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Is There an Advection-Dominated Accretion Flow in Radio Galaxies with Double-Peaked Balmer Lines?
Tohru Nagao, Takashi Murayama, Yasuhiro Shioya +1
In order to examine the prediction that the broad-line radio galaxies (BLRGs) with double-peaked Balmer lines harbor an accretion disk characterized by an advection-dominated accre…
A Shock-Induced Pair of Superbubbles in the High-Redshift Powerful Radio Galaxy MRC 0406-244
Yoshiaki Taniguchi, Youichi Ohyama, Takashi Murayama +26
We present new optical spectroscopy of the high-redshift powerful radio galaxy MRC 0406244 at redshift of 2.429. We find that the two extensions toward NW and SE probed in the r…
Seyfert-Type Dependences of Narrow Emission-Line Ratios and Physical Properties of High-Ionization Nuclear Emission-Line Regions in Seyfert Galaxies
Tohru Nagao, Takashi Murayama, Yoshiaki Taniguchi
In order to examine how narrow emission-line flux ratios depend on the Seyfert type, we compiled various narrow emission-line flux ratios of 355 Seyfert galaxies from the literatur…
The [O III]4363 Emitting Region Obscured by Dusty Tori
Tohru Nagao, Takashi Murayama, Yoshiaki Taniguchi
The emission-line flux ratio of [O III]4363/[O III]5007 is a useful diagnostic for the ionization mechanism and physical properties of narrow-line regions in active galactic nuclei…
Nuclear obscuration in the high-ionization Seyfert 2 galaxy Tol 0109-383
K. Iwasawa, G. Matt, A. C. Fabian +5
We report the BeppoSAX detection of a hard X-ray excess in the X-ray spectrum of the classical high-ionization Seyfert 2 galaxy Tol0109-383. The X-ray emission of this source obser…