Journal: The Astrophysical Journal

  • Publication
    Physical Properties of Spicules from Simultaneous Spectropolarimetric Observations of He I and Ca II Lines
    We present full Stokes observations from SPINOR (Spectro-Polarimeter for INfrared and Optical Regions, at the Dunn Solar Telescope) in the Ca II infrared...
  • Publication
    Physical Properties of the Solar Magnetic Photosphere under the MISMA Hypothesis. II. Network and Internetwork Fields at the Disk Center
    This paper is the second in a series that models photospheric magnetic structures in terms of atmospheres having optically thin fluctuations of magnetic field...
  • Publication
    Physical Properties of the Solar Magnetic Photosphere under the MISMA Hypothesis. III. Sunspot at Disk Center
    Small-scale fluctuations of magnetic field and velocity may be responsible for the Stokes asymmetries observed in all photospheric magnetic structures (the...
  • Publication
    Physically Motivated Fit to Mass Surface Density Profiles Observed in Galaxies
    Polytropes have gained renewed interest because they account for several seemingly disconnected observational properties of galaxies. Here we study whether...
  • Publication
    Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way
    This paper presents a homogeneous study of abundances in a sample of 79 northern Galactic planetary nebulae (PNe) whose morphological classes have been...
  • Publication
    Planets around the K-giants BD+20 274 and HD 219415
    We present the discovery of planet-mass companions to two giant stars by the ongoing Penn State-Toruń Planet Search conducted with the 9.2 m Hobby-Eberly...
  • Publication
    Plasma Jets and Eruptions in Solar Coronal Holes: A Three-dimensional Flux Emergence Experiment
    A three-dimensional (3D) numerical experiment of the launching of a hot and fast coronal jet followed by several violent eruptions is analyzed in detail. These...
  • Publication
    Polar Field Reversal Observations with Hinode
    We have been monitoring yearly variation in the Sun's polar magnetic fields with the Solar Optical Telescope aboard Hinode to record their evolution and...
  • Publication
    Polarimetry toward the IRAS Vela Shell. II. Extinction and Magnetic Fields
    We explore correlations between visual extinction and polarization along the western side of the Infrared Astronomical Satellite (IRAS) Vela Shell using a...