Journal: Publications of the Astronomical Society of Japan

  • Publication
    A possible shutting-down event of mass accretion in an active galactic nucleus at z ∼ 1.8
    We present the discovery of a large gradual apparent fading event in optical and near-infrared wavelengths in a quasar at by a factor of (in optical) over a...
  • Publication
    A significant hardening and rising shape detected in the MeV/GeV νFν spectrum from the recently discovered very-high-energy blazar S4 0954+65 during the bright optical flare in 2015 February
    We report on Fermi Large Area Telescope (LAT) and multi-wavelength results on the recently discovered very-high-energy (VHE, E > 100 GeV) blazar S4 0954+65 (z =...
  • Publication
    A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 508
    We report the near-infrared radial velocity (RV) discovery of a super-Earth planet on a 10.77 d orbit around the M4.5 dwarf Ross 508 (J mag = 9.1). Using...
  • Publication
    Blue supergiants as a progenitor of intermediate-luminosity red transients
    The current perspective about the explosions of massive hydrogen-rich blue supergiants is that they resemble SN 1987A. These so-called peculiar Type II...
  • Publication
    Crimson Behemoth: A massive clumpy structure hosting a dusty AGN at z=4.91
    The current paradigm for the co-evolution of galaxies and their supermassive black holes postulates that dust-obscured active galactic nuclei (AGNs) represent a...
  • Publication
    Doppler tomographic measurement of the nodal precession of WASP-33b
    WASP-33b is a retrograde hot Jupiter with a period of 1.2 d orbiting a rapidly rotating and pulsating A-type star. A previous study found that the transit chord...
  • Publication
    First detection of two superoutbursts during the rebrightening phase of a WZ Sge-type dwarf nova: TCP J21040470+4631129
    We report on photometric and spectroscopic observations and analysis of the 2019 superoutburst of TCP J21040470+4631129. This object showed a 9 mag...
  • Publication
    Hinode Observations of Horizontal Quiet Sun Magnetic Flux and the ``Hidden Turbulent Magnetic Flux''
    We present observations of magnetic fields of the very quiet Sun near disk center using the Spectro-Polarimeter of the Solar Optical Telescope aboard the Hinode...
  • Publication
    Interstellar Gas Mass Functions: Fractality and Scale Dependence
    We present a theoretical model for the observed mass functions (MF's) of interstellar clouds, and test it by comparison with interferometrically observed MF's...