Kazuhiro Shimasaku

High star formation activity in the central region of a distant cluster at z=1.46 (2009)

Hayashi, Masao, Kodama, Tadayuki, Koyama, Yusei, Tanaka, Ichi, Shimasaku, Kazuhiro, Okamura, Sadanori

We present an unbiased deep [OII] emission survey of a cluster XMMXCS J2215.9-1738 at z=1.46, the most distant cluster to date with a detection of extended X-ray emission. With wide-field optical and...

Stellar Populations of Lyman Alpha Emitters at z = 3 - 4 Based on Deep Large Area Surveys in the Subaru-SXDS/UKIDSS-UDS Field (2009)

Ono, Yoshiaki, Ouchi, Masami, Shimasaku, Kazuhiro, Akiyama, Masayuki, Dunlop, James, Farrah, Duncan, ...

We investigate the stellar populations of Lyman alpha emitters (LAEs) at z=3.1 and 3.7 in 0.65 deg^2 of the Subaru/XMM-Newton Deep Field, based on rest-frame UV-to-optical photometry obtained from...

Large Area Survey for z=7 Galaxies in SDF and GOODS-N: Implications for Galaxy Formation and Cosmic Reionization (2009)

Ouchi, Masami, Mobasher, Bahram, Shimasaku, Kazuhiro, Ferguson, Henry C., Fall, S. Michael, Ono, Yoshiaki, ...

We present results of our large-area survey for z'-band dropout galaxies at z=7 in a 1568 arcmin^2 sky area covering the SDF and GOODS-N fields. Combining our ultra-deep Subaru/Suprime-Cam z'- and...

Photometric H alpha and [O II] Luminosity Function of SDF and SXDF Galaxies: Implications for Future Baryon Oscillation Surveys (2009)

Sumiyoshi, Masanao, Totani, Tomonori, Oshige, Shunsuke, Glazebrook, Karl, Akiyama, Masayuki, Morokuma, Tomoki, ...

Efficient selection of emission line galaxies at z > 1 by photometric information in wide field surveys is one of the keys for future spectroscopic surveys to constrain dark energy using the baryon...

A Search for Molecular Gas toward a BzK-selected Star-forming Galaxy at z = 2.044 (2009)

Hatsukade, Bunyo, Iono, Daisuke, Motohara, Kentaro, Nakanishi, Kouichiro, Hayashi, Masao, Shimasaku, Kazuhiro, ...

We present a search for CO(3-2) emission in SDF-26821, a BzK-selected star-forming galaxy (sBzK) at z = 2.044, using the 45-m telescope of the Nobeyama Radio Observatory and the Nobeyama Millimeter...

Photometric H alpha and [O II] luminosity function of SDF and SXDF galaxies: implications for future baryon oscillation surveys (2009)

Sumiyoshi, Masanao, Totani, Tomonori, Oshige, Shunsuke, Glazebrook, Karl, Akiyama, Masayuki, Morokuma, Tomoki, ...

Efficient selection of emission line galaxies at z > 1 by photometric information in wide field surveys is one of the keys for future spectroscopic surveys to constrain dark energy using the baryon...

Photometric H alpha and [O II] luminosity function of SDF and SXDF galaxies: implications for future baryon oscillation surveys (2009)

Sumiyoshi, Masanao, Totani, Tomonori, Oshige, Shunsuke, Glazebrook, Karl, Akiyama, Masayuki, Morokuma, Tomoki, ...

Efficient selection of emission line galaxies at z > 1 by photometric information in wide field surveys is one of the keys for future spectroscopic surveys to constrain dark energy using the baryon...

Mapping dusty star formation in and around a cluster at z=0.81 by wide-field imaging with AKARI (2008)

Koyama, Yusei, Kodama, Tadayuki, Shimasaku, Kazuhiro, Okamura, Sadanori, Tanaka, Masayuki, Lee, Hyung Mok, ...

We present environmental dependence of dusty star forming activity in and around the cluster RXJ1716.4+6708 at z=0.81 based on wide-field and multi-wavelength observations with Suprime-Cam on the...

