Astrophysical: Galaxies

  • Publication
    Active Galactic Nuclei Feedback and the Origin and Fate of the Hot Gas in Early-type Galaxies
    A recent determination of the relationships between the X-ray luminosity of the ISM (L X) and the stellar and total mass for a sample of nearby early-type...
  • Publication
    Adaptive optics near infrared integral field spectroscopy of NGC 2992
    Aims: NGC 2992 is an intermediate Seyfert 1 galaxy showing outflows on kilo parsec scales which might be due either to AGN or starburst activity. We therefore...
  • Publication
    Adaptive Optics Observations of Active Galactic Nuclei: Zooming into the Central Parsec Region
    First results from the AGN-Heidelberg program aimed at resolving the central pc region of the closest Active Galactic Nuclei in the IR are presented. The core...
  • Publication
    Adventures of a tidally induced bar
    Using N-body simulations, we study the properties of a bar induced in a discy dwarf galaxy as a result of tidal interaction with the Milky Way. The bar forms at...
  • Publication
    Age and metallicity gradients in early-type galaxies: a dwarf-to-giant sequence
    We studied the stellar populations of 40 early-type galaxies using medium-resolution long-slit spectroscopy along their major axes (and along the minor axis for...
  • Publication
    Age and metallicity gradients support hierarchical formation for M87
    In order to probe the inside-out formation of the most massive galaxies in the Universe, we have explored the radial (0.1 ≲ R ≲ 8 kpc) variation of the spectral...
  • Publication
    Age Estimates for Globular Clusters in NGC 1399
    We present high signal-to-noise Keck spectra for 10 globular clusters associated with the giant Fornax elliptical galaxy NGC 1399 and compare measured line...
  • Publication
    Age-dating a star-burst with GEMINI/CIRPASS observations of the core of M83
    We present preliminary results from a set of near-IR integral field spectroscopic observations of the central, star-burst, regions of the barred spiral galaxy...
  • Publication
    Ages and metallicities of globular clusters in NGC 4472
    We have derived ages and metallicities from co-added spectra of 131 globular clusters associated with the giant elliptical galaxy NGC 4472. Based upon a...