42 citations · 86 across the 4 of their papers we have counts for
7 papers · 1 filter
Integral field spectroscopy of four lensed quasars: analysis of their neighborhood and evidence for microlensing
T. Anguita, C. Faure, A. Yonehara +4
CONTEXT: Gravitationally lensed quasars constitute an independent tool to derive H0 through time-delays; they offer as well the opportunity to study the mass distribution and inter…
Origin of Chromatic Features in Multiple Quasars -Variability, Dust, or Microlensing -
Atsunori Yonehara, Hiroyuki Hirashita, Philipp Richter
Aims:In some of the lensed quasars, color differences between multiple images are observed at optical/near-infrared wavelengths. There are three possible origins of the color diffe…
Large-Scale Structure of Short-Lived LymanαEmitters
Ikkoh Shimizu, Masayuki Umemura, Atsunori Yonehara
Recently discovered large-scale structure of LyαEmitters (LAEs) raises a novel challenge to the cold dark matter (CDM) cosmology. The structure is extended over more than 50 Mpc at…
Constraining the size of the narrow line region in distant quasars
Atsunori Yonehara
We propose a proper method to measure the size of the narrow line region (NLR) in distant quasars. The apparent angular size of the NLR is, in general, too small to resolve technic…
Lyman Alpha Line Spectra of the First Galaxies: Dependence on Observed Direction to the Underlying CDM Filament
Masakazu A. R. Kobayashi, Hideyuki Kamaya, Atsunori Yonehara
The first galaxies in the Universe are built up where cold dark matter (CDM) forms large scale filamentary structure. Although the galaxies are expected to emit numerous Lya photon…
A New Method to Map Flares in Quasars
Atsunori Yonehara, Shin Mineshige, Yoh Takei +2
Recently, Chartas et al. (2001) detected a rapid X-ray flare in the gravitationally lensed, multiple image quasar RX J0911.4+0551. Dramatic events, such as rapid X-ray flares, are…