Journal: The Astrophysical Journal

  • Publication
    Using the Hanle Effect in Mg II k to Quantify the Open Flux above the Solar Poles
    We test the use of the Mg II resonant lines for measurement of the magnetic field at the top of the chromosphere of polar coronal holes (CHs). The Hanle effect...
  • Publication
    Variability Survey in the CoRoT SRa01 Field: Implications of Eclipsing Binary Distribution on Cluster Formation in NGC 2264
    Time-series photometry of the CoRoT field SRa01 was carried out with the Berlin Exoplanet Search Telescope II in 2008/2009. A total of 1161 variable stars were...
  • Publication
    Variable Stars in Local Group Galaxies. III. And VII, NGC 147, and NGC 185: Insight into the Building Blocks of the M31 Halo
    We present the discovery of 1568 RR Lyrae stars in three of the most luminous M31 satellites: And VII (573), NGC 147 (177), and NGC 185 (818). We use their...
  • Publication
    Variable Stars in Local Group Galaxies. VI. The Isolated Dwarfs VV 124 and KKr 25
    We present the discovery of variable stars in two isolated dwarf galaxies in the outskirts of the Local Group, VV 124 and KKr 25, using observations with the...
  • Publication
    Variable Very High Energy γ-Ray Emission from Markarian 501
    The blazar Mrk 501 was observed at energies above 0.10 TeV with the MAGIC Telescope from 2005 May through July. The high sensitivity of the instrument enabled...
  • Publication
    Variation of Galactic Bar Length with Amplitude and Density as Evidence for Bar Growth over a Hubble Time
    Ks-band images of 20 barred galaxies show an increase in the peak amplitude of the normalized m=2 Fourier component with the R25-normalized radius at this peak...
  • Publication
    Vegetation Signature in the Observed Globally Integrated Spectrum of Earth Considering Simultaneous Cloud Data: Applications for Extrasolar Planets
    A series of missions will be launched over the next few decades that will be designed to detect and characterize extrasolar planets around nearby stars. These...
  • Publication
    Very High Energy Gamma-Ray Observations of Strong Flaring Activity in M87 in 2008 February
    M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a monitoring program of M87, a rapid flare in VHE gamma-rays was...
  • Publication
    Very High Energy Gamma-Ray Radiation from the Stellar Mass Black Hole Binary Cygnus X-1
    We report on the results from the observations in the very high energy band (VHE; Eγ>=100 GeV) of the black hole X-ray binary (BHXB) Cygnus X-1. The...