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Why Can We Detect Quasar BR12020725 in Co ?
Chisato Ikuta, Nobuo Arimoto, Yoshiaki Sofue +1
We present CO luminosity evolution of both elliptical and spiral galaxies based on a galactic wind model and a bulge-disk model, respectively. We have found that the CO luminosity…
Does the Radiative Avalanche Fueling Work in Any Active Galactic Nuclei ?
Yoshiaki Taniguchi
Recently Umemura, Fukue, & Mineshige (1997) proposed the radiative avalanche fueling to active galactic nuclei; gas accretion is driven by radiation drag exerted by stellar radiati…
The Epoch of Major Star Formation in High-z Quasar Hosts
Yoshiaki Taniguchi, Nobuo Arimoto, Takashi Murayama +3
We present the results of our observing program on near infrared spectroscopy of high-redshift quasars which have been undertaken both at Kitt Peak National Observatory and at Maun…
Why Does NGC 1068 Have a More Powerful Active Galactic Nucleus than NGC 4258 ?
Takashi Murayama, Yoshiaki Taniguchi
The nuclear gas kinematics probed by water vapor maser emission has shown that two nearby active galaxies, NGC 1068 and NGC 4258, have a supermassive object in their nuclei and the…
The most Distant [OIII]-emitting Quasar PKS 1937-101 at redshift 3.8
Yoshiaki Taniguchi, Takashi Murayama, Kimiaki Kawara +1
We report the discovery of a high-z quasar with unambiguous [OIII]5007 emission; PKS 1937-101 at redshift 3.8. This quasar, however, shows little evidence for rest-frame ultraviole…
A New Superwind Wolf-Rayet Galaxy Mrk 1259
Y. Ohyama, Y. Taniguchi, R. Terlevich
We report the discovery of a starburst-driven wind (superwind) from the starburst nucleus galaxy Mrk 1259. The estimated number ratio of Wolf-Rayet (WR) to O stars amounts to ~0.09…