Hirano, Teruyuki, Suto, Yasushi, Taruya, Atsushi, Narita, Norio, Sato, Bun'ei, Johnson, John Asher, ...
We obtain analytical expressions for the velocity anomaly due to the Rossiter-McLaughlin effect, for the case when the anomalous radial velocity is obtained by cross-correlation with a stellar...
The Seventh Data Release of the Sloan Digital Sky Survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes...
Improved Measurement of the Rossiter-McLaughlin Effect in the Exoplanetary System HD 17156 (2009)
Narita, Norio, Hirano, Teruyuki, Sato, Bun'ei, Winn, Joshua N., Suto, Yasushi, Turner, Edwin L., ...
We present an improved measurement of the Rossiter-McLaughlin effect for the exoplanetary system HD 17156, based on radial-velocity data gathered with the Subaru 8.2m telescope throughout the...
The Spin-Orbit Misalignment of the XO-3 Exoplanetary System (2009)
Winn, Joshua N., Johnson, John Asher, Fabrycky, Daniel, Howard, Andrew W., Marcy, Geoffrey W., Narita, Norio, ...
We present photometric and spectroscopic observations of the 2009 Feb. 2 transit of the exoplanet XO-3b. The new data show conclusively that the planetary orbital axis and stellar rotation axis are...
The seventh data release of the sloan digital sky survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
Nishimichi, Takahiro, Shirata, Akihito, Taruya, Atsushi, Yahata, Kazuhiro, Saito, Shun, Suto, Yasushi, ...
We use a series of cosmological N-body simulations and various analytic models to study the evolution of the matter power spectrum in real space in a \Lambda Cold Dark Matter universe. We compare the...
The prograde orbit of exoplanet TrES-2b (2008)
Winn, Joshua N., Johnson, John Asher, Narita, Norio, Suto, Yasushi, Turner, Edwin L., Fischer, Debra A., ...
We monitored the Doppler shift of the G0 V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in...
Kawahara, Hajime, Reese, Erik D., Kitayama, Tetsu, Sasaki, Shin, Suto, Yasushi
Our previous analysis indicates that small-scale fluctuations in the intracluster medium (ICM) from cosmological hydrodynamic simulations follow the lognormal distribution. In order to test the...
Measurement of the Spin-Orbit Angle of Exoplanet HAT-P-1b (2008)
Johnson, John A., Winn, Joshua N., Narita, Norio, Enya, Keigo, Williams, Peter K. G., Marcy, Geoffrey W., ...
We present new spectroscopic and photometric observations of the HAT-P-1 planetary system. Spectra obtained during three transits exhibit the Rossiter-McLaughlin effect, allowing us to measure the...
The Prograde Orbit of Exoplanet TrES-2b (2008)
Winn, Joshua N., Johnson, John Asher, Narita, Norio, Suto, Yasushi, Turner, Edwin L., Fischer, Debra A., ...
We monitored the Doppler shift of the G0V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Prieto, Carlos Allende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
Simulations of Baryon Acoustic Oscillations I: Growth of Large-Scale Density Fluctuations (2008)
Takahashi, Ryuichi, Yoshida, Naoki, Matsubara, Takahiko, Sugiyama, Naoshi, Kayo, Issha, Nishimichi, Takahiro, ...
We critically examine how well the evolution of large-scale density perturbations is followed in cosmological $N$-body simulations. We first run a large volume simulation and perform a mode-by-mode...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the sloan digital sky survey (2008)
Adelman-McCarthy, Jennifer K., Agüros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, Anderson, Kurt S. J., Anderson, Scott F., ...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The Cosmological Constant, Takahiko Matsubara, Yasushi Suto
We propose cosmological redshift-space distortion of correlation functions of galaxies and quasars as a useful probe of both the density parameter\Omega 0 and the cosmological constant 0 . In...
Nonlinear Evolution Of Genus In Primordial Random -- Gaussian Density Field (2007)
Takahiko Matsubara, Yasushi Suto
The genus statistics is studied using large N-body simulations for several cosmological models. We consider the effects of nonlinear gravitational evolution, smoothing the particle data in fully...
Yasushi Suto, Takahiko Matsubara
We discuss the two potentially important effects which should be taken into account in the analysis of the cosmological redshift-space distortion especially at high redshifts; the effect of...
Liu, Xin, Turner, Edwin L., Narita, Norio, Suto, Yasushi, Winn, Joshua N., Yamada, Toru, ...
We present a new technique for detecting scattered starlight from transiting, close-orbiting extrasolar giant planets (CEGPs) that has the virtues of simplicity, robustness, linearity, and...