Discovery of a Giant Lya Emitter Near the Reionization Epoch (2008)

Ouchi, Masami, Ono, Yoshiaki, Egami, Eiichi, Saito, Tomoki, Oguri, Masamune, McCarthy, Patrick J., ...

We report the discovery of a giant Lya emitter (LAE) with a Spitzer/IRAC counterpart near the reionization epoch at z=6.595. The giant LAE is found from the extensive 1 deg^2 Subaru narrow-band...

A close relationship at z~2: submillimetre galaxies and BzK-selected galaxies (2008)

Takagi, Toshinobu, Ono, Yoshiaki, Shimasaku, Kazuhiro, Hanami, Hitoshi

We investigate the relationship between two massive star-forming galaxy populations at redshift z~ 2; i.e. submillimetre galaxies (SMGs) and BzK-selected galaxies (BzKs). Out of 60 SMGs found in the...

Overdensity of i'-Dropout Galaxies in the Subaru Deep Field: A Candidate Protocluster at z ~ 6 (2008)

Ota, Kazuaki, Kashikawa, Nobunari, Malkan, Matthew A., Iye, Masanori, Nakajima, Tadashi, Nagao, Tohru, ...

We investigate the sky distribution of z ~ 6 Lyman break galaxies selected as i'-dropouts having i' - z' > 1.45 down to z' < 26.5 in the Subaru Deep Field (SDF). We discover 37 i'-dropouts clustered...

The Subaru/XMM-Newton Deep Survey (SXDS) -VII. Clustering Segregation with Ultraviolet and Optical Luminosities of Lyman-Break Galaxies at z~3 (2008)

Yoshida, Makiko, Shimasaku, Kazuhiro, Ouchi, Masami, Sekiguchi, Kazuhiro, Furusawa, Hisanori, Okamura, Sadanori

We investigate clustering properties of Lyman-break galaxies (LBGs) at z~3 based on deep multi-waveband imaging data from optical to near-infrared wavelengths in the Subaru/XMM-Newton Deep Field. The...

Dependence of the Build-up of the Colour-Magnitude Relation on Cluster Richness at z ~ 0.8 (2007)

Koyama, Yusei, Kodama, Tadayuki, Tanaka, Masayuki, Shimasaku, Kazuhiro, Okamura, Sadanori

We present environmental dependence of the build-up of the colour-magnitude relation (CMR) at z ~ 0.8. It is well established that massive early-type galaxies exhibit a tight CMR in clusters up to at...

The Subaru/XMM-Newton Deep Survey (SXDS). IV. Evolution of Lya Emitters from z=3.1 to 5.7 in the 1 deg^2 Field: Luminosity Functions and AGN (2007)

Ouchi, Masami, Shimasaku, Kazuhiro, Akiyama, Masayuki, Simpson, Chris, Saito, Tomoki, Ueda, Yoshihiro, ...

We present luminosity functions (LFs) and various properties of Lya emitters (LAEs) at z=3.1, 3.7, and 5.7, in a 1 deg^2 sky of the Subaru/XMM-Newton Deep Survey (SXDS) Field. We obtain a photometric...

The Reionization and Galaxy Evolution Probed by z=7 Lyman Alpha Emitters (2007)

Ota, Kazuaki, Iye, Masanori, Kashikawa, Nobunari, Shimasaku, Kazuhiro, Kobayashi, Masakazu A. R., Totani, Tomonori, ...

We made a narrowband NB973 (bandwidth of 200A at 9755A) imaging of the Subaru Deep Field (SDF) and found two z=7 Lyman alpha emitter (LAE) candidates down to NB973=24.9. Carrying out deep follow-up...

Wide-field Survey around Local Group Dwarf Spheroidal Galaxy Leo II: Spatial Distribution of Stellar Content (2007)

Komiyama, Yutaka, Doi, Mamoru, Furusawa, Hisanori, Hamabe, Masaru, Imi, Katsumi, Kimura, Masahiko, ...

We carried out a wide-field V, I imaging survey of the Local Group dwarf spheroidal galaxy Leo II using the Subaru Prime Focus Camera on the 8.2-m Subaru Telescope. The survey covered an area of...

