Astrophysical: Galaxies

  • Publication
    The galaxy major merger fraction to {z} 1
    Aims: The importance of disc-disc major mergers in galaxy evolution remains uncertain. We study the major merger fraction in a SPITZER/IRAC-selected catalogue...
  • Publication
    The galaxy size to halo spin relation of disc galaxies in cosmological hydrodynamical simulations
    In the standard disc galaxy formation model, the sizes of galactic discs are tightly related to the spin parameters λ of their dark matter haloes. The model has...
  • Publication
    The Galaxy-wide Distributions of Mean Electron Density in the H II Regions of M51 and NGC 4449
    Using Advanced Camera for Surveys-Hubble Space Telescope images to yield continuum-subtracted photometric maps in Hα of the Sbc galaxy M51 and the dwarf...
  • Publication
    The galaxy-wide initial mass function of dwarf late-type to massive early-type galaxies
    Observational studies are showing that the galaxy-wide stellar initial mass function (IMF) is top-heavy in galaxies with high star formation rates (SFRs)...
  • Publication
    The GALEX/S4G Surface Brightness and Color Profiles Catalog. I. Surface Photometry and Color Gradients of Galaxies
    We present new spatially resolved surface photometry in the far-ultraviolet (FUV) and near-ultraviolet (NUV) from images obtained by the Galaxy Evolution...
  • Publication
    The GALEX/S4G UV–IR Color–Color Diagram: Catching Spiral Galaxies Away from the Blue Sequence
    We obtained GALEX FUV, NUV, and Spitzer/IRAC 3.6 μm photometry for \gt 2000 galaxies, available for 90% of the S4G sample. We find a very tight GALEX blue...
  • Publication
    The Gamma-Ray Bright BL Lacertae Object RX J1211+2242
    RX J1211+2242 is an optically faint (B~=19.2mag) but X-ray bright (f2-10keV=5×10-12ergscm-2s-1) active galactic nucleus (AGN) that has been shown to be a BL Lac...
  • Publication
    The GECKOS survey: Identifying kinematic sub-structures in edge-on galaxies
    The vertical evolution of galactic discs is governed by the sub-structures within them. Several of these features, including bulges and kinematically distinct...
  • Publication
    The GECKOS survey: Jeans anisotropic models of edge-on discs uncover the impact of dust and kinematic structures
    The central regions of disc galaxies host a rich variety of stellar structures: nuclear discs, bars, bulges, and boxy-peanut bulges. These components are often...