409 citations · 829 across the 11 of their papers we have counts for
6 papers · 1 filter
The Formation of Population III Binaries
Kazuya Saigo, Tomoaki Matsumoto, Masayuki Umemura
We explore the possibility for the formation of Population III binaries. The collapse of a rotating cylinder is simulated with a three-dimensional, high-resolution nested grid, ass…
Obscuration of Active Galactic Nuclei by Circumnuclear Starbursts
Yasuyuki Watabe, Masayuki Umemura
We examine the possibility of the active galactic nucleus (AGN) obscuration by dusty gas clouds that spurt out from circumnuclear starburst regions. For the purpose, the dynamical…
A Strong Lyman-alpha Emitter at z=6.33 in the Subaru Deep Field Selected as an i' Dropout
T. Nagao, Y. Taniguchi, N. Kashikawa +37
We report on the discovery of a star-forming galaxy at z=6.33 in the Subaru Deep Field. This object is selected as a candidate of an i'-dropout, high-redshift galaxy around z=6 bec…
Gas stripping by radiation drag from an interstellar cloud
Jun'ichi Sato, Masayuki Umemura, Keisuke Sawada +1
We perform two-dimensional hydrodynamic simulation on the gas stripping by radiation drag from an interstellar cloud moving in uniform radiation fields. To properly include relativ…
Effects of Early Cosmic Reionization on the Substructure Problem in Galactic Halo
Hajime Susa, Masayuki Umemura
Recent observations on the cosmic microwave background by Wilkinson Microwave Anisotropy Probe(WMAP) strongly suggest that the reionization of the universe took place quite early (…
The Structure and Evolution of Early Cosmological HII Regions
T. Kitayama, N. Yoshida, H. Susa +1
We study the formation and evolution of HII regions around the first stars formed at z=10-30. We use a one-dimensional Lagrangian hydrodynamics code which self-consistently incorpo…