Journal: The Astrophysical Journal

  • Publication
    Oxygen in the Very Early Galaxy
    Oxygen abundances in a sample of ultra-metal-poor subdwarfs have been derived from measurements of the oxygen triplet at 7771-5 Å and OH lines in the near-UV...
  • Publication
    Oxygen Isotopic Ratios in Cool R Coronae Borealis Stars
    We investigate the relationship between R Coronae Borealis (RCB) stars and hydrogen-deficient carbon (HdC) stars by measuring precise 16O/18O ratios for five...
  • Publication
    Panchromatic Observations and Modeling of the HV Tau C Edge-on Disk
    We present new high spatial resolution (lsim0farcs1) 1-5 μm adaptive optics images, interferometric 1.3 mm continuum and 12CO 2-1 maps, and 350 μm, 2.8 and 3.3...
  • Publication
    Parsec-scale Dust Emission from the Polar Region in the Type 2 Nucleus of NGC 424
    Advancements in infrared (IR) interferometry open up the possibility to spatially resolve active galactic nuclei (AGNs) on the parsec-scale level and study the...
  • Publication
    Pattern Speeds of Bars and Spiral Arms from Hα Velocity Fields
    We have applied the Tremaine-Weinberg method to 10 late-type barred spiral galaxies using data cubes, in Hα emission, from the FaNTOmM and GHAFAS Fabry-Perot...
  • Publication
    Peculiar Transverse Velocities of Galaxies from Quasar Microlensing. Tentative Estimate of the Peculiar Velocity Dispersion at z ~ 0.5
    We propose to use the flux variability of lensed quasar images induced by gravitational microlensing to measure the transverse peculiar velocity of lens...
  • Publication
    Peering into the Dark Side: Magnesium Lines Establish a Massive Neutron Star in PSR J2215+5135
    New millisecond pulsars (MSPs) in compact binaries provide a good opportunity to search for the most massive neutron stars. Their main-sequence companion stars...
  • Publication
    Periodic Radio and Hα Emission from the L Dwarf Binary 2MASSW J0746425+200032: Exploring the Magnetic Field Topology and Radius Of An L Dwarf
    We present an 8.5 hr simultaneous radio, X-ray, UV, and optical observation of the L dwarf binary 2MASSW J0746425+200032. We detect strong radio emission...
  • Publication
    Periodic Very High Energy γ-Ray Emission from LS I +61°303 Observed with the MAGIC Telescope
    The MAGIC collaboration has recently reported the discovery of γ-ray emission from the binary system LS I +61°303 in the TeV energy region. Here we present new...