Journal: The Astrophysical Journal

  • Publication
    Spectro-Polarimetric Imaging Reveals Helical Magnetic Fields in Solar Prominence Feet
    Solar prominences are clouds of cool plasma levitating above the solar surface and insulated from the million-degree corona by magnetic fields. They form in...
  • Publication
    Spectrophotometric Investigations of Blue Compact Dwarf Galaxies: Markarian 35
    We present results from a detailed spectrophotometric analysis of the blue compact dwarf galaxy Mrk 35 (Haro 3), based on deep optical (BVRI) and near-IR (JHK)...
  • Publication
    Spectrophotometric Observations of Blue Compact Dwarf Galaxies: Markarian 370
    We present results from a detailed spectrophotometric analysis of the blue compact dwarf galaxy (BCD) Mrk 370, based on deep UBVRI broadband and Hα narrowband...
  • Publication
    Spectropolarimetric Inversions of the Ca II 8498 and 8542 Å Lines in the Quiet Sun
    We study non-LTE inversions of the Ca II infrared triplet lines as a tool for inferring physical properties of the quiet Sun. The inversion code is successful...
  • Publication
    Spectropolarimetric Investigation of the Propagation of Magnetoacoustic Waves and Shock Formation in Sunspot Atmospheres
    Velocity oscillations in sunspot umbrae have been measured simultaneously in two spectral lines: the photospheric Si I λ10827 line and the chromospheric He I...
  • Publication
    Spectropolarimetric Observations of the Ca II λ8498 and λ8542 in the Quiet Sun
    The Ca II infrared triplet is one of the few magnetically sensitive chromospheric lines available for ground-based observations. We present spectropolarimetric...
  • Publication
    Spectropolarimetry of a Decaying Sunspot Penumbra
    We report on high angular resolution, high-precision spectropolarimetric measurements of a decaying sunspot. The spot gradually lost its penumbra during the...
  • Publication
    Spectropolarimetry of the Solar Mg II h and k Lines
    We report on spectropolarimetric observations across the Mg II h and k lines at 2800 Å made by the Ultraviolet Spectrometer and Polarimeter on board the Solar...
  • Publication
    Spectroscopic and Asteroseismic Analysis of the Secondary Clump Red Giant HD 226808
    In order to clarify the properties of the secondary clump star HD 226808 (KIC 5307747), we combined four years of data from Kepler space photometry with high...