A5006302366- Dark Matter and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Optical Systems and Laser Technology
- CCD and CMOS Imaging Sensors
- Particle Detector Development and Performance
- Stellar, planetary, and galactic studies
- Advanced Topics in Algebra
- Calibration and Measurement Techniques
- Homotopy and Cohomology in Algebraic Topology
- Algebraic structures and combinatorial models
- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- Advanced Algorithms and Applications
- Optical measurement and interference techniques
Kyoto Sangyo University
2022
Tohoku University
2016
The identity of dark matter has been a mystery in astronomy, cosmology, and particle theory for about century. We present the first search with high-dispersion spectrograph by using WINERED at 6.5 m Magellan Clay telescope to measure photons from decays. dwarf spheroidal galaxies (dSphs) Leo V Tucana II are observed utilizing an object-sky-object nodding observation technique. Employing zero consistent flux data after sky subtraction performing Doppler shift analysis further background...
Infrared spectroscopy has been developed significantly. In particular, infrared photons can be measured with high spectral and angular resolution in state-of-art spectrographs. They are sensitive to monochromatic due the decay annihilation of particles beyond Standard Model, such as dark matter (DM), while suppressing background that form a continuous spectrum. this paper, we study indirect detection DM decaying into light using show serious thermal astrophysical noises overcome. As concrete...
We construct a topological sigma model and current algebra based on Courant algebroid structure Poisson manifold. In order to models, we reformulate the by supergeometric construction QP-manifold. A new duality of algebroids which transforms H-flux R-flux is proposed, where transformation interpreted as canonical graded symplectic
The identity of dark matter has been a mystery in astronomy, cosmology, and particle theory for about century. Bessho, Ikeda, Yin (2022), three the current authors, proposed using state-of-the-art infrared spectrographs, including WINERED at $6.5$m Magellan Clay telescope NIRSpec James Webb Space Telescope, as efficient detectors indirect detection with mass around eV by measuring line photons from two body decays. Applying this concept, we have performed spectrographic observations dwarf...
Abstract We investigate the raw-contrast mitigation ability of spectroscopic coronagraph. consider a mis-modulation complex amplitude by transmissive focal-plane mask that is an intrinsic problem dependent on spectral resolving power grating in coronagraph, stellar angular radius, and non-common path error (NCP) due to chromaticity active wavefront control (WFC) as limitation factors performance Concerning impact radius under assumption with achromatic WFC, we found coronagraph potentially...
Compact refractive adaptive optics (CRAO) is a visible compact (AO) system optimized for small telescopes. It was mounted on the 1.3 m Araki telescope of Koyama Astronomical Observatory (KAO) in Kyoto Sangyo University, Japan. CRAO aims to improve natural seeing 3" 0.8" at 500 nm KAO site. Thus, it needs large format and highly frequent camera wide field survey (WFS) largely segmented depth map (DM) because ∼3" site especially poor astronomical observations. To performance with new WFS DM,...
Infrared spectroscopy has been developed significantly. In particular, infrared photons can be measured with high spectral and angular resolution in state-of-art spectrographs. They are sensitive to monochromatic due the decay annihilation of particles beyond Standard Model, such as dark matter (DM), while suppressing background that form a continuous spectrum. this paper, we study indirect detection DM decaying into light using show serious thermal astrophysical noises overcome. As concrete...