383 citations · 3.2k across the 50 of their papers we have counts for
3 papers · 2 filters
Volume Expansion Rate and The Age of The Universe
Takashi Nakamura, Ken-ichi Nakao, Takeshi Chiba +1
Under four assumptions such that 1) Einstein's theory of gravity is correct, 2) existence of foliation by geodesic slicing, 3) the trace of the extrinsic curvature, , is negativ…
The Microlensing and Halo Models of the Galaxy
Yukitoshi Kan-ya, Ryoichi Nishi, Takashi Nakamura
We investigated the dependence of the optical depth of the microlensing events on model parameters of the Galactic halo. We only consider Galactic mass models in which the rota…
Hubble Parameter in Void Universe
Ken-ichi Nakao, Naoteru Gouda, Takeshi Chiba +3
We investigate the distance-redshift relation in the simple void model. As discussed by Moffat and Tatarski, if the observer stays at the center of the void, the observed Hubble pa…