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Evidence of non-thermal X-ray emission from radio lobes of Cygnus A
Y. Yaji, M. S. Tashiro, N. Isobe +5
Using deep Chandra ACIS observation data for Cygnus A, we report evidence of non-thermal X-ray emission from radio lobes surrounded by a rich intra-cluster medium (ICM). The diffus…
Mass Function of Binary Massive Black Holes in Active Galactic Nuclei
Kimitake Hayasaki, Yoshihiro Ueda, Naoki Isobe
If the activity of active galactic nuclei (AGNs) is predominantly induced by major galaxy mergers, then a significant fraction of AGNs should harbor binary massive black holes in t…
Multiwavelength observation from radio through very-high-energy Gamma-ray of OJ 287 during the 12-year cycle flare in 2007
M. Hayashida, G. Bonnoli, A. Stamerra +10
We performed simultaneous multiwavelength observations of OJ 287 with the Nobeyama Millimeter Array for radio, the KANATA telescope and the KVA telescope for optical, the Suzaku sa…
Suzaku and Multi-wavelength Observations of OJ 287 during the Periodic Optical Outburst in 2007
Hiromi Seta, Naoki Isobe, Makoto S. Tashiro +10
Suzaku observations of the blazar OJ 287 were performed in 2007 April 10--13 and November 7--9. They correspond to a quiescent and a flaring state, respectively. The X-ray spectra…
Suzaku Observation of the Metallicity in the Interstellar Medium of NGC 4258
Saori Konami, Kosuke Sato, Kyoko Matsushita +7
The Suzaku X-ray satellite observed the nearby spiral galaxy NGC 4258 for a total good exposure time of 100 ks. We present an analysis of the Suzaku XIS data, in which we confirm t…