Publication type: Refereed

  • Publication
    Discovery of an Extraordinarily Massive Cluster of Red Supergiants
    We report the discovery of an extraordinarily massive young cluster of stars in the Galaxy, having an inferred total initial cluster mass comparable to the most...
  • Publication
    Discovery of an Extremely r-process-enhanced Thin-disk Star with [Eu/H] = +0.78
    Highly r-process-enhanced (RPE) stars are rare and usually metal poor ([Fe/H] < ‑1.0), and they mainly populate the Milky Way halo and dwarf galaxies. This...
  • Publication
    Discovery of an old nova remnant in the Galactic globular cluster M 22
    A nova is a cataclysmic event on the surface of a white dwarf in a binary system that increases the overall brightness by several orders of magnitude. Although...
  • Publication
    Discovery of an old nova shell surrounding the cataclysmic variable V1315 Aql
    Following our tentative discovery of a faint shell around V1315 Aql reported in Sahman et al., we undertook deep Hα imaging and intermediate-resolution...
  • Publication
    Discovery of an Ultra-diffuse Galaxy in the Pisces--Perseus Supercluster
    We report the discovery of DGSAT I, an ultra-diffuse, quenched galaxy located 10.°4 in projection from the Andromeda galaxy (M31). This low-surface brightness...
  • Publication
    Discovery of an X-Ray Photoionized Optical Nebula and a Radio Nebula Associated with the ULX NGC 4861 X-1
    We have conducted long-slit spectroscopic observations and analyzed archival radio data for the ultraluminous X-ray source (ULX) NGC 4861 X-1. Our spectral line...
  • Publication
    Discovery of Blue Hook Stars in the Massive Globular Cluster M54
    We present BV photometry centered on the globular cluster M54 (NGC 6715). The color-magnitude diagram clearly shows a blue horizontal branch extending...
  • Publication
    Discovery of Burst Oscillations in the Intermittent Accretion-Powered Millisecond Pulsar HETE J1900.1-2455
    We report the discovery of burst oscillations from the intermittent accretion-powered millisecond pulsar (AMP) HETE J1900.1-2455, with a frequency ~1 Hz below...
  • Publication
    Discovery of close binary central stars in the planetary nebulae NGC 6326 and NGC 6778
    We present observations proving the close binary nature of the central stars belonging to the planetary nebulae (PNe) NGC 6326 and NGC 6778. Photometric...