Publication type: Refereed

  • 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...
  • Publication
    Discovery of disc truncations above the galaxies' mid-plane in Milky Way-like galaxies
    Disc truncations are the closest feature to an edge that galaxies have, but the nature of this phenomenon is not yet understood. In this paper we explore the...
  • Publication
    Discovery of Faint Double-peak Hα Emission in the Halo of Low Redshift Galaxies
    Aimed at the detection of cosmological gas being accreted onto galaxies in the local universe, we examined the Hα emission in the halo of 164 galaxies in the...
  • Publication
    Discovery of Four Apparently Cold Dusty Galaxies at z = 3.62─5.85 in the COSMOS Field: Direct Evidence of Cosmic Microwave Background Impact on High-redshift Galaxy Observables
    We report Atacama Large Millimeter Array (ALMA) observations of four high-redshift dusty star-forming galaxy candidates selected from far-infrared (FIR)...
  • Publication
    Discovery of Hα satellite emission in a low state of the SW Sextantis star BB Doradus
    BB Dor was observed during its low state in 2009. Signatures of both binary components are revealed in the average optical spectrum; no signature of accretion...
  • Publication
    Discovery of Kilohertz Quasi-periodic Oscillations and Shifted Frequency Correlations in the Accreting Millisecond Pulsar XTE J1807-294
    We report the discovery of twin kilohertz quasi-periodic oscillations (kHz QPOs) in the X-ray flux of XTE J1807-294, the fourth accreting millisecond pulsar...
  • Publication
    Discovery of long-period magnetic field oscillations and motions in isolated sunspots
    We analyse the temporal evolution of the inclination component of the magnetic field vector for the penumbral area of 25 isolated sunspots. Compared to previous...