Spin-Orbit Alignment for the Eccentric Exoplanet HD 147506b (2007)
Winn, Joshua N., Johnson, John Asher, Peek, Kathryn M. G., Marcy, Geoffrey W., Bakos, Gaspar A., Enya, Keigo, ...
The short-period exoplanet HD 147506b (also known as HAT-P-2b) has an eccentric orbit, raising the possibility that it migrated through planet-planet scattering or Kozai oscillations accompanied by...
Systematic Errors in the Hubble Constant Measurement from the Sunyaev-Zel'dovich effect (2007)
Kawahara, Hajime, Kitayama, Tetsu, Sasaki, Shin, Suto, Yasushi
The Hubble constant estimated from the combined analysis of the Sunyaev-Zel'dovich effect and X-ray observations of galaxy clusters is systematically lower than those from other methods by 10-15...
Nishimichi, Takahiro, Ohmuro, Hiroshi, Nakamichi, Masashi, Taruya, Atsushi, Yahata, Kazuhiro, Shirata, Akihito, ...
An acoustic oscillation of the primeval photon-baryon fluid around the decoupling time imprints a characteristic scale in the galaxy distribution today, known as the baryon acoustic oscillation (BAO)...
Shirata, Akihito, Suto, Yasushi, Hikage, Chiaki, Shiromizu, Tetsuya, Yoshida, Naoki
We explore observational constraints on possible deviations from Newtonian gravity by means of large-scale clustering of galaxies. We measure the power spectrum and the bispectrum of Sloan Digital...
Yamamoto, Kazuhiro, Parkinson, David, Hamana, Takashi, Nichol, Robert C., Suto, Yasushi
We consider the extent to which future imaging surveys of galaxies can distinguish between dark energy and modified gravity models for the origin of the cosmic acceleration. Dynamical dark energy...
Measurement of the Rossiter--McLaughlin Effect in the Transiting Exoplanetary System TrES-1 (2007)
Narita, Norio, Enya, Keigo, Sato, Bun'ei, Ohta, Yasuhiro, Winn, Joshua N., Suto, Yasushi, ...
We report a measurement of the Rossiter--McLaughlin effect in the transiting extrasolar planetary system TrES-1, via simultaneous spectroscopic and photometric observations with the Subaru and MAGNUM...
Nishimichi, Takahiro, Kayo, Issha, Hikage, Chiaki, Yahata, Kazuhiro, Taruya, Atsushi, Jing, Yi Peng, ...
The fifth data release of the sloan digital sky survey (2007)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
The fifth data release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The Fifth Data Release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The Fifth Data Release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The fifth data release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
Winn, Joshua N., Holman, Matthew J., Henry, Gregory W., Roussanova, Anna, Enya, Keigo, Yoshii, Yuzuru, ...
We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning two years. Using the transit photometry, we determine the stellar and...
Ohta, Yasuhiro, Taruya, Atsushi, Suto, Yasushi
We present theoretical predictions for photometric and spectroscopic signatures of rings around transiting extrasolar planets. On the basis of a general formulation for the transiting signature in...
Kawahara, Hajime, Suto, Yasushi, Kitayama, Tetsu, Sasaki, Shin, Shimizu, Mamoru, Rasia, Elena, ...
The origin of the recently reported systematic bias in the spectroscopic temperature of galaxy clusters is investigated using cosmological hydrodynamical simulations. We find that the local...
The dependence of dark halo clustering on the formation epoch and the concentration parameter (2006)
Jing, Y. P., Suto, Yasushi, Mo, H. J.
We examine the age-dependence of dark matter halo clustering in an unprecedented accuracy using a set of 7 high-resolution cosmological simulations each with $N=1024^3$ particles. We measure the bias...
Nishimichi, Takahiro, Kayo, Issha, Hikage, Chiaki, Yahata, Kazuhiro, Taruya, Atsushi, Jing, Y. P., ...
We consider nonlinear biasing models of galaxies with particular attention to a correlation between linear and quadratic biasing coefficients, b_1 and b_2. We first derive perturbative expressions...
Measurement of the Spin-Orbit Alignment in the Exoplanetary System HD 189733 (2006)
Winn, Joshua N., Johnson, John A., Marcy, Geoffrey W., Butler, R. Paul, Vogt, Steven S., Henry, Gregory W., ...
We present spectroscopy of a transit of the exoplanet HD 189733b. By modeling the Rossiter-McLaughlin effect (the anomalous Doppler shift due to the partial eclipse of the rotating stellar surface),...
The effect of FIR emission from SDSS galaxies on the SFD Galactic extinction map (2006)
Yahata, Kazuhiro, Yonehara, Atsunori, Suto, Yasushi, Turner, Edwin L., Broadhurst, Tom, Finkbeiner, Douglas P.
