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Reconstructing the Peak Distribution in the Sunyaev-Zeldovich Effect Surveys
Jounghun Lee, Naoki Yoshida
We examine the ability of the Sunyaev-Zel'dovich effect (SZE) statistics proposed by Lee (2002) using numerical simulations. The statistics describe the distribution of the peak he…
Searching for massive clusters in weak lensing surveys
Takashi Hamana, Masahiro Takada, Naoki Yoshida
We explore the ability of weak lensing surveys to locate massive clusters. We use both analytic models of dark matter halos and mock weak lensing surveys generated from a large cos…
The Era of Massive Population III Stars: Cosmological Implications and Self-Termination
Naoki Yoshida, Volker Bromm, Lars Hernquist
The birth and death of the first generation of stars have important implications for the thermal state and chemical properties of the intergalactic medium (IGM) in the early univer…
Can Non-Gaussian Cosmological Models Explain the WMAP's High Optical Depth for Reionization?
Xuelei Chen, Asantha Cooray, Naoki Yoshida +1
The first-year Wilkinson Microwave Anisotropy Probe data suggest a high optical depth for Thomson scattering of 0.17 +/- 0.04, implying that the universe was reionized at an early…
Dark matter annihilation in the halo of the Milky Way
Felix Stoehr, Simon D. M. White, Volker Springel +2
If the dark matter in the Universe is made of weakly self-interacting particles, they may self-annihilate and emit gamma-rays. We use high resolution numerical simulations to estim…
The Evolution of Baryon Density Fluctuations in Multi-Component Cosmological Simulations
Naoki Yoshida, Naoshi Sugiyama, Lars Hernquist
We critically examine how the evolution of the matter density field in cosmological simulations is affected by details of setting up initial conditions. We show that it is non-triv…