Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The University of TokyoJP4.5k papers
- Yukawa Institute for Theoretical PhysicsJP2.7k papers
- The University of OsakaJP2.3k papers
- Nagoya UniversityJP2.2k papers
- High Energy Accelerator Research OrganizationJP2.2k papers
- Centre National de la Recherche ScientifiqueFR2.1k papers
- Tokyo Institute of TechnologyJP2k papers
- University of TsukubaJP1.7k papers
- Brookhaven National LaboratoryUS1.6k papers
- Stony Brook UniversityUS1.5k papers
- Waseda UniversityJP1.5k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.5k papers
1,067 papers · 1 filter
Relativistic Expansion of Magnetic Loops at the Self-similar Stage
Hiroyuki R. Takahashi, Eiji Asano, Ryoji Matsumoto
We obtained self-similar solutions of relativistically expanding magnetic loops taking into account the azimuthal magnetic fields. We neglect stellar rotation and assume axisymmetr…
Disk Winds Driven by Magnetorotational Instability and Dispersal of Proto-Planetary Disks
T. K. Suzuki, S. Inutsuka
By performing local three-dimensional MHD simulations of stratified accretion disks, we investigate disk winds driven by MHD turbulence. Initially given weak vertical magnetic fiel…
Photometric Studies of a WZ Sge-Type Dwarf Nova Candidate, ASAS160048-4846.2
Yuichi Soejima, Akira Imada, Daisaku Nogami +2
We report on our time-resolved CCD photometry during the 2005 June superoutburst of a WZ Sge-type dwarf nova candidate, ASAS 160048-4846.2. The ordinary superhumps underwent a comp…
Evolution of Anemone AR NOAA 10798 and the Related Geo-Effective Flares and CMEs
Ayumi Asai, Kazunari Shibata, Takako T. Ishii +4
We present a detailed examination of the features of the Active Region (AR) NOAA 10798. This AR generated coronal mass ejections (CMEs) that caused a large geomagnetic storm on 24…
Hard X-ray Properties of the Merging Cluster Abell 3667 as Observed with Suzaku
Kazuhiro Nakazawa, Craig L. Sarazin, Madoka Kawaharada +10
Wide-band Suzaku data on the merging cluster Abell 3667 were examined for hard X-ray emission in excess to the known thermal component. Suzaku detected X-ray signals in the wide en…
Spitzer observations of extended Lyman-alpha Clouds in the SSA22 field
T. M. A. Webb, T. Yamada, J. -S. Huang +5
We present the results of a Spitzer IRAC and MIPS 24 micron study of extended Lyman-alpha clouds (or Lyman-alpha Blobs, LABs) within the SSA22 filamentary structure at z = 3.09. We…
AGB Stars in the Fornax Dwarf Spheroidal Galaxy
Patricia A. Whitelock, John W. Menzies, Michael W. Feast +3
We report on a multi-epoch study of the Fornax dwarf spheroidal galaxy, made with the Infrared Survey Facility, over an area of about 42'x42'. The colour-magnitude diagram shows a…
A Chain of Dark Clouds in Projection Against the Galactic Center
Takahiro Nagayama, Shuji Sato, Shogo Nishiyama +9
In the J, H, and Ks bands survey of the the Galactic Center region over an area of 2deg x 5deg, we have found many dark clouds, among which a distinguished chain of dark clouds can…
Molecular Superbubbles and Outflows from Starburst Galaxy NGC 2146
An-Li Tsai, Satoki Matsushita, Kouichiro Nakanishi +7
We present results from a deep (1 sigma = 5.7 mJy beam^{-1} per 20.8 km s^{-1} velocity channel) ^{12}CO(1-0) interferometric observation of the central 60" region of the nearby ed…
Statistical Properties of Gamma-Ray Burst Polarization
Kenji Toma, Takanori Sakamoto, Bing Zhang +6
The emission mechanism and the origin and structure of magnetic fields in gamma-ray burst (GRB) jets are among the most important open questions concerning the nature of the centra…
Possible Effects of Pair Echoes on Gamma-Ray Burst Afterglow Emission
Kohta Murase, Bing Zhang, Keitaro Takahashi +1
High-energy emission from gamma-ray bursts (GRBs) is widely expected but had been sparsely observed until recently when the Fermi satellite was launched. If >TeV gamma rays are pro…