We compare the most successful and widely used map of Galactic dust extinction, provided by Schlegel, Finkbeiner & Davis (1998; hereafter SFD), to the galaxy number counts in the Sloan Digital Sky...
Yamamoto, Kazuhiro, Bassett, Bruce A., Nichol, Robert C., Suto, Yasushi, Yahata, Kazuhiro
We discuss how the baryon acoustic oscillation (BAO) signatures in the galaxy power spectrum can distinguish between modified gravity and the cosmological constant as the source of cosmic...
Extrasolar Transiting Planet Search with Subaru Suprime-Cam (2006)
Urakawa, Seitaro, Yamada, Toru, Suto, Yasushi, Turner, Edwin. L., Itoh, Yoichi, Mukai, Tadashi, ...
We report the results of a prototype photometric search for transiting extrasolar planets using Subaru Suprime-Cam. Out of about 100,000 stars monitored around the Galactic plane (l=90 degree,b=0...
Shimizu, Mamoru, Kitayama, Tetsu, Sasaki, Shin, Suto, Yasushi
We revisit the estimate of the mass fluctuation amplitude, sigma_8, from the observational X-ray cluster abundance. In particular, we examine the effect of the systematic difference between the...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
Joshua N. Winn, Matthew J. Holman, Gregory W. Henry, Anna Roussanova, Keigo Enya, Yuzuru Yoshii, ...
We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and...
Joshua N. Winn, John Asher Johnson, Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt, Gregory W. Henry, ...
We present spectroscopy of a transit of the exoplanet HD 189733b. By modeling the Rossiter-McLaughlin effect (the anomalous Doppler shift due to the partial eclipse of the rotating stellar surface),...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
Discovery of Multiply Imaged Galaxies behind the Cluster and Lensed Quasar SDSS J1004+4112 (2005)
Sharon, Keren, Ofek, Eran O., Smith, Graham P., Broadhurst, Tom J., Maoz, Dan, Kochanek, Christopher S., ...
We have identified three multiply imaged galaxies in Hubble Space Telescope images of the redshift z=0.68 cluster responsible for the large-separation quadruply lensed quasar, SDSS J1004+4112....
Topology Analysis of the Sloan Digital Sky Survey: I. Scale and Luminosity Dependences (2005)
Park, Changbom, Choi, Yun-Young, Vogeley, Michael, Gott III, J. Richard, Kim, Juhan, Hikage, Chiaki, ...
We measure the topology of volume-limited galaxy samples selected from a parent sample of 314,050 galaxies in the Sloan Digital Sky Survey(SDSS), which is now complete enough to describe the fully...
Fourier Phase Analysis of SDSS Galaxies (2005)
Hikage, Chiaki, Matsubara, Takahiko, Suto, Yasushi, Park, Changbom, Szalay, Alexander S., Brinkmann, Jon
We present a first analysis of the clustering of SDSS galaxies using the distribution function of the sum of Fourier phases. This statistic was recently proposed by one of authors as a new method to...
Lee, Jounghun, Jing, Yipeng, Suto, Yasushi
We present an analytic expression for the axis ratio distribution of triaxial dark matter halos driven from physical principles. Adopting the picture of triaxial collapse based on the Zel'dovich...
Soft X-ray Transmission Spectroscopy of Warm/Hot Intergalactic Medium with XEUS (2005)
Kawahara, Hajime, Yoshikawa, Kohji, Sasaki, Shin, Suto, Yasushi, Kawai, Nobuyuki, Mitsuda, Kazuhisa, ...
We discuss the detectability of Warm/Hot Intergalactic medium (WHIM) via the absorption lines toward bright point sources with a future X-ray satellite mission, XEUS. While we consider bright QSOs as...
Subaru HDS Transmission Spectroscopy of the Transiting Extrasolar Planet HD 209458b (2005)
Narita, Norio, Suto, Yasushi, Winn, Joshua N., Turner, Edwin L., Aoki, Wako, Leigh, Christopher J., ...
We have searched for absorption in several common atomic species due to the atmosphere or exosphere of the transiting extrasolar planet HD 209458b, using high precision optical spectra obtained with...
Measurement of Spin-Orbit Alignment in an Extrasolar Planetary System (2005)
Winn, Joshua N., Noyes, Robert W., Holman, Matthew J., Charbonneau, David, Ohta, Yasuhiro, Taruya, Atsushi, ...
We determine the stellar, planetary, and orbital properties of the transiting planetary system HD 209458, through a joint analysis of high-precision radial velocities, photometry, and timing of the...
Galaxy clustering constraints on deviations from Newtonian gravity at cosmological scales (2005)
Shirata, Akihito, Shiromizu, Tetsuya, Yoshida, Naoki, Suto, Yasushi
In spite of the growing observational evidence for dark matter and dark energy in the universe, their physical nature is largely unknown. In fact, several authors have proposed modifications of...
