Tomita Kenji TOMITA Kenji

Articles:  1-20 of 64

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  • Cluster Abundance Evolution and the Sunyaev-Zeldovich Effect in Various Cosmological Models

    TOMITA Kenji , Yukawa Institute for Theoretical Physics Kyoto University

    The redshift dependence of the observed cluster abundance due to the Sunyaev-Zeldovich effect (SZE) is studied in various cosmological models, including flat and open homogeneous (CDM) models and an i …

    Progress of Theoretical Physics 111(1), 1-12, 2004-01-25

    DOI  References (48)

  • Shell Model Study of Even-Even Xe Isotopes

    HIGASHIYAMA Koji , YOSHINAGA Naotaka , TANABE Kousai

    Progress of theoretical physics. Supplement (146), 563-564, 2002-12-26

    DOI  NDL Digital Collections  References (9)

  • Luminous Matter Distribution, Bulk Flows and Baryon Content in Cosmological Models with a Local Void

    TOMITA Kenji , Yukawa Institute for Theoretical Physics Kyoto University

    First, we consider galaxy formation from the viewpoint of hierarchical clustering theory and discuss the possibility that inhomogeneous models with a local void may be compatible with the observed hom …

    Progress of Theoretical Physics 108(1), 103-117, 2002-07-25

    DOI  References (52)

  • Analyses of Type Ia Supernova Data in Cosmological Models with a Local Void

    TOMITA Kenji , Yukawa Institute for Theoretical Physics Kyoto University

    The data for type Ia supernovae obtained by the High-z SN Search Team and Supernova Cosmology Project are analyzed using inhomogeneous cosmological models with a local void on scales of about 200 Mpc, …

    Progress of Theoretical Physics 106(5), 929-939, 2001-11-25

    J-STAGE  References (20)

  • Anisotropy of the Hubble Constant in a Cosmological Model with a Local Void on Scales of 〜 200 Mpc

    TOMITA Kenji , Yukawa Institute for Theoretical Physics Kyoto University

    A spherical cosmological model with a local void on scales of ~ 200 Mpc and with an inhomogeneous Hubble constant was proposed in two recent papers. This model explains consistently the observed prope …

    Progress of Theoretical Physics 105(3), 419-427, 2001-03-25

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  • Triaxiality-Driving Effect Extracted by Spin Projection

    ENAMI Ken-ichi , TANABE Kosai , YOSHINAGA Naotaka , HIGASHIYAMA Koji , Department of Physics Saitama University , Department of Physics Saitama University , Department of Physics Saitama University , Department of Physics Saitama University

    The effect of triaxial spin projection on the potential energy surface in the deformation parameter space (ε, γ) is investigated for three nuclei, ^<142>Nd, ^<168>Er and ^<188>Os. Th …

    Progress of Theoretical Physics 104(4), 757-767, 2000-10-25

    DOI  References (20)

  • Distances in Inhomogeneous Cosmological Models

    TOMITA Kenji , ASADA Hideki , HAMANA Takashi

    Distances play important roles in cosmological observations, especially in gravitational lens systems, but there is a problem in determining distances because they are defined in terms of light propag …

    Progress of Theoretical Physics 133, 155-181, 1999-05-31

    DOI  NDL Digital Collections  References (52)

  • Various Approaches to Cosmological Gravitational Lensing in Inhomogeneous Models

    TOMITA Kenji , PREMADI Premana , NAKAMURA Takahiro

    Gravitational lensing of distant objects caused by gravitational tidal forces from inhomogeneities in the universe is weak in most cases, but it is noticed that it gives a great deal of information ab …

    Progress of Theoretical Physics 133, 85-113, 1999-05-31

    DOI  NDL Digital Collections  References (67) Cited by (1)

  • Angular Diameter Distances in Clumpy Friedmann Universes

    TOMITA Kenji , Yukawa Institute for Theoretical Physics Kyoto University

    Solving null-geodesic equations, behavior of angular diameter distances is studied in inhomogeneous cosmological models, which are given by performing N-body simulations with the CDM spectrum. The dis …

    Progress of Theoretical Physics 100(1), 79-90, 1998-07-25

    J-STAGE  References (14)

  • Cosmological Simulation of Gravitational Weak Lensing in Flat Models

    TOMITA Kenji , Yukawa Institute for Theoretical Physics Kyoto University

    Statistical averages of optical quantities (the convergence, shear and amplification) for ray bundles passing through cosmological inhomogeneities are derived in flat models (the S model with (Ω_0,λ_0 …

    Progress of Theoretical Physics 99(1), 97-108, 1998-01-25

    J-STAGE  References (16)

