Journal: The Astrophysical Journal

  • Publication
    The Impact of Non-LTE Effects and Granulation Inhomogeneities on the Derived Iron and Oxygen Abundances in Metal-Poor Halo Stars
    This paper presents the results of a detailed theoretical investigation of the impact of non-LTE (NLTE) effects and of granulation inhomogeneities on the...
  • Publication
    The Impact of Quantum Interference between Different J-levels on Scattering Polarization in Spectral Lines
    The spectral line polarization produced by optically pumped atoms contains a wealth of information on the thermal and magnetic structure of a variety of...
  • Publication
    The Impact of the Angle-average Approximation in the Partial Frequency Redistribution Modeling of the Mg II h–k Doublet Stokes Profiles
    In recent years, the Mg II h and k lines have become increasingly important for the diagnostics of magnetic fields in the solar chromosphere, motivated both by...
  • Publication
    The Impact of the Mass Spectrum of Lenses in Quasar Microlensing Studies. Constraints on a Mixed Population of Primordial Black Holes and Stars
    We show that quasar microlensing magnification statistics induced by a population of point microlenses distributed according to a mass spectrum can be very well...
  • Publication
    The Influence of Bulge Profile Shapes on Claims for a Scale-free Hubble Sequence for Spiral Galaxies
    We investigate recent claims that the Hubble sequence of spiral galaxies is scale-free. Fundamental to this investigation is the fact that within the...
  • Publication
    The Influence of Coronal EUV Irradiance on the Emission in the He I 10830 Å and D3 Multiplets
    Two of the most attractive spectral windows for spectropolarimetric investigations of the physical properties of the plasma structures in the solar chromosphere...
  • Publication
    The Influence of Gravitational Microlensing on the Broad Emission Lines of Quasars
    We discuss the effects of microlensing on the broad emission lines (BELs) of QSOs in the light of recent determinations of the size of the broad-line region...
  • Publication
    The Influence of Metallicity on Stellar Differential Rotation and Magnetic Activity
    Observations of Sun-like stars over the past half-century have improved our understanding of how magnetic dynamos, like that responsible for the 11 yr solar...
  • Publication
    The Infrared Nuclear Emission of Seyfert Galaxies on Parsec Scales: Testing the Clumpy Torus Models
    We present subarcsecond resolution mid-infrared (mid-IR) photometry in the wavelength range from 8 to 20 μm of 18 Seyfert galaxies, reporting high spatial...