Journal: The Astrophysical Journal

  • Publication
    Spectroscopic Observations of Convective Patterns in the Atmospheres of Metal-poor Stars
    Convective line asymmetries in the optical spectrum of two metal-poor stars, Gmb 1830 and HD 140283, are compared to those observed for solar metallicity stars...
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    Spectroscopic Rotational Velocities of Brown Dwarfs
    We have obtained projected rotation velocities (vrotsini) of a sample of 19 ultracool dwarfs with spectral types in the interval M6.5-T8 using high-resolution...
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    Spectroscopy from Photometry Using Sparsity: The SDSS Case Study
    We explore whether medium-resolution stellar spectra can be reconstructed from photometric observations, taking advantage of the highly compressible nature of...
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    Spectroscopy from the Hubble Space Telescope Cosmic Origins Spectrograph of the Southern Nova-like BB Doradus in an Intermediate State
    We present a spectral analysis of the spectrum from the Hubble Space Telescope Cosmic Origins Spectrograph (HST/COS) of the southern VY Scl nova-like variable...
  • Publication
    Spectroscopy of 10 γ-Ray BL Lac Objects at High Redshift
    We present optical spectra with high signal-to-noise ratio of 10 BL Lac objects detected at GeV energies by the Fermi satellite (3FGL catalog), which previous...
  • Publication
    Spectroscopy of QUEST RR Lyrae Variables: The New Virgo Stellar Stream
    Eighteen RR Lyrae variables (RRLs) that lie in the ``12.4h clump'' identified by the Quasar Equatorial Survey Team (QUEST) have been observed spectroscopically...
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    Spectroscopy of the Lens Galaxy of Q0957+561A,B: Implications of a Possible Central Massive Dark Object
    We present new long-slit William Herschel Telescope spectroscopic observations of the lens galaxy G1 associated with the double-imaged QSO 0957+561A,B. The...
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    Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
    In this paper, we report the potential detection of a nonmonotonic radial rotation profile in a low-mass lower-luminosity giant star. For most low- and...
  • Publication
    Spiral Inflow Feeding the Nuclear Starburst in M83, Observed in Hα Emission with the GHαFaS Fabry-Perot Interferometer
    We present observations of the nearby barred starburst galaxy M83 (NGC 5236), with the new Fabry-Perot interferometer GHαFaS mounted on the 4.2 m William...