Deep Spectroscopy of Systematically Surveyed Extended Lyman-alpha Sources at z~3-5 (2007)

Saito, Tomoki, Shimasaku, Kazuhiro, Okamura, Sadanori, Ouchi, Masami, Akiyama, Masayuki, Yoshida, Michitoshi, ...

Spatially extended Ly-alpha sources that are faint and/or compact in coninuum are candidates for extremely young (~< 10^7 yrs) galaxies at high redshifts. We present medium-resolution (R~2000)...

The Luminosity Function and Star Formation Rate between Redshifts of 0.07 and 1.47 for Narrow-band Emitters in the Subaru Deep Field (2006)

Ly, Chun, Malkan, Matt A., Kashikawa, Nobunari, Shimasaku, Kazuhiro, Doi, Mamoru, Nagao, Tohru, ...

Abridged: Subaru Deep Field line-emitting galaxies in four narrow-band filters at low and intermediate redshifts are presented. Broad-band colors, follow-up optical spectroscopy, and multiple NB...

Luminosity Functions of Lyman-Break Galaxies at z~4 and 5 in the Subaru Deep Field (2006)

Yoshida, Makiko, Shimasaku, Kazuhiro, Kashikawa, Nobunari, Ouchi, Masami, Okamura, Sadanori, Team, The SDF Project

We investigate the luminosity functions of Lyman-break galaxies (LBG) at z~4 and 5 based on the optical imaging data obtained in the Subaru Deep Field Project. Three samples of LBGs in a contiguous...

Systematic Survey of Extended Lyman-alpha Sources over z~3-5 (2006)

Saito, Tomoki, Shimasaku, Kazuhiro, Okamura, Sadanori, Ouchi, Masami, Akiyama, Masayuki, Yoshida, Michitoshi

Spatially extended Ly-alpha sources which are faint and compact in coninuum are candidates for extremely young galaxies (age of ~

Clustering of Lyman Break Galaxies at z=4 and 5 in The Subaru Deep Field: Luminosity Dependence of The Correlation Function Slope (2005)

Kashikawa, Nobunari, Yoshida, Makiko, Shimasaku, Kazuhiro, Nagashima, Masahiro, Yahagi, Hideki, Ouchi, Masami, ...

We explored the clustering properties of Lyman Break Galaxies (LBGs) at z=4 and 5 with an angular two-point correlation function on the basis of the very deep and wide Subaru Deep Field data. We...

The Number Density of Old Passively-Evolving Galaxies at z=1 in the Subaru/XMM-Newton Deep Survey Field (2005)

Yamada, Toru, Kodama, Tadayuki, Akiyama, Masayuki, Furusawa, Hisanori, Iwata, Ikuru, Kajisawa, Masaru, ...

We obtained the number counts and the rest-frame B-band luminosity function of the color-selected old passively-evolving galaxies (OPEGs) at z=1 with very high statistical accuracy using a large and...

The Build-up of the Colour-Magnitude Relation as a Function of Environment (2005)

Tanaka, Masayuki, Kodama, Tadayuki, Arimoto, Nobuo, Okamura, Sadanori, Umetsu, Keiichi, Shimasaku, Kazuhiro, ...

We discuss the environmental dependence of galaxy evolution based on deep panoramic imaging of two distant clusters taken with Suprime-Cam as part of the PISCES project. By combining with the SDSS...

Discovery of a Large Scale Clumpy Structure around the Lynx Supercluster at z~1.27 (2004)

Nakata, Fumiaki, Kodama, Tadayuki, Shimasaku, Kazuhiro, Doi, Mamoru, Furusawa, Hisanori, Hamabe, Masaru, ...

We report the discovery of a probable large scale structure composed of many galaxy clumps around the known twin clusters at z=1.26 and z=1.27 in the Lynx region. Our analysis is based on deep,...

