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New Near-Infrared Spectroscopy of the High Redshift Quasar B 1422+231 at z=3.62
T. Murayama, Y. Taniguchi, A. S. Evans +4
We present new near-infrared (rest-frame UV-to-optical) spectra of the high redshift, gravitationally lensed quasar B 1422+231 (z=3.62). Diagnostic emission lines of FeII, [OIII]50…
What Controls the Star Formation in Luminous Starburst Mergers ?
Yoshiaki Taniguchi, Youichi Ohyama
In order to understand what controls the star formation process in luminous starburst mergers (e.g., NGC 6240, Arp 220, and so on), we investigate observational properties of two s…
Optical Versus Mid-Infrared Spectroscopic Classification of Ultraluminous Infrared Galaxies
Yoshiaki Taniguchi, Akira Yoshino, Youichi Ohyama +1
The origin of huge infrared luminosities of ultraluminous infrared galaxies (ULIGs) is still in question. Recently, Genzel et al. made mid-infrared (MIR) spectroscopy of a large nu…
An Origin of the Huge Far-Infrared Luminosity of Starburst Mergers
Yoshiaki Taniguchi, Youichi Ohyama
Recently Taniguchi and Ohyama found that the higher CO to CO integrated intensity ratios at a transition =1--0, CO)CO) , in a sa…
Starburst-driven Starbursts in the Heart of Ultraluminous Infrared Galaxies
Yoshiaki Taniguchi, Neil Trentham, Yasuhiro Shioya
There is increasing evidence for the presence of blue super star clusters in the central regions of ultraluminous infrared galaxies like Arp 220. Ultraluminous galaxies are thought…
Dusty star forming galaxies at high redshift
A. J. Barger, L. L. Cowie, D. B. Sanders +5
The global star formation rate in high redshift galaxies, based on optical surveys, shows a strong peak at a redshift of z=1.5, which implies that we have already seen most of the…