Accretion process onto super-spinning objects (2009)
Bambi, Cosimo, Freese, Katherine, Harada, Tomohiro, Takahashi, Rohta, Yoshida, Naoki
The accretion process onto spinning objects in Kerr spacetimes is studied with numerical simulations. Our results show that accretion onto compact objects with Kerr parameter (characterizing the...
Early Black Hole Formation by Accretion of Gas and Dark Matter (2009)
Umeda, Hideyuki, Yoshida, Naoki, Nomoto, Ken, Tsuruta, Sachiko, Sasaki, Mei, Ohkubo, Takuya
We propose a model in which intermediate-mass black holes (IMBHs) with mass of ~10000 Msun are formed in early dark matter halos. We carry out detailed stellar evolution calculations for accreting...
Structure Formation in the Early Universe (2009)
The standard theory of cosmic structure formation posits that the present-day rich structure of the Universe developed through gravitational amplification of tiny matter density fluctuations...
Simulations of Wide-Field Weak Lensing Surveys I: Basic Statistics and Non-Gaussian Effects (2009)
Sato, Masanori, Hamana, Takashi, Takahashi, Ryuichi, Takada, Masahiro, Yoshida, Naoki, Matsubara, Takahiko, ...
We study the lensing convergence power spectrum and its covariance for a standard LCDM cosmology. We run 400 cosmological N-body simulations and use the outputs to perform a total of 1000 independent...
The onset of star formation in primordial haloes (2009)
Maio, Umberto, Ciardi, Benedetta, Yoshida, Naoki, Dolag, Klaus, Tornatore, Luca
Star formation remains an unsolved problem in astrophysics. Numerical studies of large-scale structure simulations cannot resolve the whole process and their approach usually assumes that only gas...
Yuexing Li, Philip F. Hopkins, Lars Hernquist, Douglas P. Finkbeiner, Thomas J. Cox, Volker Springel, ...
The detection of large quantities of dust in z ∼ 6 quasars by infrared and radio surveys presents puzzles for the formation and evolution of dust in these early systems. Previously (Li et al....
Yamada, Takumi, Murakami, Yoshimasa, Okada, Taro, Yoshida, Naoki, Toyama, Junji, Yoshida, Yukihiko, ...
Aims The aim of this study was to investigate the change in plasma brain natriuretic peptide (BNP) level after pulmonary vein isolation (PVI) in paroxysmal (PAF), persistent (Pers-AF), and permanent...
Simulations of the formation, evolution and clustering of galaxies and quasars (2005)
Springel, Volker, White, Simon D. M., Jenkins, Adrian, Frenk, Carlos S., Yoshida, Naoki, Gao, Liang, ...
The cold dark matter model has become the leading theoretical picture for the formation of structure in the Universe. This model, together with the theory of cosmic inflation, makes a clear...