Yahata, Kazuhiro, Suto, Yasushi, Kayo, Issha, Matsubara, Takahiko, Connolly, Andrew, Berk, Daniel Vanden, ...
We report the first result of the clustering analysis of Sloan Digital Sky Survey (SDSS) quasars. We compute the two-point correlation function (2PCF) of SDSS quasars in redshift space at...
Ohta, Yasuhiro, Taruya, Atsushi, Suto, Yasushi
A transiting extrasolar planet sequentially blocks off the light coming from the different parts of the disk of the host star in a time dependent manner. Due to the spin of the star, this produces an...
Measuring our Universe from Galaxy Redshift Surveys (2004)
Galaxy redshift surveys have achieved significant progress over the last couple of decades. Those surveys tell us in the most straightforward way what our local Universe looks like. While the galaxy...
Winn, Joshua N., Suto, Yasushi, Turner, Edwin L., Narita, Norio, Frye, Brenda L., Aoki, Wako, ...
There is evidence that the transiting planet HD 209458b has a large exosphere of neutral hydrogen, based on a 15% decrement in Lyman-alpha flux that was observed by Vidal-Madjar et al. during...
Kayo, Issha, Suto, Yasushi, Nichol, Robert C., Pan, Jun, Szapudi, Istvan, Connolly, Andrew J., ...
We present measurements of the redshift--space three-point correlation function of galaxies in the Sloan Digital Sky Survey (SDSS). For the first time, we analyze the dependence of this statistic on...
Searching for cosmic missing baryons with DIOS -- Diffuse Intergalactic Oxygen Surveyor -- (2004)
Suto, Yasushi, Yoshikawa, Kohji, Yamasaki, Noriko Y., Mitsuda, Kazuhisa, Fujimoto, Ryuichi, Furusho, Tae, ...
Approximately 30 to 50 percent of the total baryons in the present universe is supposed to take a form of warm/hot intergalactic medium (WHIM) whose X-ray continuum emission is very weak. In order to...
Oguri, Masamune, Inada, Naohisa, Keeton, Charles R., Pindor, Bartosz, Hennawi, Joseph F., Gregg, Michael D., ...
We study the recently discovered gravitational lens SDSS J1004+4112, the first quasar lensed by a cluster of galaxies. It consists of four images with a maximum separation of 14.62". The system was...
Simulations of Large-Scale Structure in the New Millennium (2003)
Simulations of large-scale structure in the universe have played a vital role in observational cosmology since 1980's in particular. Their important role will definitely continue to be true in the...
Monte-Carlo Modeling of Non-Gravitational Heating Processes in Galaxy Clusters (2003)
Shimizu, Mamoru, Kitayama, Tetsu, Sasaki, Shin, Suto, Yasushi
We consider non-gravitational heating effects on galaxy clusters on the basis of the Monte-Carlo modeling of merging trees of dark matter halos combined with the thermal evolution of gas inside each...
Measuring our universe from galaxy redshift surveys (2003)
Galaxy redshift surveys have achieved significant progress over the last couple of decades. Those surveys tell us in the most straightforward way what our local universe looks like. While the galaxy...
Hikage, Chiaki, Matsubara, Takahiko, Suto, Yasushi
We explore a signature of phase correlations in Fourier modes of dark matter density fields induced by nonlinear gravitational clustering. We compute the distribution function of the phase sum of the...
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...
While the use of galaxy clusters as {\it tools} to probe cosmology is established, their conventional description still relies on the spherical and/or isothermal models that were proposed more than...
Oguri, Masamune, Lee, Jounghun, Suto, Yasushi
Statistics of lensed arcs in clusters of galaxies serve as a powerful probe of both the non-sphericity and the inner slope of dark matter halos. We develop a semi-analytic method to compute the...
Modeling peculiar velocities of dark matter halos (2003)
Hamana, Takashi, Kayo, Issha, Yoshida, Naoki, Suto, Yasushi, Jing, Y. P.
We present a simple model that accurately describes various statistical properties of peculiar velocities of dark matter halos. We pay particular attention to the following two effects; first, the...
Minkowski Functionals of SDSS galaxies I : Analysis of Excursion Sets (2003)
Hikage, Chiaki, Schmalzing, Jens, Buchert, Thomas, Suto, Yasushi, Kayo, Issha, Taruya, Atsushi, ...
We present a first morphometric investigation of a preliminary sample from the SDSS of 154287 galaxies with apparent magnitude 14.5
Detectability of the Warm/Hot Intergalactic Medium Through Emission Lines of OVII and OVIII (2003)
Yoshikawa, Kohji, Yamasaki, Noriko Y., Suto, Yasushi, Ohashi, Takaya, Mitsuda, Kazuhisa, Tawara, Yuzuru, ...
