Journal: The Astrophysical Journal

  • Publication
    Jets, Knots, and Tails in Planetary Nebulae: NGC 3918, K1-2, and Wray 17-1
    We analyze optical images and high-resolution, long-slit spectra of three planetary nebulae that possess collimated, low-ionization features. NGC 3918 is...
  • Publication
    JWST Constraints on the UV Luminosity Density at Cosmic Dawn: Implications for 21 cm Cosmology
    An unprecedented array of new observational capabilities are starting to yield key constraints on models of the epoch of first light in the Universe. In this...
  • Publication
    JWST Photometric Time-delay and Magnification Measurements for the Triply Imaged Type Ia "SN H0pe" at z = 1.78
    Supernova (SN) SN H0pe is a gravitationally lensed, triply imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0...
  • Publication
    JWST/NIRCam Narrowband Survey of Paβ Emitters in the Spiderweb Protocluster at z = 2.16
    We report the initial result of our Paβ narrowband imaging on a protocluster with the JWST Near Infrared Camera (NIRCam). As NIRCam enables deep narrowband...
  • Publication
    JWST/NIRCam Paβ Narrowband Imaging Reveals Ordinary Dust Extinction for Hα Emitters within the Spiderweb Protocluster at z = 2.16
    We combine JWST/NIRCam and Subaru/MOIRCS dual Paβ+Hα narrowband imaging to trace the dust attenuation and the star formation activities of a sample of 43 Hα...
  • Publication
    Keck HIRES Spectroscopy of Extragalactic H II Regions: C and O Abundances from Recombination Lines
    We present very deep spectrophotometry of 14 bright extragalactic H II regions belonging to spiral, irregular, and blue compact galaxies. The data for 13...
  • Publication
    Keck NIRC Observations of Planetary-Mass Candidate Members in the σ Orionis Open Cluster
    We present K-band photometry and low-resolution near-infrared spectroscopy from 1.44 to 2.45 μm of isolated planetary-mass candidate members in the σ Orionis...
  • Publication
    Kelvin-Helmholtz Instability in Partially Ionized Compressible Plasmas
    The Kelvin-Helmholtz instability (KHI) has been observed in the solar atmosphere. Ion-neutral collisions may play a relevant role for the growth rate and...
  • Publication
    Kepler-21b: A 1.6 R Earth Planet Transiting the Bright Oscillating F Subgiant Star HD 179070
    We present Kepler observations of the bright (V = 8.3), oscillating star HD 179070. The observations show transit-like events which reveal that the star is...