  • Periodic Coexistence of Superconductivity with Magnetic Order

    TANABE Kosai , SEKI Seiichi

    A new type of solution is found of the one-dimensional Ginzburg-Landau equation for superconducting pairing gap Δ(x) coupled with magnetization M(x). It describes a periodic coexistence of super …

    Journal of the Physical Society of Japan 64(10), 3635-3638, 1995-10-15

    J-STAGE  References (10)

  • Masking Effect on High-Redshift QSOs due to Foreground Galaxies

    Tomita Kenji , Watanabe Kazuya , Tagoshi Hideyuki

    Publications of the Astronomical Society of Japan 45(4), p487-495, 1993-08

  • Motion of a Spherical Domain Wall and the Large-Scale Structure Formation

    Kazuhiro YAMAMOTO , Kenji TOMITA , Uji Research Center Yukawa Institute for Theoretical Physics Kyoto University , Uji Research Center Yukawa Institute for Theoretical Physics Kyoto University

    The evolution of a wall-1ike structure in the universe is investigated by assuming a simplified model of a domain wall. The domain wall is approximated as a thin spherical shell with domain wall-like …

    Progress of Theoretical Physics 86(5), p1003-1020, 1991-11

    IR  DOI 

  • Post-Newtonian Equations of Motion in Flat Cosmological Models

    Kenji TOMITA , Uji Research Center Yukawa Institute for Theoretical Physics Kyoto University

    The post-Newtonian equations of motion for particles in an expanding universe are derived in spatially flat models with cosmological constant. This system of equations is an extended version of the pr …

    Progress of Theoretical Physics 85(5), p1041-1047, 1991-05

    DOI 

  • Gravitational Lens Effect of Wall-Like Objects and Its Cosmological Implications

    Kenji TOMITA , Uji Research Center Yukawa Institute for Theoretical Physics Kyoto University

    First we derive the gravitational deflection angle of light rays passing through a disk consisting of pressureless matter, and show that it behaves like a convex lens. Next we derive the two-ray diffe …

    Progress of Theoretical Physics 85(1), p57-67, 1991-01

    DOI 

  • Observational Relations in Model Universes Dominated by Negative-Pressure Matter

    Kenji TOMITA , Kazuya WATANABE , Uji Reseach Center Yukawa Institute for Theoretical Physics Kyoto University , Uji Reseach Center Yukawa Institute for Theoretical Physics Kyoto University

    In model universes dominated by defected matter such as domain walls, we consider observational relations among apparent magnitudes of galaxies, redshifts and number counts. It is shown that the ratio …

    Progress of Theoretical Physics 84(5), p892-898, 1990-11

    DOI 

  • Linearities of the f(α)Spectrum at Bifurcations of Chaos in Dissipative Differential Systems

    Hirotaka TOMINAGA , Hiroki HATA , Takehiko HORITA , Hazime MORI , Koji TOMITA , Department of Physics Kyushu University , Department of Physics Kyushu University , Department of Physics Kyushu University , Department of Physics Kyushu University , Tokyo Development Center Yaskawa Electric MFG.Co. LTD

    It is shown that the singularity spectrum f(α) of the natural invariant measure in the driven damped pendulum exhibits three types of linear slopes at bifurcation points of chaos, which agree with the …

    Progress of Theoretical Physics 84(1), p18-22, 1990-07

    DOI 

  • Microscopic Structure of the Superdeformed Rotational Band in 132Ce

    Kosai TANABE , Kazuko SUGAWARA-TANABE , Department of Physics College of Liberal Arts Saitama University , Department of Physics University of Tokyo

    The self-consistent cranked Hartree-Fock-Bogoliubov calculation with the monopole- and quadrupole-pairing plus quadrupole-quadrupole interactions, predicts that the superdeformed band in ^<132>C …

    Progress of Theoretical Physics 83(6), p1148-1155, 1990-06

    DOI 

  • Gravitational Lens Effect on the Images of High Redshift Objects

    Kenji TOMITA , Kazuya WATANABE , Research Institute for Theoretical Physics Hiroshima University , Research Institute for Theoretical Physics Hiroshima University

    Solving numerically the null geodesic equations in an inhomogeneous model universe consisting of galaxies, we study the gravitational lens effect of galaxies on the images of high redshift objects. Mo …

    Progress of Theoretical Physics 83(3), p467-490, 1990-03

    DOI 

  • The Influence of the Singularity-Enhanced Density of States on the Isotope Effect in a Bond Asymmetric Model for a Cu-O Based High-Tc Superconductor

    Seiichi SEKI , Kosai TANABE , Department of Physics Saitama University , Department of Physics Saitama University

    In a Cu-O based high-T_C superconductor, we investigate possible singularities in the density of states of a bond asymmetric model with intralayer hoppings between nearest and next nearest neighbor O- …

    Progress of Theoretical Physics 83(3), p455-466, 1990-03

    DOI 

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