Taihei Yano

A Universal Profile of the Dark Matter Halo and the Two-Point Correlation Function

We have found the relation between the two-point spatial correlation function and the density profile of dark matter halos in the strongly nonlinear regime. It is well known that when the density fluctuations grow into dark matter halos whose density profile is ρ ∝ r-(3/2 3/2, and then the two-point spatial correlation function can be regarded as the power law. The velocity parameter h becomes zero at the nonlinear limit of → 0, that is, the stable clustering hypothesis cannot be satisfied when < 3/2.

Uncovering the identities of compact objects in high-mass X-ray binaries and gamma-ray binaries by astrometric measurements

We develop a method for identifying a compact object in binary systems with astrometric measurements and apply it to some binaries. Compact objects in some high-mass X-ray binaries and gamma-ray binaries are unknown, which is responsible for the fact that emission mechanisms in such systems have not yet confirmed. The accurate estimate of the mass of the compact object allows us to identify the compact object in such systems. Astrometric measurements are expected to enable us to estimate the masses of the compact objects in the binary systems via a determination of a binary orbit. We aim to evaluate the possibility of the identification of the compact objects for some binary systems. We then calculate probabilities that the compact object is correctly identified with astrometric observation (= confidence level) by taking into account a dependence of the orbital shape on orbital parameters and distributions of masses of white dwarfs, neutron stars, and black holes. We find that the astrometric measurements with the precision of 70

JASMINE – design and method of data reduction

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Scale-Invariant Correlation Functions of Cosmological Density Fluctuations in the Strong Clustering Regime and the Stability

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Dynamical effects of the spiral arms on the velocity distribution of disc stars

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小型JASMINE(赤外線位置天文観測衛星）計画の全体的概要

~Cas allows us to identify the compact object at 99% confidence level if the compact object is a white dwarf with 0.6 M

Nano-JASMINEデータ解析: GaiaソフトウエアAGISの適用

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JASMINE（赤外線位置天文観測衛星）－観測手法や熱解析を中心にー

. In addition, we can identify the compact object with the precision of 10

JASMINE(赤外線位置天文観測衛星）計画 ～全般的概要と最近の動き～

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Universality in the distribution of caustics

as at 97% or larger confidence level for LS~I~+61