Yet Another Realization of Kerr/CFT Correspondence (2009)
Matsuo, Yoshinori, Tsukioka, Takuya, Yoo, Chul-Moon
The correspondence between the Kerr black hole and a boundary CFT has been conjectured recently. The conjecture has been proposed first only for the half of the CFT, namely for left movers. For right...
Another Realization of Kerr/CFT Correspondence (2009)
Matsuo, Yoshinori, Tsukioka, Takuya, Yoo, Chul-Moon
We study another realization of the Kerr/CFT correspondence. By imposing new asymptotic conditions for the near horizon geometry of Kerr black hole, an asymptotic symmetry which contains all of the...
Topology Changing Process of Coalescing Black Holes on Eguchi-Hanson Space (2009)
Kimura, Masashi, Ishihara, Hideki, Tomizawa, Shinya, Yoo, Chul-Moon
We numerically study the event horizons of two kinds of five-dimensional coalescing black hole solutions with different asymptotic structures: the five-dimensional Kastor-Traschen solution (5DKT) and...
Kihara, Hironobu, Nitta, Muneto, Sasaki, Misao, Yoo, Chul-Moon, Zaballa, Ignacio
We study cosmology of the Einstein-Yang-Mills theory in ten dimensions with a quartic term in the Yang-Mills field strength. We obtain analytically a class of cosmological solutions in which the...
Conformal Symmetry for Rotating D-branes (2009)
Cao, Li-Ming, Matsuo, Yoshinori, Tsukioka, Takuya, Yoo, Chul-Moon
We apply the Kerr/CFT correspondence to the rotating black p-brane solutions. These solutions give the simplest examples from string theory point of view. Their near horizon geometries have...
Hoop Conjecture and the Horizon Formation Cross-Section in Kaluza-Klein Spacetimes (2009)
Yoo, Chul-moon, Ishihara, Hideki, Kimura, Masashi, Tanzawa, Sugure
We analyze momentarily static initial data sets of the gravitational field produced by two-point sources in five-dimensional Kaluza-Klein spacetimes which are characterized by mass, separation of...
Ando, Masaki, Kawamura, Seiji, Sato, Shuichi, Nakamura, Takashi, Tsubono, Kimio, Araya, Akito, ...
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory), which is a future space gravitational wave antenna. DECIGO is expected...
Sound Modes in Holographic Hydrodynamics for Charged AdS Black Hole (2009)
Matsuo, Yoshinori, Sin, Sang-Jin, Takeuchi, Shingo, Tsukioka, Takuya, Yoo, Chul-Moon
In the previous paper we studied the transport coefficients of Quark-Gluon Plasma in finite temperature and finite density in vector and tensor modes. In this paper, we extend it to the scalar modes....
Takahashi, Keitaro, Naruko, Atsushi, Sendouda, Yuuiti, Yamauchi, Daisuke, Yoo, Chul-Moon, Sasaki, Misao
We compute analytically the small-scale temperature fluctuations of cosmic microwave background from cosmic (super-)strings and study the dependence on the string intercommuting probability $P$. We...
Ando, Masaki, Kawamura, Seiji, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, ...
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected...
The Japanese space gravitational wave antenna; DECIGO (2008)
Kawamura, Seiji, Ando, Masaki, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. DECIGO is expected to open a new window of observation for gravitational...
Solving the Inverse Problem with Inhomogeneous Universes (2008)
Yoo, Chul-Moon, Kai, Tomohiro, Nakao, Ken-ichi
We construct the Lema\^itre-Tolman-Bondi (LTB) dust universe whose distance-redshift relation is equivalent to that in the concordance $\Lambda$ cold dark matter ($\Lambda$CDM) cosmological model. In...
Magnification Probability Distribution Functions of Standard Candles in a Clumpy Universe (2007)
Yoo, Chul-Moon, Ishihara, Hideki, Nakao, Ken-ichi, Tagoshi, Hideyuki
Lensing effects on light rays from point light sources, such like Type Ia supernovae, are simulated in a clumpy universe model. In our universe model, it is assumed that all matter in the universe...
Horizons of Coalescing Black Holes on Eguchi-Hanson Space (2007)
Yoo, Chul-Moon, Ishihara, Hideki, Kimura, Masashi, Matsuno, Ken, Tomizawa, Shinya
Using the numerical method, we study dynamics of coalescing black holes on the Eguchi-Hanson base space. Effects of a difference in spacetime topology on the black hole dynamics is discussed. We...
Can inhomogeneties accelerate the cosmic volume expansion? (2006)
Kai, Tomohiro, Kozaki, Hiroshi, Nakao, Ken-ichi, Nambu, Yasusada, Yoo, Chul-Moon
If expanding and contracting regions coexist in the universe, the speed of the cosmic volume expansion can be accelerated. We construct simple inhomogeneous dust-filled universe models in which the...
Yoo, Chul-Moon, Nakao, Ken-ichi, Kozaki, Hiroshi, Takahashi, Ryuichi
The distance-redshift relation determined by means of gravitational waves in the clumpy universe is simulated numerically by taking into account the effects of gravitational lensing. It is assumed...
Hoop Conjecture in Five-dimensios -Violation of Cosmic Censorship- (2005)
Yoo, Chul-Moon, Nakao, Ken-ichi, Ida, Daisuke
We study the condition of black hole formation in five-dimensional space-time. We analytically solve the constraint equations of five-dimensional Einstein equations for momentarily static and...
Quasinormal Ringing for Acoustic Black Holes at Low Temperature (2004)
Nakano, Hiroyuki, Kurita, Yasunari, Ogawa, Kouji, Yoo, Chul-Moon
We investigate a condensed matter ``black hole'' analogue, taking the Gross-Pitaevskii (GP) equation as a starting point. The linearized GP equation corresponds to a wave equation on a black hole...