Astrofísicas: Galaxias

  • Publicación
    The nature of late-type spiral galaxies: structural parameters, optical and near-infrared colour profiles and dust extinction
    We analyse V- and H-band surface photometry of a sample of 18 Sb-Sd galaxies. Combining high-resolution Hubble Space Telescope (HST) images with ground-based...
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    The nature of LINER galaxies:. Ubiquitous hot old stars and rare accreting black holes
    Context. Galaxies, which often contain ionised gas, sometimes also exhibit a so-called low-ionisation nuclear emission line region (LINER). For 30 years, this...
  • Publicación
    The Nature of Luminous X-Ray Sources with Mid-Infrared Counterparts
    We investigate the luminous X-ray sources in the Lockman Hole (LH) and the extended Groth strip (EGS) detected at 24 μm using the Multiband Imaging Photometer...
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    The nature of nuclear Hα emission in LINERs
    To get insight into the nature of the ionized gas in the nuclear region of LINERs, we performed a study of HST Hα imaging of 32 LINERs. The main conclusion from...
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    The nature of proximate damped Lyman α systems
    We present high-resolution echelle spectra of seven proximate damped Lyman α (PDLA) systems. The relative velocity separation of each PDLA from the background...
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    The Nature of Starbursts. I. The Star Formation Histories of Eighteen Nearby Starburst Dwarf Galaxies
    We use archival Hubble Space Telescope observations of resolved stellar populations to derive the star formation histories (SFHs) of 18 nearby starburst dwarf...
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    The Nature of Starbursts. II. The Duration of Starbursts in Dwarf Galaxies
    The starburst phenomenon can shape the evolution of the host galaxy and the surrounding intergalactic medium. The extent of the evolutionary impact is partly...
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    The Nature of the Antlia Galaxy: A New Dwarf Irregular in the Outskirts of the Local Group.
    The Antlia dwarf galaxy, recently found to be a possible local Group member, is analyzed using VI photometry. The galaxy is resolved into a large number of...
  • Publicación
    The Nature of the Far-Infrared Emission from Seyfert Galaxies
    Optical R-band imaging data and far-infrared (FIR) Infrared Space Observatory data from Seyfert galaxies are combined to show that the compact optical emission...