Journal: The Astrophysical Journal

  • Publication
    On the Inversion of the Scattering Polarization and the Hanle Effect Signals in the Hydrogen Lyα Line
    Magnetic field measurements in the upper chromosphere and above, where the gas-to-magnetic pressure ratio β is lower than unity, are essential for understanding...
  • Publication
    On the Ionizing Continuum in Active Galactic Nuclei: Clues from the Infrared Space Observatory
    The Infrared Space Observatory (ISO) coronal line spectrum of the brightest Seyfert galaxies from the CfA sample is presented and modeled. ISO observations of...
  • Publication
    On the Kinematic Separation of Field and Cluster Stars across the Bulge Globular NGC 6528
    We present deep and precise multi-band photometry of the Galactic bulge globular cluster NGC 6528. The current data set includes optical and near-infrared...
  • Publication
    On The Kinematics of Multiple-Shell Planetary Nebulae. I. Data and Expansion Velocities
    We present spatially resolved echelle spectroscopy, obtained at high spectral resolution, for 15 multiple-shell planetary nebulae. Most exhibit faint detached...
  • Publication
    On the Magnetic Field of Off-limb Spicules
    Determining the magnetic field related to solar spicules is vital for developing adequate models of these plasma jets, which are thought to play a key role in...
  • Publication
    On the Magnetic Nature of an Exploding Granule as Revealed by Sunrise/IMaX
    We study the photospheric evolution of an exploding granule observed in the quiet Sun at high spatial (∼0"3) and temporal (31.5 s) resolution by the imaging...
  • Publication
    On the Magnetic Nature of Quiet-Sun Chromospheric Grains
    Ca II K grains, i.e., intermittent, short-lived (about 1 minute), periodic (2-4 minutes), pointlike chromospheric brightenings, are considered to be the...
  • Publication
    On the Magnetism and Dynamics of Prominence Legs Hosting Tornadoes
    Solar tornadoes are dark vertical filamentary structures observed in the extreme ultraviolet associated with prominence legs and filament barbs. Their true...
  • Publication
    On the Metallicity of Star-forming Dwarf Galaxies
    We construct three extremely different scenarios of the star formation histories applicable to a sample of dwarf galaxies, based on either their present...