Astrophysical: Galaxies

  • Publication
    Pegasus V/Andromeda XXXIV-a newly discovered ultrafaint dwarf galaxy on the outskirts of Andromeda
    We report the discovery of an ultrafaint dwarf in the constellation of Pegasus. Pegasus V (Peg V)/Andromeda XXXIV was initially identified in the public imaging...
  • Publication
    PEP: First Herschel probe of dusty galaxy evolution up to z ~ 3
    Aims: We exploit the deepest existing far-infrared (FIR) data obtained so far by Herschel at 100 and 160 μm in the GOODS-N, as part of the PACS evolutionary...
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    Pericentric passage-driven star formation in satellite galaxies and their hosts: CLUES from local group simulations
    Local Group satellite galaxies show a wide diversity of star formation histories (SFHs) whose origin is yet to be fully understood. Using hydrodynamical...
  • Publication
    PG 1553+113: Five Years of Observations with MAGIC
    We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs; E > 100 GeV). Power-law...
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    Photoionization Models of Metal-poor Extragalactic H 0 Regions and the Primordial Helium Abundance
    We discuss the effects of collisional enhancement of Balmer lines on the determination of the primordial helium abundance. To this aim, we present a...
  • Publication
    Photoionization Models of NGC 2363 and Their Implications for the Ionizing Star Cluster
    Using the photoionization code CLOUDY, we compute photoionization models for the giant extragalactic H II region NGC 2363 and compare them with optical...
  • Publication
    Photoionization Models of NGC 346
    We have compared direct estimates of the ionizing photon flux from the stars observed within the H II region NGC 346 in the Small Magellanic Cloud with its...
  • Publication
    Photoionization Models of NGC 346
    We present spherically symmetric and plane-parallel photoionization models of NGC 346, an H II region in the Small Magellanic Cloud. The models are based on...
  • Publication
    Photoionization of the Diffuse Interstellar Gas in Spirals by Lyman Photons Escaping from H II Regions
    The existence of an extended component of diffuse ionized gas (DIG) is a well-known property of spiral galaxies. The integrated ensuremath {{H}alpha }...