Astrophysical: Galaxies

  • Publication
    Global properties of the population of HII regions in NGC 7479 from photometric Hα imaging
    We present a new high quality continuum-subtracted Hα image of NGC 7479. Using a novel semi-automated technique we have determined the positions, angular sizes...
  • Publication
    Globular Cluster and Galaxy Formation: M31, the Milky Way, and Implications for Globular Cluster Systems of Spiral Galaxies
    We find that the globular cluster (GC) systems of the Milky Way and of our neighboring spiral galaxy, M31, comprise two distinct entities, differing in three...
  • Publication
    Globular cluster ejection, infall, and the host dark matter halo of the Pegasus dwarf galaxy
    Recent photometric observations revealed a massive, extended (M GC ≳ 10 5 M ☉; R h ̃ 14 pc) globular cluster (GC) in the central region (D 3D ≲ 100 pc) of the...
  • Publication
    Globular cluster formation from gravitational tidal effects of merging and interacting galaxies
    We investigate the spatial, kinematic and chemical properties of globular cluster systems formed in merging and interacting galaxies using N-body-smoothed...
  • Publication
    Globular Cluster Metallicity Subpopulations in NGC 4472
    Bimodality is a common feature of globular cluster (GC) color distributions in galaxies. Although it is well known that the GC system of the Milky Way is...
  • Publication
    Globular Cluster Populations: First Results from S4G Early-type Galaxies
    Using 3.6 μm images of 97 early-type galaxies, we develop and verify methodology to measure globular cluster populations from the S4G survey images. We find...
  • Publication
    Globular Cluster Populations: Results Including S4G Late-type Galaxies
    Using 3.6 and 4.5 μm images of 73 late-type, edge-on galaxies from the S4G survey, we compare the richness of the globular cluster populations of these galaxies...
  • Publication
    Globular cluster systems as tracers of environmental effects on Virgo early-type dwarfs
    Early-type dwarfs (dEs) are by far the most abundant galaxy population in nearby clusters. Whether these objects are primordial, or the recent end products of...
  • Publication
    Globular Cluster Systems in Elliptical Galaxies of Coma
    Globular cluster systems of 17 elliptical galaxies have been studied in the Coma Cluster of galaxies. Surface-brightness fluctuations have been used to...