Astrophysical: Galaxies

  • Publication
    An Optical-Near-IR Study of a Triplet of Super Star Clusters in the Starburst Core of M82
    We present HST/STIS optical and Gemini/NIFS near-IR IFU spectroscopy and archival Hubble Space Telescope (HST) imaging of the triplet of super star clusters (A1...
  • Publication
    An optimized Hβ index for disentangling stellar population ages
    We have defined a new Hβ absorption index definition, Hβo, which has been optimized as an age indicator for old and intermediate age stellar populations. Rather...
  • Publication
    An Overmassive Dark Halo around an Ultra-diffuse Galaxy in the Virgo Cluster
    Ultra-diffuse galaxies (UDGs) have the sizes of giants but the luminosities of dwarfs. A key to understanding their origins comes from their total masses, but...
  • Publication
    An unusual iron Lo-BAL quasar detected by ISOCAM
    We report the discovery of an unusual low-ionization broad absorption line quasar at z=1.776 which exhibits absorption lines from many excited states of Fe II...
  • Publication
    An unusual transient in the extremely metal-poor Galaxy SDSS J094332.35+332657.6 (Leoncino Dwarf)
    We have serendipitously discovered that Leoncino Dwarf, an ultrafaint, low-metallicity record-holder dwarf galaxy, may have hosted a transient source, and...
  • Publication
    An updated MILES stellar library and stellar population models
    Aims: We present a number of improvements to the MILES library and stellar population models. We correct some small errors in the radial velocities of the stars...
  • Publication
    An X-ray view of 82 LINERs with Chandra and XMM-Newton data
    We present the results of a homogeneous X-ray analysis for 82 nearby low-ionisation, narrow emission-line regions (LINERs) selected from the catalogue of...
  • Publication
    An XMM-Newton view of a small sample of Seyfert, 1 Galaxies
    We present a detailed analysis of all the X-ray data taken by the XMM-Newton satellite of a small sample of five Seyfert 1 galaxies: ESO 359-G19, HE 1143-1810...
  • Publication
    Analysis and calibration of CaII triplet spectroscopy of red giant branch stars from VLT/FLAMES observations
    We demonstrate that low-resolution CaII triplet (CaT) spectroscopic estimates of the overall metallicity ([Fe/H]) of individual red giant branch (RGB) stars in...