289 citations · 2.4k across the 53 of their papers we have counts for
53 papers
Assessing the Impact of Source Confusion for GREX-PLUS based on Deep JWST NIRCam Imaging
Yoshiaki Ono, Akio K. Inoue, Yuma Sugahara +9
We investigate the effects of source confusion expected in observations with GREX-PLUS, a JAXA L-class space infrared telescope mission candidate with a wide-field infrared camera…
Probing the origin of the two-component structure of broad line region by reverberation mapping of an extremely variable quasar
Shumpei Nagoshi, Fumihide Iwamuro, Satoshi Yamada +5
The physical origins of quasar components, such as the broad line region (BLR) and dust torus, remain under debate. To gain insights into them, we focused on Changing-State Quasars…
The relation between quasars' optical spectra and variability
Shumpei Nagoshi, Fumihide Iwamuro
This work aimed to find the relationship between quasars' optical variability and spectral features to reveal the regularity behind the random variation. It is known that quasar's…
Discovery of a new extreme changing-state quasar with 4 mag variation, SDSS J125809.31+351943.0
Shumpei Nagoshi, Fumihide Iwamuro, Kazuma Wada +1
We report the discovery of a quasar, SDSS J125809.31+351943.0 (J1258), which brightened in optical for 4 mag from 1983 to 2015, which is one of the largest quasar brightening event…
KOOLS--IFU: Kyoto Okayama Optical Low-dispersion Spectrograph with Optical-Fiber Integral Field Unit
Kazuya Matsubayashi, Kouji Ohta, Fumihide Iwamuro +6
Observations of transient objects, such as short gamma-ray bursts (GRBs) and electromagnetic counterparts of gravitational wave sources, require prompt spectroscopy. To carry out p…
Constraint on the inflow/outflow rates in star-forming galaxies at z~1.4 from molecular gas observations
Akifumi Seko, Kouji Ohta, Kiyoto Yabe +5
We constrain the rate of gas inflow into and outflow from a main-sequence star-forming galaxy at z~1.4 by fitting a simple analytic model for the chemical evolution in a galaxy to…