The Environmental Dependence of Galaxy Properties in the Local Universe: Dependence on Luminosity, Local Density, and System Richness (2004)

Tanaka, Masayuki, Goto, Tomotsugu, Okamura, Sadanori, Shimasaku, Kazuhiro, Brinkman, Jon

We investigate the environmental dependence of star formation and the morphology of galaxies in the local universe based on a volume-limited sample (0.030

The Halpha Luminosity Function of the Galaxy Cluster Abell 521 at z = 0.25 (2003)

Umeda, Kazuyoshi, Yagi, Masafumi, Yamada, Sanae F., Taniguchi, Yoshiaki, Shioya, Yasuhiro, Murayama, Takashi, ...

We present an optical multicolor-imaging study of the galaxy cluster Abell 521 at $z = 0.25$, using Suprime-Cam on the Subaru Telescope, covering an area of $32 \times 20$ arcmin$^2$ ($9.4 \times 5.8...

Properties of host haloes of Lyman-break galaxies and Lyman-alpha Emitters from their number densities and angular clustering (2003)

Hamana, Takashi, Ouchi, Masami, Shimasaku, Kazuhiro, Kayo, Issha, Suto, Yasushi

We explore empirical relations between three different populations of high-redshift galaxies and their hosting dark halos employing the halo model approach. Specifically we consider Lyman-break...

Luminosity Function of Morphologically Classified Galaxies in the Sloan Digital Sky Survey (2002)

Nakamura, Osamu, Fukugita, Masataka, Yasuda, Naoki, Loveday, Jon, Brinkmann, Jon, Schneider, Donald P., ...

The morphological dependence of the luminosity function is studied using a sample containing approximately 1500 bright galaxies classified into Hubble types by visual inspections for a homogeneous...

Subaru Prime Focus Camera -- Suprime-Cam -- (2002)

Miyazaki, Satoshi, Komiyama, Yutaka, Sekiguchi, Maki, Okamura, Sadanori, Doi, Mamoru, Furusawa, Hisanori, ...

We have built an 80-mega pixels (10240 X 8192) mosaic CCD camera, called Suprime-Cam, for the wide-field prime focus of the 8.2 m Subaru telescope. Suprime-Cam covers a field of view 34' X 27', a...

The Galaxy Luminosity Function and Luminosity Density at Redshift z=0.1 (2002)

Blanton, Michael R., Hogg, David W., Brinkmann, J., Connolly, Andrew J., Csabai, Istvan, Bahcall, Neta A., ...

Using a catalog of 147,986 galaxy redshifts and fluxes from the Sloan Digital Sky Survey (SDSS) we measure the galaxy luminosity density at z=0.1 in five optical bandpasses corresponding to the SDSS...

A Search for Lyman alpha Emitters at Redshift 3.7 (2002)

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

We present the results of a survey for emission-line objects based on optical intermediate-band ($\lambda_{\rm c}$ = 5736 \AA ~ and $\Delta\lambda$ = 280 \AA) and broad-band ($B$, $V$, $R$, and...

Subaru Deep Survey III. Evolution of Rest-Frame Luminosity Functions Based on the Photometric Redshifts for A K'-band Selected Galaxy Sample (2002)

Kashikawa, Nobunari, Takata, Tadafumi, Ohyama, Youichi, Yoshida, Michitoshi, Maihara, Toshinori, Iwamuro, Fumihide, ...

We have constructed a very deep K'-selected multicolor BVRIz'JK' sample of 439 field galaxies. Photometric redshifts for sample galaxies were estimated. The overall redshift distribution N(z) for the...

ERO R1 in CL0939+4713 field - Evidence for an S0-like galaxy at z \sim 1.5 (2002)

Iye, Masanori, Shimasaku, Kazuhiro, Miyazaki, Satoshi, Imanishi, Masatoshi, Kashikawa, Nobunari, Kodama, Tadayuki, ...

We present further observations of the extremely red object ERO J094258+4659.2, identified by \citet{iye00} as ERO R1 in their deep images of the cluster A851. We estimate its redshift independently...

Sloan Digital Sky Survey: Early data release (2002)

Stoughton, Chirs, Lupton, Rpbert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott, Castander, Francsico J., ...

The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of 10 6 galaxies, 100,000...