Most of cosmic baryons predicted by the big-bang nucleosynthesis has evaded the direct detection. Recent numerical simulations indicate that approximately 30 to 50 percent of the total baryons in the...
Biasing and Genus Statistics of Dark Matter Halos in the Hubble Volume Simulation (2003)
Hikage, Chiaki, Taruya, Atsushi, Suto, Yasushi
We present a numerical analysis of genus statistics for dark matter halo catalogs from the Hubble volume simulation. The huge box-size of the Hubble volume simulation enables us to carry out a...
A gravitationally lensed quasar with quadruple images separated by 14.62arcseconds (2003)
Inada, Naohisa, Oguri, Masamune, Pindor, Bartosz, Hennawi, Joseph F., Chiu, Kuenley, Zheng, Wei, ...
Gravitational lensing is a powerful tool for the study of the distribution of dark matter in the Universe. The cold-dark-matter model of the formation of large-scale structures (that is, clusters of...
Minkowski Functionals of SDSS galaxies I: Analysis of Excursion Sets (2003)
Chiaki Hikage, Jens Schmalzing, Thomas Buchert, Yasushi Suto, Issha Kayo, Atsushi Taruya, ...
We present a rst morphometric investigation of a preliminary sample from the SDSS of 154287 galaxies with apparent magnitude 14:5 < m r < 17:5 and redshift 0:001 < z < 0:4. We measure the...
Shimizu, Mamoru, Kitayama, Tetsu, Sasaki, Shin, Suto, Yasushi
We derive constraints on the mass-temperature relation of galaxy clusters from their observed luminosity-temperature relation and X-ray temperature function. Adopting the isothermal gas in...
Modeling Intra-Cluster Gas in Triaxial Dark Halos : An Analytical Approach (2002)
We present the first physical model for the non-spherical intra-cluster gas distribution in hydrostatic equilibrium under the gravity of triaxial dark matter halos. Adopting the concentric triaxial...
Gravitational Lensing Magnification and Time Delay Statistics for Distant Supernovae (2002)
Oguri, Masamune, Suto, Yasushi, Turner, Edwin L.
Strong gravitational lensing of distant supernovae (SNe), particularly Type Ia's, has some exploitable properties not available when other sorts of cosmologically distant sources are lensed. One such...
Three-Dimensional Genus Statistics of Galaxies in the SDSS Early Data Release (2002)
Hikage, Chiaki, Suto, Yasushi, Kayo, Issha, Taruya, Atsushi, Matsubara, Takahiko, Vogeley, Michael S., ...
We present the first analysis of three-dimensional genus statistics for the SDSS EDR galaxy sample. Due to the complicated survey volume and the selection function, analytic predictions of the genus...
Shimizu, Mamoru, Kitayama, Tetsu, Sasaki, Shin, Suto, Yasushi
We examine the reliability of the merger trees generated for the Monte-Carlo modeling of galaxy formation. In particular we focus on the cold gas fraction predicted from the merger trees with...
Density profiles and clustering of dark halos and clusters of galaxies (2002)
Density profiles of cosmological virialized systems, or dark halos, have recently attracted much attention. I first present a brief historical review of numerical simulations to quantify the halo...
Kuwabara, Takeshi, Taruya, Atsushi, Suto, Yasushi
We derive the pairwise peculiar velocity distribution function of dark matter particles applying the dark matter halo approach. Unlike the previous work, we do not assume a Gaussian velocity...
Triaxial Modeling of Halo Density Profiles with High-resolution N-body Simulations (2002)
We present a detailed non-spherical modeling of dark matter halos on the basis of a combined analysis of the high-resolution halo simulations (12 halos with $N\sim 10^6$ particles within their virial...
High-resolution numerical simulations for galaxy formation (2002)
Understanding of the structure evolution in the Universe has been greatly advanced with a rapid progress in high-resolution cosmological simulations. In this contribution, we report a new set of...
Jing, Y. P., Boerner, G., Suto, Yasushi
We report on the measurement of the two-point correlation function and the pairwise peculiar velocity of galaxies in the IRAS PSCz survey. The real space two-point correlation function can be fitted...
Strong Gravitational Lensing Time Delay Statistics and the Density Profile of Dark Halos (2001)
Oguri, Masamune, Taruya, Atsushi, Suto, Yasushi, Turner, Edwin L.
The distribution of differential time delays \Delta t between images produced by strong gravitational lensing contains information on the mass distributions in the lensing objects as well as on...
Hamana, Takashi, Yoshida, Naoki, Suto, Yasushi
We critically examine the reliability of the dark matter clustering in high-resolution cosmological $N$-body simulations on scales below the mean separation length of particles. The particle...
