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Patchy He II reionization and the physical state of the IGM
Liron Gleser, Adi Nusser, Andrew J. Benson +2
We present a Monte-Carlo model of He II reionization by QSOs and its effect on the thermal state of the clumpy intergalactic medium (IGM). The model assumes that patchy reionizatio…
Does Positronium Form in the Universe ?
Takeshi Chiba, Naoshi Sugiyama
Positronium (the bound state of electron and positron) has been thought to be formed after proton decay (yr) through collisional recombination and then decays by pair ann…
Gravitational Waves from Supermassive Black Hole Coalescence in a Hierarchical Galaxy Formation Model
Motohiro Enoki, Kaiki T. Inoue, Masahiro Nagashima +1
We investigate the expected gravitational wave emission from coalescing supermassive black hole (SMBH) binaries resulting from mergers of their host galaxies. When galaxies merge,…