Astrophysical: Dark matter

  • Publication
    NIHAO XXI: the emergence of low surface brightness galaxies
    The existence of galaxies with a surface brightness μ lower than the night sky has been known since three decades. Yet, their formation mechanism and emergence...
  • Publication
    Numerical simulations of dark matter haloes produce polytropic central cores when reaching thermodynamic equilibrium
    Self-gravitating astronomical objects often show a central plateau in the density profile (core) whose physical origin is hotly debated. Cores are theoretically...
  • Publication
    Observation of fine structure in the cold phase of the local interstellar medium using K I absorption
    The K I 7699-A resonance absorption line was used to observe a group of 18 early-type stars within a 200-pc radius of the sun with a signal-to-noise ratio of 50...
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    Observations of the Lensed Quasar Q2237+0305 with CanariCam at GTC
    We present new mid-IR observations of the quadruply lensed quasar Q2237+0305 taken with CanariCam on the Gran Telescopio Canarias. Mid-IR emission by hot dust...
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    Observing the Dark Matter Density Profile of Isolated Galaxies
    Using the Sloan Digital Sky Survey (SDSS), we probe the halo mass distribution by studying the velocities of satellites orbiting isolated galaxies. In a...
  • Publication
    On an analytical framework for voids: their abundances, density profiles and local mass functions
    We present a general analytical procedure for computing the number density of voids with radius above a given value within the context of gravitational...
  • Publication
    On the Connection between Planets, Dark Matter and Cancer: Comment on “Planetary Dependence of Melanoma”
    In a recent paper, Zioutas and Valachovic (2018) claim that dark matter is responsible for a significant fraction of the melanoma skin cancer. This conclusion...
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    On the orbital velocity of isolated galaxy pairs: a test of gravity in the low acceleration regime
    The dynamics of isolated galaxy pairs represents an important tool to investigate the behaviour of gravity in the low acceleration regime. Statistical analysis...
  • Publication
    On the orbital velocity of isolated galaxy pairs: II accurate MOND predictions
    Examining a catalogue of isolated galaxy pairs, a preferred orbital intervelocity of ~ 150 km s -1 was recently reported. This discovery is difficult to...