliminary Target Selection for the DESI Milky Way Survey (MWS)
    The DESI Milky Way Survey (MWS) will observe ≥8 million stars between 16 < r < 19 mag, supplemented by observations of brighter targets under poor observing...
  • Publicación
    Red giant stragglers and He white dwarfs in galactic globulars
    The evolutionary scenario concerning the production and the cooling of He white dwarfs is revisited and discussed. We show that, for a given star metallicity...
  • Publicación
    Strong Carbon Features and a Red Early Color in the Underluminous Type Ia SN 2022xkq
    We present optical, infrared, ultraviolet, and radio observations of SN 2022xkq, an underluminous fast-declining Type Ia supernova (SN Ia) in NGC 1784 (D ≈ 31...
  • Noticia
    TESS, Spitzer y GTC detectan el primer planeta orbitando una enana blanca
    Con datos del satélite TESS de la NASA, el retirado telescopio espacial Spitzer y el Gran Telescopio Canarias (GTC), un equipo internacional de astrónomos, en...
  • Publicación
    The early nucleosynthesis of O and Fe
    The new observational O/Fe vs Fe/H relationship in halo dwarfs is analyzed in terms of a model of chemical evolution for the solar neighborhood. The role of...