A5062253335- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Radio Astronomy Observations and Technology
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Relativity and Gravitational Theory
- Scientific Research and Discoveries
- Stellar, planetary, and galactic studies
- Computational Physics and Python Applications
- Calibration and Measurement Techniques
- Infrared Target Detection Methodologies
- Pulsars and Gravitational Waves Research
- Metabolism and Genetic Disorders
- Computational Fluid Dynamics and Aerodynamics
- Statistical and numerical algorithms
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Optical Polarization and Ellipsometry
- Antiplatelet Therapy and Cardiovascular Diseases
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Blood Coagulation and Thrombosis Mechanisms
- Optical Systems and Laser Technology
- Folate and B Vitamins Research
- Astrophysics and Cosmic Phenomena
National Astronomical Observatory of Japan
2019-2024
The University of Tokyo
2016-2018
Japan Science and Technology Agency
2016-2018
Kavli Institute for the Physics and Mathematics of the Universe
2016-2018
Tohoku University
2010-2014
Princeton University
2014
National Institute for Basic Biology
2004
Hyogo University of Teacher Education
2004
Daiichi University of Pharmacy
1994-1997
Yokohama City University
1997
To fully extract cosmological information from nonlinear galaxy distribution in redshift space, it is essential to include higher-order statistics beyond the two-point correlation function. In this paper, we propose a new decomposition formalism for computing anisotropic bispectrum space and measuring samples. Our uses tri-polar spherical harmonic with zero total angular momentum compress 3D modes redshift-space bispectrum. This approach preserves three fundamental properties of Universe:...
ABSTRACT In this paper, we predict the covariance matrices of both power spectrum and bispectrum, including full non-Gaussian contributions, redshift space distortions, linear bias effects, shot-noise corrections, using perturbation theory (PT). To quantify redshift-space distortion effect, focus mainly on monopole quadrupole components bispectra. We, for first time, compute 5- 6-point spectra to cross-covariance between bispectra, autocovariance bispectrum in space. We test validity our...
Precise understanding of nonlinear evolution cosmological perturbations during inflation is necessary for the correct interpretation measurements non-Gaussian correlations in cosmic microwave background and large-scale structure universe. The "{\delta}N formalism" a popular powerful technique computing non-linear on large scales. In particular, it enables us to compute curvature perturbation, {\zeta}, scales without actually solving perturbed field equations. However, people often wonder why...
Abstract This paper discusses the science case for a sensitive spectro-polarimetric survey of microwave sky. Such would provide tomographic and dynamic census three-dimensional distribution hot gas, velocity flows, early metals, dust, mass in entire Hubble volume, exploit CMB temperature polarisation anisotropies down to fundamental limits, track energy injection absorption into radiation background across cosmic times by measuring spectral distortions blackbody emission. In addition its...
We report a new test of modified gravity theories using the large-scale structure Universe. This paper is first attempt to (1) apply joint analysis anisotropic components galaxy two- and three-point correlation functions (2 3PCFs) actual data (2) constrain nonlinear effects degenerate higher-order scalar-tensor (DHOST) on cosmological scales. Applying this Baryon Oscillation Spectroscopic Survey (BOSS) release 12, we obtain lower bounds $-1.655 < \xi_{\rm t}$ $-0.504 s}$ at $95\%$ confidence...
While detection of the "local form" bispectrum primordial perturbations would rule out all single-field inflation models, multifield models still be allowed. We show that described by δN formalism obey an inequality between fNL and one local-form trispectrum amplitudes, τNL, such τNL >1/2(6/5fN)(2) with a possible logarithmic scale dependence, provided 2-loop terms are small. Detection violation this most challenging as mechanism for generating primoridal perturbations.
We establish a practical method for the joint analysis of anisotropic galaxy two- and three-point correlation functions (2PCF 3PCF) on basis decomposition formalism 3PCF using tri-polar spherical harmonics. perform such an with MultiDark Patchy mock catalogues to demonstrate understand benefit 3PCF. focus scales above $80 h^{-1}\,{\rm Mpc}$, use information from shape baryon acoustic oscillation (BAO) signals 2PCF also apply density field reconstruction increase signal-noise ratio BAO in...
Abstract We report the case of a 44‐year‐old woman with partial 6‐pyruvoyl tetrahydropterin synthase (6‐PTS) deficiency, whose predominant clinical symptom was generalized dystonia marked diurnal fluctuation. Dystonia present in eyelids, oromandibular region, trunk, and extremities (Meige syndrome plus double hemiplegia‐like dystonia). A sustained positive response to levodopa observed. molecular genetic study revealed homozygous mutation (I114V) 6‐PTS gene. This indicates that abnormality...
We study the non-linear behavior of baryon acoustic oscillation in power spectrum and correlation function by decomposing dark matter perturbations into short- long-wavelength modes. The evolution fluctuations can be described as a global coordinate transformation caused displacement vector acting on short-wavelength perturbation undergoing growth. Using this feature, we investigate well known cancellation high-$k$ solutions standard theory. While theory naturally satisfies solutions, some...
We measure statistically anisotropic signatures imprinted in three-dimensional galaxy clustering using bipolar spherical harmonics (BipoSHs) both Fourier space and configuration space. then constrain a well-known quadrupolar anisotropy parameter $g_{2M}$ the primordial power spectrum, parametrized by $P(\vec{k}) = \bar{P}(k) [ 1 + \sum_{M} g_{2M} Y_{2M}(\hat{k}) ]$, with $M$ determining direction of anisotropy. Such an signal is easily contaminated artificial asymmetries due to specific...
