Publicaciones

  • Self-interacting dark matter and the delay of supermassive black hole growth

    Using cosmological hydrodynamic simulations with physically motivated models of supermassive black hole (SMBH) formation and growth, we compare the assembly of Milky Way-mass (Mvir ≍ 7 × 1011 M☉ at z = 0) galaxies in cold dark matter (CDM) and self-interacting dark matter (SIDM) models. Our SIDM model adopts a constant cross-section of 1 cm2 g-1

    Cruz, A. et al.

    Fecha de publicación:

    11
    2020
  • Euclid preparation. X. The Euclid photometric-redshift challenge

    Forthcoming large photometric surveys for cosmology require precise and accurate photometric redshift (photo-z) measurements for the success of their main science objectives. However, to date, no method has been able to produce photo-zs at the required accuracy using only the broad-band photometry that those surveys will provide. An assessment of

    Euclid Collaboration et al.

    Fecha de publicación:

    12
    2020
  • Spectroscopic classification of a complete sample of astrometrically-selected quasar candidates using Gaia DR2

    Here we explore the efficiency and fidelity of a purely astrometric selection of quasars as point sources with zero proper motions in the Gaia data release 2 (DR2). We have built a complete candidate sample including 104 Gaia-DR2 point sources, which are brighter than 20th magnitude in the Gaia G-band within one degree of the north Galactic pole

    Heintz, K. E. et al.

    Fecha de publicación:

    12
    2020
  • The Galaxy "Missing Dark Matter" NGC 1052-DF4 is Undergoing Tidal Disruption

    The existence of long-lived galaxies lacking dark matter represents a challenge to our understanding of how galaxies form. Here, we present evidence that explains the lack of dark matter in one such galaxy: NGC 1052-DF4. Deep optical imaging of the system has detected tidal tails in this object caused by its interaction with its neighboring galaxy

    Montes, Mireia et al.

    Fecha de publicación:

    12
    2020
  • What future awaits the Sun?

    The Sun and other similar (solar-like) stars have an internal magnetic field that can emerge on the surface, forming features such as dark spots, which drive the so-called magnetic activity. For both the Sun and solar-like stars, magnetic activity varies with time and strongly correlates with photometric (brightness) variability. In the solar and

    Santos, Ângela R. G. et al.

    Fecha de publicación:

    5
    2020
  • OBSERVACIÓN DE LA CONVECCIÓN EN ESTRELLAS DE TIPO SOLAR

    Se han analizado series temporales de las fluctuaciones de la irradiancia solar integrada sobre el disco provenientes del experimento espacial "Variability of the solar IRradiance and Gravity Oscillations" (VIRGO) durante dos épocas correspondientes una, a un máximo de actividad magnética, y la otra, a un mínimo. En cada caso, se han ajustado las

    Héctor Vázquez Ramió

    Fecha de publicación:

    11
    2009