Galaxy Population in a Cluster of Galaxies around the Radio Galaxy 3C 324 at z=1.2 (2001)

Nakata, Fumiaki, Kajisawa, Masaru, Yamada, Toru, Kodama, Tadayuki, Shimasaku, Kazuhiro, Tanaka, Ichi, ...

We discuss the properties of galaxies around the radio galaxy 3C 324 at z=1.2 based on BVRIK' multi-band imaging data. We have applied a photometric-redshift technique to objects in the 3C 324 field,...

Discovery of Very Extended Emission-Line Region around the Seyfert 2 Galaxy NGC 4388 (2001)

Yoshida, Michitoshi, Yagi, Masafumi, Okamura, Sadanori, Aoki, Kentaro, Ohyama, Youichi, Komiyama, Yutaka, ...

We found a very large, 35 kpc, emission-line region around the Seyfert type 2 galaxy NGC 4388, using deep narrow-band imaging with the prime focus camera (Suprime-Cam) of the Subaru telescope. This...

Statistical Properties of Lyman Break Galaxies at z~4 (2001)

Ouchi, Masami, Shimasaku, Kazuhiro, Okamura, Sadanori, Doi, Mamoru, Furusawa, Hisanori, Hamabe, Masaru, ...

We study the luminosity function and the correlation function of about 1200 z~4 Lyman break galaxies (LBGs) with i' 3 sigma significance level. Interpreting this as being due to galaxy mergers, we...

Galaxy Number Counts from the Sloan Digital Sky Survey Commissioning Data (2001)

Yasuda, Naoki, Fukugita, Masataka, Narayanan, Vijay K., Lupton, Robert H., Strateva, Iskra, Strauss, Michael A., ...

We present bright galaxy number counts in five broad bands ($u', g', r', i', z'$) from imaging data taken during the commissioning phase of the Sloan Digital Sky Survey (SDSS). The counts are derived...

Evolution of the Blue Luminosity-to-Baryon Mass Ratio of Clusters of Galaxies (2000)

Shimasaku, Kazuhiro

We derive the ratio of total blue luminosity to total baryon mass, LB/Mb, for massive (Mgas at the Abell radius is \ge 1 \times 10^{13} h^{-2.5} \Msolar) clusters of galaxies up to z \simeq 1 from...

New Improved Photometric Redshifts of Galaxies in the HDF (1999)

Furusawa, Hisanori, Shimasaku, Kazuhiro, Doi, Mamoru, Okamura, Sadanori

We report new improved photometric redshifts of 1048 galaxies in the Hubble Deep Field (HDF). A standard chi^2 minimizing method is applied to seven-color UBVIJHK photometry by Fernandez-Soto,...

Probing the evolution of early-type galaxies using multi-colour number counts and redshift distributions (1999)

Nakata, Fumiaki, Shimasaku, Kazuhiro, Doi, Mamoru, Kashikawa, Nobunari, Kawasaki, Wataru, Komiyama, Yutaka, ...

We investigate pure luminosity evolution models for early-type (elliptical and S0) galaxies (i.e., no number density change or morphology transition), and examine whether these models are consistent...

Retrieving Bulge and Disk Parameters and Asymptotic Magnitudes from the Growth Curves of Galaxies (1998)

Okamura, Sadanori, Yasuda, Naoki, Shimasaku, Kazuhiro, Yagi, Masafumi, Weinberg, David H.

We show that the growth curves of galaxies can be used to determine their bulge and disk parameters and bulge-to-total luminosity ratios, in addition to their conventional asymptotic magnitudes,...

An Objective and Automatic Cluster Finder: An Improvement of the Matched-Filter Method (1997)

Kawasaki, Wataru, Shimasaku, Kazuhiro, Doi, Mamoru, Okamura, Sadanori

We describe an objective and automated method for detecting clusters of galaxies from optical imaging data. This method is a variant of the so-called `matched-filter' technique pioneered by Postman...

Measuring the Density Fluctuation From the Cluster Gas Mass Function (1997)

Shimasaku, Kazuhiro

We investigate the gas mass function of clusters of galaxies to measure the density fluctuation spectrum on cluster scales. The baryon abundance confined in rich clusters is computed from the gas...