Yes. Future CMB experiments such as Advanced ACTPol and CMB-S4 should achieve measurements with S/N of > 0.1 for the typical host halo galaxies in redshift surveys. These will provide complementary growth rate large scale structure f expansion Universe H to galaxy clustering measurements. This paper emphasizes that there is significant information anisotropy relative pairwise kSZ We expand power spectrum Legendre polynomials consider up its octopole. Assuming noise filtered maps uncorrelated...
We propose an efficient way to test rotational invariance in the cosmological perturbations by use of galaxy correlation functions. In symmetry-breaking cases, power spectrum can have extra angular dependence addition usual one due redshift-space distortion, $\stackrel{^}{k}\ifmmode\cdot\else\textperiodcentered\fi{}\stackrel{^}{n}$. confirm that, via decomposition into not Legendre basis...
Galaxy bispectrum is a promising probe of inflationary physics in the early Universe as measure primordial non-Gaussianity (PNG), whereas its signal-to-noise ratio significantly affected by mode coupling due to nonlinear gravitational growth. In this paper, we examine standard reconstruction method linear cosmic mass density fields from galaxy decorrelate covariance redshift-space bispectra. particular, evaluate for massive-galaxy-sized dark matter halos with using 4000 independent $N$-body...
We present the measurement of kinematic Sunyaev-Zel'dovich (kSZ) effect in Fourier space, rather than real space. measure density-weighted pairwise kSZ power spectrum, first use this promising approach, by cross-correlating a cleaned Cosmic Microwave Background (CMB) temperature map, which jointly uses both Planck Release 2 and Wilkinson Anisotropy Probe nine-year data, with two galaxy samples, CMASS LOWZ, derived fr om Baryon Oscillation Spectroscopic Survey (BOSS) Data 12. With current we...
This paper discusses the science case for a sensitive spectro-polarimetric survey of microwave sky. Such would provide tomographic and dynamic census three-dimensional distribution hot gas, velocity flows, early metals, dust, mass in entire Hubble volume, exploit CMB temperature polarisation anisotropies down to fundamental limits, track energy injection absorption into radiation background across cosmic times by measuring spectral distortions blackbody emission. In addition its exceptional...
Abstract This Science White Paper, prepared in response to the ESA Voyage 2050 call for long-term mission planning, aims describe various science possibilities that can be realized with an L-class space observatory is dedicated study of interactions cosmic microwave background (CMB) photons web. Our aim specifically use CMB as a backlight – and survey gas, total mass, stellar content entire observable Universe by means analyzing spatial spectral distortions imprinted on it. These result from...
We present, for the first time, an observational test of consistency relation large-scale structure (LSS) Universe through a joint analysis anisotropic two- and three-point correlation functions (2PCF 3PCF) galaxies. parameterise breakdown LSS in squeezed limit by $E_{\rm s}$, which represents ratio coefficients shift terms second-order density velocity fluctuations. s}\neq1$ is sufficient condition under violated. A novel aspect this work that we constrain s}$ obtaining information about...
Observations of the kinetic Sunyaev-Zel'dovich (kSZ) effect measure density-weighted velocity field, a potentially powerful cosmological probe. This paper presents an analytical method to predict power spectrum and two-point correlation function in redshift space, direct observables kSZ surveys. We show simple relation between density that holds for both dark matter halos. Using this relation, we can then extend familiar perturbation expansion techniques spectrum. One most important features...
Gastric surface mucous cells originate from progenitor at the isthmus of gastric gland, where migrate to luminal surface. With migration they form secretory granules and express TGF alpha. We found that proprotein-processing endoprotease furin-positive were layered around upper one fourth glands adult rats, whereas distributed along an outer epithelial layer in fetal rats. Because cell was localized proliferating zone less pit-cell region gland unit, we examined role furin growth...
We investigate the relation between regularized multi-propagator method, called "Reg PT", and standard perturbation theory. Reg PT is one of most successful models to describe nonlinear evolution dark matter fluctuations. However, a mathematically unproven interpolation formula large-scale solution calculated by theory limiting in small scale multi-point propagator method. In this paper, we give an alternative explanation for context theory, showing that does not ever have more effective...
We explore the Lagrangian perturbation theory (LPT) at one-loop order with Gaussian initial conditions. present an expansion method to approximately compute power spectrum LPT. Our approximate solution has good convergence in series and enables us LPT accurately quickly. Non-linear corrections this naturally satisfy law of conservation mass because relation between matter density displacement vector dark corresponds mass. By matching two-loop standard theory, we which higher than satisfied....
The consistency relation between non-linear parameters $f_{NL}$ and $\tau_{NL}$ characterizing Non-Gaussianity generated during the inflationary period have been emerged as a useful tool which possibility to rule out large class of models all at once. In our previous work, we extended Suyama-Yamaguchi inequality up 1-loop corrections. this paper, derive an {\it all} loop corrections has same expression with original inequality, $\tau_{NL} \geq (6/5f_{NL})^2$, where equality is not satisfied...
The super-sample tidal effect carries information on long-wavelength fluctuations that we cannot measure directly. It arises from the mode-coupling between short-wavelength and perturbations beyond a finite region of galaxy survey violates statistical isotropy observed power spectra. In this paper, propose use bipolar spherical harmonic (BipoSH) decomposition formalism to characterize statistically anisotropic Using BipoSH formalism, perform comprehensive study tides measurements other...
We investigate a possibility to restrict various inflationary models with nonminimally coupled inflaton field $\ensuremath{\phi}$ by future measurement of nonlinear parameter ${f}_{\mathrm{NL}}$ which characterizes the non-Gaussianity in cosmic microwave background temperature fluctuation. These are related minimally conformal transformation. show that curvature perturbation is invariant under transformation up second order. By using this property we nonminimal coupling...