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160 papers · 1 filter
Generalized Lyapunov exponent as a unified characterization of dynamical instabilities
Takuma Akimoto, Masaki Nakagawa, Soya Shinkai +1
The Lyapunov exponent characterizes an exponential growth rate of the difference of nearby orbits. A positive Lyapunov exponent is a manifestation of chaos. Here, we propose the Ly…
Doppler Tomography by Total Variation Minimization
Makoto Uemura, Taichi Kato, Daisaku Nogami +1
We have developed a new model of the Doppler tomography using total variation minimization (DTTVM). This method can reconstruct localized and non-axisymmetric profiles having sharp…
Unconventional Superconductivity in electron-doped layered metal nitride halides N ( = Ti, Zr, Hf; = Cl, Br, I)
Yuichi Kasahara, Kazuhiko Kuroki, Shoji Yamanaka +1
In this review, we present a comprehensive overview of superconductivity in electron-doped metal nitride halides N ( = Ti, Zr, Hf; = Cl, Br, I) with layered crystal st…
Engineering Dirac electrons emergent on the surface of a topological insulator
Yukinori Yoshimura, Koji Kobayashi, Tomi Ohtsuki +1
The concept of topological insulator (TI) has introduced a new point of view to condensed-matter physics, relating a priori unrelated subfields such as quantum (spin, anomalous) Ha…
Dust from Comet 209P/LINEAR during its 2014 Return: Parent Body of a New Meteor Shower, the May Camelopardalids
Masateru Ishiguro, Daisuke Kuroda, Hidekazu Hanayama +29
We report a new observation of the Jupiter-family comet 209P/LINEAR during its 2014 return. The comet is recognized as a dust source of a new meteor shower, the May Camelopardalids…
ASTRO-H White Paper - Broad-band Spectroscopy and Polarimetry
P. Coppi, L. Stawarz, C. Done +13
The broad energy range spanned by ASTRO-H instruments, from ~0.3 to 600 keV, with its high spectral resolution calorimeter and sensitive hard X-ray imaging, offers unique opportuni…