Suginohara, Tatsushi, Taruya, Atsushi, Suto, Yasushi
The well-known self-similar solution for the two-point correlation function of the density field is valid only in an Einstein-de Sitter universe. We attempt to extend the solution for non-Einstein-de...
Clustering of Dark Matter Halos on the Light-cone (2001)
A phenomenological model for the clustering of dark matter halos on the light-cone is presented. In particular, an empirical prescription for the scale-, mass-, and time-dependence of halo biasing is...
Hamana, Takashi, Yoshida, Naoki, Suto, Yasushi, Evrard, August E.
We develop a phenomenological model to predict the clustering of dark matter halos on the light-cone by combining several existing theoretical models. Assuming that the velocity field of halos on...
Fukushige, Toshiyuki, Suto, Yasushi
We report on the detailed analysis of the mean-pairwise peculiar velocity profile in high-resolution cosmological N-body simulations ($N=8.8\times 10^6$ particles in a sphere of $50 \sim 200$Mpc...
Probing the Core Structure of Dark Halos with Tangential and Radial Arc Statistics (2001)
Oguri, Masamune, Taruya, Atsushi, Suto, Yasushi
We study the arc statistics of gravitational lensing generated by dark matter halos in order to probe their density profile. We characterize the halo profile by two parameters, the inner slope of the...
Kayo, Issha, Taruya, Atsushi, Suto, Yasushi
We quantitatively study the probability distribution function (PDF) of cosmological nonlinear density fluctuations from N-body simulations with Gaussian initial condition. In particular, we examine...
Yoshikawa, Kohji, Taruya, Atsushi, Jing, Y. P., Suto, Yasushi
We perform an extensive analysis of nonlinear and stochastic biasing of galaxies and dark halos in spatially flat low-density CDM universe using cosmological hydrodynamic simulations. We compare...
Genus statistics for galaxy clusters and nonlinear biasing of dark matter halos (2001)
Hikage, Chiaki, Taruya, Atsushi, Suto, Yasushi
We derive an analytic formula of genus for dark matter halos assuming that the primordial mass density field obeys the random-Gaussian statistics. In particular, we for the first time take account of...
Jing, Y. P., Boerner, G., Suto, Yasushi
We report on the measurement of the two-point correlation function, and the pairwise peculiar velocity of galaxies in the IRAS PSCz survey. We compute these statistics first in redshift space, and...
The Universe Traced by Clusters (2000)
I critically review a methodology of using clusters of galaxies as cosmological probes. The understanding of the abundances and spatial correlations of dark matter halos has been significantly...
Hamana, Takashi, Colombi, Stephane, Suto, Yasushi
We examine the light-cone effect on the two-point correlation functions using numerical simulations for the first time. Specifically, we generate several sets of dark matter particle distributions on...
Superclustering of Faint Galaxies in the Field of a QSO Concentration at z~1.1 (2000)
Tanaka, Ichi, Yamada, Toru, Turner, Edwin L., Suto, Yasushi
We report on a wide-area (48' x 9') imaging survey of faint galaxies in R and I bands toward the 1338+27 field where an unusual concentration of five QSOs at z\sim1.1, embedded in a larger-scale...
Komatsu, Eiichiro, Matsuo, Hiroshi, Kitayama, Tetsu, Hattori, Makoto, Kawabe, Ryohei, Kohno, Kotaro, ...
We report on mapping observations toward the region of the most luminous X-ray cluster RXJ1347-1145 (z=0.45) through the Sunyaev-Zel'dovich effect at 21GHz and 150GHz with the Nobeyama 45-m...
Nonlinear stochastic biasing from the formation epoch distribution of dark halos (2000)
Taruya, Atsushi, Suto, Yasushi
We propose a physical model for nonlinear stochastic biasing of one-point statistics resulting from the formation epoch distribution of dark halos. In contrast to previous works on the basis of...
Clustering statistics on a light-cone in the cosmological redshift space (2000)
We summarize a series of our recent work concerning the cosmological redshift-space distortion and light-cone effects. After briefly describing the theoretical formalism, we show how those effects...
Dark Matter Halos Simulated with Million Particles (2000)
We report a series of high-resolution N-body simulations designed to examine the internal physical properties of dark matter halos. A total of fifteen halos, each represented by $\sim 1$ million...
Yoshikawa, Kohji, Jing, Y. P., Suto, Yasushi
We present results from a series of cosmological SPH (smoothed particle hydrodynamics) simulations coupled with the P3M (Particle-Particle-Particle-Mesh) solver for the gravitational force. The...
Eiichiro Komatsu, Hiroshi Matsuo, Tetsu Kitayama, Makoto Hattori, Ryohei Kawabe, Kotaro Kohno, ...
