Search Publications
An X-Ray Detected Group of Quiescent Early-Type Galaxies at z = 1.6 in the Chandra Deep Field South
Brandt, William N.; Mulchaey, John S.; Ueda, Yoshihiro +6 more
We report the discovery of an X-ray group of galaxies located at a high redshift of
X-Ray and Optical Monitoring of a Gamma-Ray-Emitting Radio Galaxy, NGC 1275
Fukazawa, Yasushi; Yamazaki, Syoko; Sasada, Mahito +7 more
We performed monitoring observations of a gamma-ray-emitting radio galaxy, NGC 1275, in the X-ray and optical bands with the Suzaku/XIS, Kanata telescope, and the Okayama telescope. The X-ray flux of the nucleus was estimated by imaging spectroscopy in the hard X-ray band. In the optical band, a continuum flux, a broad Hα line flux, and the polari…
An X-Ray Study of the Galactic-Scale Starburst-Driven Outflow in NGC 253
Yamasaki, Noriko Y.; Mitsuishi, Ikuyuki; Takei, Yoh
The X-ray properties of hot interstellar gas in a bright, nearby edge-on starburst galaxy, NGC 253, were investigated so as to gain a further understanding of starburst-driven outflow activity by utilizing XMM-Newton and Suzaku. Spectroscopic analyses for three regions of the galaxy characterized by multiwavelength observations, i.e., the superwin…
Distribution of Si, Fe, and Ni in the Intracluster Medium of the Coma Cluster
Sato, Kosuke; Matsushita, Kyoko; Sato, Takuya +1 more
We studied the distributions of Si, Fe, and Ni in the intracluster medium (ICM) of the Coma cluster, one of the largest clusters in the nearby universe, using XMM-Newton data up to 0.5 r180 and Suzaku data of the central region up to 0.16 r180. Using the flux ratios of the Lyα line of H-like Si and the 7.8 keV line blend to t…
Suzaku Detection of Thermal X-Ray Emission Associated with the Western Radio Lobe of Fornax A
Tashiro, Makoto S.; Inoue, Susumu; Seta, Hiromi
We present the results of X-ray mapping observations of the western radio lobe of the Fornax A galaxy, using the X-ray Imaging Spectrometer (XIS) onboard the Suzaku satellite with a total exposure time of 327 ks. The purpose of this study is to investigate the nature and spatial extent of the diffuse thermal emission around the lobe by exploiting …
An X-Ray Counterpart of HESS J1427-608 Discovered with Suzaku
Dotani, Tadayasu; Terada, Yukikatsu; Matsumoto, Hironori +9 more
We report on the discovery of an X-ray counterpart of the unidentified very high-energy gamma-ray source HESS J1427-608. In the sky field coincident with HESS J1427-608, an extended source was found in the 2-8 keV band, and was designated as Suzaku J1427-6051. Its X-ray radial profile has an extension of σ = 0.'9 ± 0.'1 if approximated by a Gaussi…
Two Power-Law States of the Ultraluminous X-Ray Source IC 342 X-1
Isobe, Naoki; Kubota, Aya; Mineshige, Shin +3 more
In order to elucidate the emission properties of ultraluminous X-ray sources (ULXs) during their power-law (PL) state, we examined long-term X-ray spectral data of IC 342 X-1 during its PL state by using our own Suzaku data and archival data by XMM-Newton, Chandra, and Swift observations. The PL state of this source seems to be classified into two…
X-Ray Observation of the Galactic Supernova Remnant G355.6-0.0 with Suzaku
Koyama, Katsuji; Ota, Naomi; Yamauchi, Shigeo +1 more
We present results of the Galactic supernova remnant (SNR) G355.6-0.0 observed with Suzaku. We resolved diffuse emission detected with ASCA into two objects, G355.6-0.0 and a point-like source, Suzaku J173530-3236. The X-ray emission from G355.6-0.0 exhibits a center-filled morphology within the radio shell. The X-ray spectrum is well-represented …
Detection of a 522 s Pulsation from the Transient X-Ray Source Suzaku J0102.8-7204 (SXP 523) in the Small Magellanic Cloud
Miller, Eric D.; Tsujimoto, Masahiro; Wada, Qazuya +1 more
During a routine calibration observation of 1E 0102.2-7219 in the Small Magellanic Cloud (SMC), carried out in 2012 October for the Suzaku satellite, we detected a transient X-ray source at (RA, Dec) = (01h 02m47s, - 72°04m54s) in the equinox J2000.0 with a positional uncertainty of ∼1.4". We …
Metals in the Intracluster Medium of MS 1512.4+3647 Observed with Suzaku: Implications for the Metal Enrichment History
Sato, Kosuke; Tashiro, Makoto S.; Ohashi, Takaya +5 more
The cluster of galaxies MS 1512.4+3647 (z = 0.372) was observed with Suzaku for 270 ks. Besides the Fe abundance, the abundances of Mg, Si, S, and Ni were separately determined for the first time in a medium redshift cluster (z > 0.3). The derived abundance pattern of MS 1512.4+3647 is consistent with those of nearby clusters, suggesting that t…