Astrophysical: Galaxies

  • Publication
    A Technique for Separating the Gravitational Torques of Bars and Spirals in Disk Galaxies
    We describe a Fourier-based method of separating bars from spirals in near-infrared images. The method takes advantage of the fact that a bar is typically a...
  • Publication
    A Third Massive Star Component in the σ Orionis AB System
    We report on the detection of a third massive star component in the σ Orionis AB system, traditionally considered as a binary system. The system has been...
  • Publication
    A Tidal Extension in the Ursa Minor Dwarf Spheroidal Galaxy
    We report the detection of main-sequence and blue horizontal-branch stars of the Ursa Minor dwarf spheroidal galaxy beyond its tidal radius, indicating the...
  • Publication
    A tidal tale: detection of several stellar streams in the environment of NGC 1052
    The possible existence of two dark-matter-free galaxies (NGC 1052-DF2 and NGC 1052-DF4) in the field of the early-type galaxy NGC 1052 presents a challenge to...
  • Publication
    A Two Micron All Sky Survey View of the Sagittarius Dwarf Galaxy. VI. s-Process and Titanium Abundance Variations Along the Sagittarius Stream
    We present high-resolution spectroscopic measurements of the abundances of the α element titanium (Ti) and s-process elements yttrium (Y) and lanthanum (La) for...
  • Publication
    A unified model for age-velocity dispersion relations in Local Group galaxies: disentangling ISM turbulence and latent dynamical heating
    We analyse age-velocity dispersion relations (AVRs) from kinematics of individual stars in eight Local Group galaxies ranging in mass from Carina (M* ˜ 106 M⊙)...
  • Publication
    A unified picture of breaks and truncations in spiral galaxies from SDSS and S4G imaging
    The mechanism causing breaks in the radial surface-brightness distribution of spiral galaxies is not yet well known. Despite theoretical efforts, there is not a...
  • Publication
    A very dark stellar system lost in Virgo: kinematics and metallicity of SECCO 1 with MUSE
    We present the results of VLT-MUSE (Very Large Telescope-Multi Unit Spectroscopic Explorer) integral field spectroscopy of SECCO 1, a faint, star-forming...
  • Publication
    A Very Small Array search for the extended Sunyaev-Zel'dovich effect in the Corona Borealis supercluster
    We present interferometric imaging at 33 GHz of the Corona Borealis supercluster, using the extended configuration of the Very Small Array. A total area of 24...