We report on mapping observations toward the region of the most luminous X-ray cluster RX J1347-- 1145 (z = 0:45) through the Sunyaev--Zel'dovich effect at 21 GHz and 150 GHz with the Nobeyama...
Density Profiles of Dark Matter Halo are not Universal (1999)
We perform a series of high-resolution N-body simulations designed to examine the density profiles of dark matter halos. From 12 simulated halos ranging the mass of $2\times10^{12}\sim 5\times10^{14}...
Yamamoto, Kazuhiro, Nishioka, Hiroaki, Suto, Yasushi
We examine observational consequences of the cosmological light-cone effect on the power spectrum of the distribution of galaxies and quasars from upcoming redshift surveys. First we derive an...
Magira, Hiromitsu, Jing, Y. P., Suto, Yasushi
We examine the cosmological redshift-space distortion effect on the power spectrum of the objects at high-redshifts, which is an unavoidable observational contamination in general relativistic...
Suto, Yasushi, Yamamoto, Kazuhiro, Kitayama, Tetsu, Jing, Y. P.
We have developed a model to describe two-point correlation functions of clusters of galaxies in X-ray flux-limited surveys. Our model properly takes account of nonlinear gravitational evolution of...
Cosmological Implications of Galaxy Clusters in X-Ray, Millimeter, and Submillimeter Bands (1999)
Suto, Yasushi, Kitayama, Tetsu, Komatsu, Eiichiro, Hattori, Makoto, Kawabe, Ryohei, Matsuo, Hiroshi, ...
Cosmological implications of clusters of galaxies are discussed with particular attention to their importance in probing the cosmological parameters. More specifically we compute the number counts of...
Komatsu, Eiichiro, Kitayama, Tetsu, Suto, Yasushi, Hattori, Makoto, Kawabe, Ryohei, Matsuo, Hiroshi, ...
We report on the detection of the Sunyaev -- Zel'dovich (SZ) signals toward the most luminous X-ray cluster RXJ1347-1145 at Nobeyama Radio Observatory (21 and 43 GHz) and at James Clerk Maxwell...
Suto, Yasushi, Magira, Hiromitsu, Jing, Y. P., Matsubara, Takahiko, Yamamoto, Kazuhiro
The three-dimensional distribution of astronomical objects observed in redshift space significantly differs from the true distribution since the distance to each object cannot be determined by its...
Yasushi Suto, Hiromitsu Magira, Y. P. Jing, Takahiko Matsubara, Kazuhiro Yamamoto
This paper consists of two topics which should play key roles in the theoretical interpretation of the future redshift surveys of high-redshift objects, the cosmological light-cone effect (x2) and...
Yamamoto, Kazuhiro, Suto, Yasushi
While all the cosmological observations are carried out on a light-cone, the null hypersurface of an observer at z=0, the clustering statistics has been properly defined only on the constant-time...
Yoshikawa, Kohji, Suto, Yasushi
We describe a non-parametric method to reconstruct gas density and temperature profiles of galaxy clusters from observations of X-ray surface brightness, emission-weighted temperature and the...
Suto, Yasushi, Sasaki, Shin, Makino, Nobuyoshi
We describe a theoretical framework to compute the cluster gas distribution in hydrostatic equilibrium embedded in a class of spherical dark matter halo potentials. Unlike the conventional isothermal...
Cosmological Implications of X-ray Clusters of Galaxies (1998)
Suto, Yasushi, Kitayama, Tetsu, Sasaki, Shin
Cosmological implications of clusters of galaxies are discussed with particular attention to their importance in probing the cosmological parameters. More specifically we compute the number counts of...
Yoshikawa, Kohji, Itoh, Makoto, Suto, Yasushi
We have performed a series of simulations of clusters of galaxies on the basis of the smoothed particle hydrodynamics technique in a spatially-flat cold dark matter universe with $\Omega=0.3$,...
X-ray gas density profile of clusters of galaxies from the universal dark matter halo (1997)
Makino, Nobuyoshi, Sasaki, Shin, Suto, Yasushi
The X-ray cluster gas density distribution in hydrostatic equilibrium is computed from the universal density profile of the dark matter halo recently proposed by Navarro, Frenk and White (1996,...
We perform a detailed analysis of the statistical significance of a concentration of Lyman break galaxies at $z \sim 3$ recently discovered by Steidel et al. (1997), using a series of N-body...
Light-cone effect on higher-order clustering in redshift surveys (1997)
Matsubara, Takahiko, Suto, Yasushi, Szapudi, Istvan
We have evaluated a systematic effect on counts-in-cells analysis of deep, wide-field galaxy catalogues induced by the evolution of clustering within the survey volume. A multiplicative correction...
