Tetsu Kitayama

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Foreseeing the era of high spatial resolution measurements of the Sunyaev–Zel’dovich effect (SZE) in clusters of galaxies, we present a prototype analysis of this sort combined with Chandra X-ray data. It is applied specifically to RX J1347–1145 at z = 0.451, the most X-ray-luminous galaxy cluster known, for which the highest resolution SZE and X-ray images(More)
We carried out a target survey for Lyman break galaxies (LBGs) and Lyman α emitters (LAEs) around QSO SDSS J0211-0009 at z = 4.87. The deep and wide broadband and narrowband imaging simultaneously revealed the perspective structure of these two high-z populations. The LBGs without Lyα emission form a filamentary structure including the QSO, while the LAEs(More)
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 proposed by Lacey & Cole (1993) and Kitayama & Suto (1996). In contrast to several previous approaches which apply the Press–Schechter mass function in a(More)
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 eeect at 21 GHz and 150 GHz with the Nobeyama 45-m telescope. While a low angular resolution image at 21 GHz (beam-size FWHM of 76 00) shows a consistent feature with the ROSAT/HRI X-ray image, a higher angular(More)
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 Telescope (350 GHz). In particular the latter is the first successful detection of the SZ temperature increment in the submillimeter band which resolved the profile(More)
We study the evolution of supernova (SN) remnants of the first stars, taking proper account of the radiative feedback of the progenitor stars on the surroundings. We carry out a series of one-dimensional hydrodynamic simulations with radiative cooling, starting from initial configurations that are drawn from the results of our earlier radiation hydrodynamic(More)
EIICHIRO KOMATSU, TETSU KITAYAMA, ALEXANDRE REFREGIER, DAVID N. SPERGEL AND UE-LI PEN 1 Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA 2 School of Natural Sciences, Institute for Advanced Study, Princeton, NJ 08540, USA 3 Astronomical Institute, Tôhoku University, Aoba, Sendai 980-8578, Japan 4 Department of Physics,(More)
We present the results of three-dimensional radiation-hydrodynamics simulations of the formation and evolution of early Hii/Heiii regions around the first stars. Cooling and recollapse of the gas in the relic Hii region is also followed in a full cosmological context, until second-generation stars are formed. We first run a Λ Cold Dark Matter cosmological(More)
For 117 clusters of galaxies, we explore the detectability of intracluster dust grains by current and future infrared facilities, taking into account both collisional heating and sputtering of grains by ambient plasma. If the dust grains are injected into the intergalactic space with the amount and size comparable to the Galactic values, the dust-to-gas(More)
Yasushi Ikebe, Hans Böhringer, and Tetsu Kitayama 1 Joint Center for Astrophysics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA 2 Code 661, NASA/Goddard Space Flight Center, Greenbelt Rd., Greenbelt, MD 20771, USA 3 Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, 85741 Garching, Germany 4(More)