Emergence of hyperons in failed supernovae: trigger of the black hole formation
K. Sumiyoshi, C. Ishizuka, A. Ohnishi +2
We investigate the emergence of strange baryons in the dynamical collapse of a non-rotating massive star to a black hole by the neutrino-radiation hydrodynamical simulations in gen…
Near-Infrared Imaging Polarimetry of S106 Cluster-Forming Region with SIRPOL
Hiro Saito, Motohide Tamura, Ryo Kandori +7
We present the results of wide-field JHKs polarimetry toward the HII region S106 using the IRSF (Infrared Survey Facility) telescope. Our polarimetry data revealed an extended (up…
Broad-Band Spectrum of The Black Hole Candidate IGR J17497-2821 Studied with Suzaku
A. Paizis, K. Ebisawa, H. Takahashi +9
The broad-band 1-300 keV Suzaku spectrum of IGR J17497-2821, the X-ray transient discovered by INTEGRAL in September 2006, is presented. Suzaku observed IGR J17497-2821 on Septembe…
The Stellar Populations of Lyman Break Galaxies at z~5
Kiyoto Yabe, Kouji Ohta, Ikuru Iwata +4
We present the results of Spectral Energy Distribution(SED) fitting analysis for Lyman Break Galaxies(LBGs) at z~5 in the GOODS-N and its flanking fields (the GOODS-FF). With the p…
X-Ray Reflection Nebulae with Large Equivalent Widths of Neutral Iron Ka Line in the Sgr C Region
Hiroshi Nakajima, Takeshi Go Tsuru, Masayoshi Nobukawa +5
This paper reports on the first results of the Suzaku observation in the Sgr C region. We detected four diffuse clumps with strong line emission at 6.4keV, Ka from neutral or low-i…
Magnetic Structure of Umbral Dots Observed with Hinode Solar Optical Telescope
Hiroko Watanabe, Reizaburo Kitai, Kiyoshi Ichimoto +1
High resolution and seeing-free spectroscopic observation of a decaying sunspot was done with the Solar Optical Telescope aboard Hinode satellite. The target was NOAA 10944 located…
Non-Gaussianity in Cosmic Microwave Background Temperature Fluctuations from Cosmic (Super-)Strings
Keitaro Takahashi, Atsushi Naruko, Yuuiti Sendouda +3
We compute analytically the small-scale temperature fluctuations of the cosmic microwave background from cosmic (super-)strings and study the dependence on the string intercommutin…
Implications of Ultra-High-Energy Cosmic Rays for Transient Sources in the Auger Era
Kohta Murase, Hajime Takami
We study about ultra-high-energy cosmic rays (UHECRs) from transient sources, propagating in the Galactic and intergalactic space. Based on the recent observational results, we als…
Non-thermal Electrons at the Earth's Bow Shock: A `Gradual' Event
M. Oka, T. Terasawa, M. Fujimoto +6
Earth's bow shock is known to produce non-thermal electrons which are generally observed as a `spike' in their flux profile. Here, in this paper, we present an analysis of electron…
Chromospheric Anemone Jets as Evidence of Ubiquitous Reconnection
Kazunari Shibata, Tahei Nakamura, Takuma Matsumoto +19
The heating of the solar chromosphere and corona is a long-standing puzzle in solar physics. Hinode observations show the ubiquitous presence of chromospheric anemone jets outside…
Giant Chromospheric Anemone Jet Observed with Hinode and Comparison with Magnetohydrodynamic Simulations: Evidence of Propagating Alfven Waves and Magnetic Reconnection
N. Nishizuka, M. Shimizu, T. Nakamura +4
Hinode discovered a beautiful giant jet with both cool and hot components at the solar limb on 2007 February 9. Simultaneous observations by the Hinode SOT, XRT, and TRACE 195 sate…
POET: POlarimeters for Energetic Transients
J. E. Hill, M. L. McConnell, P. Bloser +15
POET (Polarimeters for Energetic Transients) is a Small Explorer mission concept proposed to NASA in January 2008. The principal scientific goal of POET is to measure GRB polarizat…
GRB 080913 at redshift 6.7
J. Greiner, T. Kruehler, J. P. U. Fynbo +44
We report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations by GROND which led to the discovery of its optical/NIR afterglow and…