Kitayama, Tetsu, Sasaki, Shin, Suto, Yasushi
We compute the number counts of clusters of galaxies, the logN-logS relation, in several X-ray and submm bands on the basis of the Press-Schechter theory. We pay particular attention to a set of...
Fundamental Discreteness Limitations of Cosmological N-Body Clustering Simulations (1997)
Splinter, Randall J., Melott, Adrian L., Shandarin, Sergei F., Suto, Yasushi
We explore some of the effects that discreteness and two-body scattering may have on N-body simulations with ``realistic'' cosmological initial conditions. We use an identical subset of particles...
Nakamura, Takahiro T., Matsubara, Takahiko, Suto, Yasushi
The observed two-point correlation functions of galaxies in redshift space become anisotropic due to the geometry of the universe as well as due to the presence of the peculiar velocity field. On the...
Kitayama, Tetsu, Suto, Yasushi
We find that the observed log N - log S relation of X-ray clusters can be reproduced remarkably well with a certain range of values for the fluctuation amplitude $\sigma_8$ and the cosmological...
Nakamura, Takahiro T., Suto, Yasushi
Constraints on cosmological models from strong gravitational lensing statistics are investigated. We pay particular attention to the role of the velocity function in the calculation of the lensing...
Kobayashi, Shiho, Sasaki, Shin, Suto, Yasushi
We performed a systematic and comprehensive estimate of the Hubble constant $H_0$ via the Sunyaev-Zel'dovich temperature decrement and the X-ray measurements for clusters up to the redshift...
I discuss two cosmological tests to determine the cosmological density parameter \Omega_0 the cosmological constant \lambda_0, which make use of the anisotropy of the two-point correlation functions...
We discuss the effect of the finite size of galaxies on estimating small-scale relative pairwise peculiar velocity dispersions from the cosmic virial theorem (CVT). Specifically we evaluate the...
Suto, Yasushi, Matsubara, Takahiko
We discuss the two potentially important effects which should be taken into account in the analysis of the cosmological redshift-space distortion especially at high redshifts; the effect of...
Kitayama, Tetsu, Suto, Yasushi
Temperature and luminosity functions of X-ray clusters are computed semi-analytically, combining a simple model for the cluster gas properties with the distribution functions of halo formation epochs...
Matsubara, Takahiko, Suto, Yasushi
We propose cosmological redshift-space distortion of correlation functions of galaxies and quasars as a probe of both the density parameter $\Omega_0$ and the cosmological constant $\lambda_0$. In...
The X-ray halo of the Local Group and the CMB quadrupole (1996)
Since recent X-ray observations have revealed that most clusters of galaxies are surrounded by an X-ray emitting gaseous halo, it is reasonable to expect that the Local Group of galaxies has its own...
Formation rate of gravitational structures and the cosmic X-ray background radiation (1996)
Kitayama, Tetsu, Suto, Yasushi
Analytical expressions for the rates of formation and destruction of gravitationally bound systems are derived assuming that they are originated from primordial random-Gaussian density fluctuations....
Suto, Yasushi, Makishima, Kazuo, Ishisaki, Yoshitaka, Ogasaka, Yasushi
Since recent X-ray observations have revealed that most clusters of galaxies are surrounded by an X-ray emitting gaseous halo, it is reasonable to expect that the Local Group of galaxies has its own...
Nonlinear Evolution of Genus in Primordial Random-Gaussian Density Field (1995)
Matsubara, Takahiko, Suto, Yasushi
The genus statistics is studied using large $N$-body simulations for several cosmological models. We consider the effects of nonlinear gravitational evolution, smoothing the particle data in fully...
Angular two-point correlation functions for cosmological gamma-ray burst model (1994)
Kobayashi, Shiho, Sasaki, Shin, Suto, Yasushi
We compute the angular two-point correlation functions of the gamma-ray bursts at cosmological distances. Since the gamma-ray burst emission mechanism is not yet established, we simply assume that...
Chiba, Takashi, Sugiyama, Naoshi, Suto, Yasushi
We have performed the most comprehensive predictions of the temperature fluctuations \dtt in the primeval isocurvature baryon models to see whether or not the models are consistent with the recent...
The University of Tokyo, Theoretical Astrophysics Group (UTAP)
Sato, Katsuhiko, Suto, Yasushi
An official site of the UTAP (The University of Tokyo, Theoretical Astrophysics Group). The group works on the research on three specific areas of research interest; "Physics of the Early Universe",...
The University of Tokyo, Theoretical Astrophysics Group (UTAP)
Sato, Katsuhiko, Suto, Yasushi
An official site of the UTAP (The University of Tokyo, Theoretical Astrophysics Group). The group works on the research on three specific areas of research interest; "Physics of the Early Universe",...