287 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The University of TokyoJP65 papers
- Kyoto UniversityJP56 papers
- National Astronomical Observatory of JapanJP28 papers
- Japan Science and Technology AgencyJP16 papers
- Tohoku UniversityJP16 papers
- Kyushu UniversityJP13 papers
- Institute of Space and Astronautical ScienceJP12 papers
- Nagoya UniversityJP11 papers
- Centre National de la Recherche ScientifiqueFR8 papers
- Pennsylvania State UniversityUS8 papers
- The University of OsakaJP7 papers
- University of California, BerkeleyUS7 papers
14 papers · 1 filter
Enhancement of the irreversibility field by carbon substitution in single crystal MgB
E. Ohmichi, T. Masui, S. Lee +2
We report the detailed study of the irreversibility field {\hirr} of single crystals of Mg(BC) (=0, 2, 3.5, 5 and 7%) in strong magnetic fields of up to 40 T.…
A General Formulation of the Source Confusion Statistics and Application to Infrared Galaxy Surveys
Tsutomu T. Takeuchi, Takako T. Ishii
Source confusion has been a long-standing problem in the astronomical history. In the previous formulation, sources are assumed to be distributed homogeneously on the sky. This fun…
Faint 6.7um Galaxies and their Contributions to the Stellar Mass Density in the Universe
Yasunori Sato, Lennox L. Cowie, Kimiaki Kawara +6
We discuss the nature of faint 6.7um galaxies detected with the mid-infrared camera ISOCAM on board the Infrared Space Observatory (ISO). The 23 hour integration on the Hawaii Deep…
The origin of optical emission from super-Eddington accreting Active Galactic Nuclei: the case of Ton S 180
T. Kawaguchi, A. Pierens, J. -M. Hure
Self-gravitating accretion discs have only been studied in a few nearby objects using maser spots at the parsec-scale. We find a new spectral window for observing the self-gravitat…
Sgr A East and its surroundings observed in X-rays
Masaaki Sakano, Robert S. Warwick, Anne Decourchelle
We report the results of an XMM-Newton observation of Sgr A East and its surroundings. The X-ray spectrum of Sgr A East is well represented with a two-temperature plasma model with…
Near-Infrared Colors of Gamma-Ray Burst Afterglows and Cosmic Reionization History
Akio K. Inoue, Ryo Yamazaki, Takashi Nakamura
Using the near-infrared (NIR) observations of the afterglows of the high redshift ($5 \la z \la 25$) gamma-ray bursts (GRBs) which will be detected by the {\it Swift} satellite, we…
Carbon-substituted MgB2 single crystals
Sergey Lee, Takahiko Masui, Ayako Yamamoto +2
Carbon-substituted MgB2 single crystals, Mg(B_1-xC_x)_2 of 0.3-1.0 mm size were grown for x=0.02-0.15 by a high-pressure technique. The doping dependence of lattice constants studi…
A New Method to Map Flares in Quasars
Atsunori Yonehara, Shin Mineshige, Yoh Takei +2
Recently, Chartas et al. (2001) detected a rapid X-ray flare in the gravitationally lensed, multiple image quasar RX J0911.4+0551. Dramatic events, such as rapid X-ray flares, are…
Re-appearance of antiferromagnetic ordering with Zn and Ni substitution in La_{2-x}Sr_xCuO_4
T. Machi, I. Kato, R. Hareyama +5
The effects of nonmagnetic Zn and magnetic Ni substitution for Cu site on magnetism are studied by measurements of uniform magnetic susceptibility for lightly doped La_{2-x}Sr_xCu_…
Comptonization in Super-Eddington Accretion Flow and Growth Timescale of Supermassive Black Holes
Toshihiro Kawaguchi
Super-Eddington accretion onto black holes (BHs) may occur at ultraluminous compact X-ray sources in nearby galaxies, Galactic microquasars and narrow-line Seyfert 1 galaxies (NLS1…
Superconductivity in SrRuO Mediated by Coulomb Scattering
Shigeru Koikegami, Yoshiyuki Yoshida, Takashi Yanagisawa
We investigate the superconductivity in SrRuO on the basis of the three-dimensional three-band Hubbard model. We propose a model with Coulomb interactions among the electro…
The Luminosity Function of IRAS PSCz Galaxies
Tsutomu T. Takeuchi, Kohji Yoshikawa, Takako T. Ishii
We estimated the luminosity function (LF) of IRAS galaxies in the PSCz catalogue. The faint end of the PSCz LF is slightly steeper than that of the LF derived by Saunders et al. (1…
Zn-Neighbor Cu NQR in Zn-Substituted YBa2Cu3O7-d and YBa2Cu4O8
Y. Itoh, T. Machi, C. Kasai +4
We studied local electronic states near Zn in optimally doped YBa(CuZn_x)O and underdoped YBa(CuZn_x)O via satellite signals of plane-si…
Coexistence of Charge Order and Spin-Peierls Lattice Distortion in One-Dimensional Organic Conductors
Makoto Kuwabara, Hitoshi Seo, Masao Ogata
The electronic properties of quarter-filled organic materials showing spin-Peierls transition are investigated theoretically. By studying the one-dimensional extended Peierls-Hubba…