497 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Institute of TechnologyJP21 papers
- National Astronomical Observatory of JapanJP13 papers
- Kyoto UniversityJP11 papers
- The University of TokyoJP11 papers
- Institute of Astronomy and Astrophysics, Academia SinicaTW10 papers
- The Graduate University for Advanced Studies, SOKENDAIJP10 papers
- Ehime UniversityJP9 papers
- National Tsing Hua UniversityTW7 papers
- Tohoku UniversityJP7 papers
- Daido UniversityJP6 papers
- Centre National de la Recherche ScientifiqueFR5 papers
- Institute of Space and Astronautical ScienceJP5 papers
5 papers · 1 filter
General formulae for the periapsis shift of a quasi-circular orbit in static spherically symmetric spacetimes and the active gravitational mass density
Tomohiro Harada, Takahisa Igata, Hiromi Saida +1
We study the periapsis shift of a quasi-circular orbit in general static spherically symmetric spacetimes. We derive two formulae in full order with respect to the gravitational fi…
Periapsis shifts in dark matter distribution with a dense core
Takahisa Igata, Yohsuke Takamori
We consider the periapsis shifts in dark matter distribution with a dense core. We model the dark matter distribution as an isotropic gas sphere, the Emden polytropic sphere of ind…
Periapsis shifts in dark matter distribution around a black hole
Takahisa Igata, Tomohiro Harada, Hiromi Saida +1
We consider the periapsis shifts of bound orbits of stars on static clouds around a black hole. The background spacetime is constructed from a Schwarzschild black hole surrounded b…
Testing the Non-circularity of the Spacetime around Sagittarius A* with Orbiting Pulsars
Yohsuke Takamori, Atsushi Naruko, Yusuke Sakurai +3
A disformal Kerr black hole solution is a rotating black hole solution in a modified gravity theory which breaks the circular condition of spacetime differently from the case of th…
A Significant Feature in the General Relativistic Time Evolution of the Redshift of Photons Coming from a Star Orbiting Sgr A*
Hiromi Saida, Shogo Nishiyama, Takayuki Ohgami +16
The star S0-2, orbiting the Galactic central massive black hole candidate Sgr A*, passed its pericenter in May 2018. This event is the first chance to detect the general relativist…