282 citations · 2.4k across the 83 of their papers we have counts for
5 papers · 1 filter
Possible measurement of Quintessence and density parameter using strong gravitational lensing events
Toshifumi Futamase, Shijun Yoshida
We propose a possible measurement of the time variability of the vacuum energy using strong gravitational lensing events. As an example we take an Einstein cross lens HST 14176+522…
Number Count of Peaks in the CMB Map
Toshifumi Futamase, Masahiro Takada
We investigate the dependence of cosmological parameters on the number count of peaks (local maxima and minima) in the cosmic microwave background (CMB) sky. The peak statistics co…
Detectability of Gravitational Lensing Effect on the Two-point Correlation Function of Hotspots in the CMB maps
Masahiro Takada, Toshifumi Futamase
We present quantitative investigations of the weak lensing effect on the two-point correlation functions of local maxima (hotspots), $\xipk(θ)$, in the cosmic microwave background…
On the abundance of collapsed objects
Martin Kerscher, Thomas Buchert, Toshifumi Futamase
The redshift dependence of the abundance of collapsed objects places strong constraints on cosmological models of structure formation. We apply a recently proposed model describing…
Cluster Mass Reconstruction by a Weak Shear Field
Keiichi Umetsu, Masashi Tada, Toshifumi Futamase
The tidal gravitational field of galaxy clusters causes a coherent distortion of the images of background sources. Since the distribution of image distortions, namely the shear fie…