Search Publications
A fundamental plane in X-ray binary activity of external galaxies
Ueda, Yoshihiro; Inoue, Yoshiyuki; Yabe, Kiyoto
We construct a new catalog of extragalactic X-ray binaries (XRBs) by matching the latest Chandra source catalog with local galaxy catalogs. Our XRB catalog contains 4430 XRBs hosted by 237 galaxies within ~130 Mpc. As XRBs dominate the X-ray activity in galaxies, the catalog enables us to study the correlations between the total X-ray luminosity o…
A study of the accretion mechanisms of the high-mass X-ray binary IGR J00370+6122
Fukazawa, Yasushi; Makishima, Kazuo; Takahashi, Hiromitsu +1 more
IGR J00370+6122 is a high-mass X-ray binary with a B1 Ib primary star and a companion suggested to be a neutron star because of the detection of a 346 s pulsation in a one-off 4 ks observation. To better understand the nature of the compact companion, the present work performs timing and spectral studies of the X-ray data of this object, taken wit…
Suzaku observations of Jovian diffuse hard X-ray emission
Miyoshi, Yoshizumi; Ezoe, Yuichiro; Ishikawa, Kumi +6 more
We report on results of systematic analyses of the entire three X-ray data sets of Jupiter taken by Suzaku in 2006, 2012, and 2014. Jovian diffuse hard X-ray emission was discovered by Suzaku in 2006 when the solar activity went toward its minimum. The diffuse emission was spatially consistent with the Jovian inner magnetosphere and was spectrally…
Signatures of large-scale cold fronts in the optically-selected merging cluster HSC J085024+001536
Oguri, Masamune; Fujimoto, Ryuichi; Okabe, Nobuhiro +5 more
We represent a joint X-ray, weak-lensing, and optical analysis of the optically-selected merging cluster, HSC J085024+001536, from the Subaru HSC-SSP survey. Both the member galaxy density and the weak-lensing mass map show that the cluster is composed of south-east and north-west components. The two-dimensional weak-lensing analysis shows that th…