Journal: The Astrophysical Journal

  • Publication
    Outflows from Evolved Stars: The Rapidly Changing Fingers of CRL 618
    Our ultimate goal is to probe the nature of the collimator of the outflows in the pre-planetary nebula CRL 618. CRL 618 is uniquely suited for this purpose...
  • Publication
    Outflows of Very Ionized Gas in the Centers of Seyfert Galaxies: Kinematics and Physical Conditions
    Mid-resolution spectra are used to deduce the size and kinematics of the coronal region in a sample of Seyfert galaxies by means of observations of the [Fe XI]...
  • Publication
    Outside-In Disk Evolution in the Large Magellanic Cloud
    From the analysis of the color-magnitude diagrams and color functions of four wide LMC fields located from ~=2 to 6 kpc from the kinematic center of the LMC we...
  • Publication
    Overmassive Black Holes at Cosmic Noon: Linking the Local and the High-redshift Universe
    We report for the first time a sample of 12 supermassive black holes (SMBHs) hosted by low-mass galaxies at cosmic noon, i.e., in a redshift range consistent...
  • Publication
    Overview of the DESI Milky Way Survey
    We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak...
  • Publication
    Overview of the SDSS-IV MaNGA Survey: Mapping nearby Galaxies at Apache Point Observatory
    We present an overview of a new integral field spectroscopic survey called MaNGA (Mapping Nearby Galaxies at Apache Point Observatory), one of three core...
  • Publication
    Oxygen Abundances in Nearby FGK Stars and the Galactic Chemical Evolution of the Local Disk and Halo
    Atmospheric parameters and oxygen abundances of 825 nearby FGK stars are derived using high-quality spectra and a non-local thermodynamic equilibrium analysis...
  • Publication
    Oxygen Abundances in Unevolved Metal-poor Stars from Near-Ultraviolet OH Lines
    We have performed a detailed oxygen abundance analysis of 23 metal-poor (-3.0 [Fe/H] -0.3) unevolved halo stars and one giant through the OH bands in the near...
  • 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...