Yuko Kakazu

Deep Spectroscopy of Ultra-Strong Emission Line Galaxies (2009)

Hu, Esther M., Cowie, Lennox L., Kakazu, Yuko, Barger, Amy J.

Ultra strong emission-line galaxies (USELs) with extremely high equivalent widths (EW(H beta) > 30A) can be used to pick out galaxies of extremely low metallicity in the z=0-1 redshift range. Large...

Mapping the Youngest Galaxies to Redshift One (2007)

Kakazu, Yuko, Cowie, Lennox L., Hu, Esther M.

We describe results of a narrow band search for ultra-strong emission line galaxies (USELs) with EW(H beta) > 30 A. 542 candidate galaxies are found in a half square degree survey using two ~100...

The Stellar Population of Lyman-alpha Emitting Galaxies at z ~ 5.7 (2006)

Lai, Kamson, Huang, Jia-Sheng, Fazio, Giovanni, Cowie, Lennox L., Hu, Esther M., Kakazu, Yuko

We present a study of three Lyman-alpha emitting galaxies (LAEs), selected via a narrow-band survey in the GOODS northern field, and spectroscopically confirmed to have redshifts of z ~ 5.65. Using...

Spectroscopic Studies of z~5.7 and z~6.5 Galaxies: Implications for Reionization (2005)

Hu, Esther M., Cowie, Lennox L., Capak, Peter, Kakazu, Yuko

The recent development of large, complete samples which identify high-redshift galaxies at z~5.7 and z~6.5 from deep, wide-field surveys provides detailed information on the earliest galaxies, their...

The discovery of a very narrow line star-forming object at a redshift of 5.66 (2003)

Taniguchi, Yoshiaki, Ajiki, Masaru, Murayama, Takashi, Nagao, Tohru, Veilleux, Sylvain, Sanders, David B., ...

SDSSp J104433.04$-$012502.2 at $z=5.74$ is Gravitationally Magnified by an Intervening Galaxy (2002)

Shioya, Yasuhiro, Taniguchi, Yoshiaki, Murayama, Takashi, Ajki, Masaru, Nagao, Tohru, Fujita, Shinobu S., ...

During the course of our optical deep survey program on L$\alpha$ emitters at $z \approx 5.7$ in the sky area surrounding the quasar SDSSp J104433.04$-$012502.2 at $z=5.74$, we found that a faint...

Effects of a burst of formation of first-generation stars on the evolution of galaxies (2002)

Shioya, Yasuhiro, Taniguchi, Yoshiaki, Murayama, Takashi, Nishiura, Shingo, Nagao, Tohru, Kakazu, Yuko

First-generation (Population III) stars in the universe play an important role inearly enrichment of heavy elements in galaxies and intergalactic medium and thus affect the history of galaxies. The...

The Nature of the faint far-infrared extragalactic source population: Optical/NIR and radio follow-up observations of ISOPHOT deep-field sources using Keck, Subaru, and VLA telescopes (2002)

Kakazu, Yuko, Sanders, D. B., Joseph, R. D., Cowie, L. L., Murayama, T., Taniguchi, Y., ...

We report on optical and near-infrared (NIR) follow-up spectroscopy of faint far-infrared (FIR) sources found in our deep FIR survey by Kawara et al.

On the Origin of Lyman$\alpha$ Blobs at High Redshift: Submillimetric Evidence for a Hyperwind Galaxy at z=3.1 (2001)

Taniguchi, Yoshiaki, Shioya, Yasuhiro, Kakazu, Yuko

The most remarkable class of high-redshift objects observed so far is extended Ly$\alpha$ emission-line blobs found in an over-density region at redshift 3.1. They may be either a dust-enshrouded,...

A Shock-Induced Pair of Superbubbles in the High-Redshift Powerful Radio Galaxy MRC 0406-244 (2001)

Taniguchi, Yoshiaki, Ohyama, Youichi, Murayama, Takashi, Yoshida, Michitoshi, Kashikawa, Nobunari, Iye, Masanori, ...

We present new optical spectroscopy of the high-redshift powerful radio galaxy MRC 0406$-$244 at redshift of 2.429. We find that the two extensions toward NW and SE probed in the rest-frame...