277 citations · 3k across the 69 of their papers we have counts for
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Systematic X-ray Analysis of Radio Relic Clusters with SUZAKU
Hiroki Akamatsu, Hajime Kawahara
We perform a systematic X-ray analysis of six giant radio relics in four clusters of galaxies using the Suzaku satellite. The sample includes CIZA 2242.8-5301, Zwcl 2341.1-0000, th…
Mapping Clouds and Terrain of Earth-like Planets from Photometric Variability: Demonstration with Planets in Face-on Orbits
Hajime Kawahara, Yuka Fujii
We develop an inversion technique of annual scattered light curves to sketch a two-dimensional albedo map of exoplanets in face-on orbits. As a test-bed for future observations of…
ORIGIN: Metal Creation and Evolution from the Cosmic Dawn
J. W. den Herder, L. Piro, T. Ohashi +156
ORIGIN is a proposal for the M3 mission call of ESA aimed at the study of metal creation from the epoch of cosmic dawn. Using high-spectral resolution in the soft X-ray band, ORIGI…
Colors of a Second Earth II: Effects of Clouds on Photometric Characterization of Earth-like Exoplanets
Yuka Fujii, Hajime Kawahara, Yasushi Suto +4
As a test-bed for future investigations of directly imaged terrestrial exoplanets, we present the recovery of the surface components of the Earth from multi-band diurnal light curv…
SUZAKU Observation of a New Merging Group of Galaxies at a Filamentary Junction
Hajime Kawahara, Hiroshi Yoshitake, Takahiro Nishimichi +1
We report on a new merging group of galaxies, Suzaku J1552+2739 at z ~ 0.08 revealed by a SUZAKU observation. The group was found by observing a junction of galaxy filaments optica…