Kentaro Asano
A5084659533- Adaptive optics and wavefront sensing
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Astronomical Observations and Instrumentation
- Optical Systems and Laser Technology
- Advanced optical system design
- Gamma-ray bursts and supernovae
- Optical Coatings and Gratings
- Infrared Target Detection Methodologies
- Galaxies: Formation, Evolution, Phenomena
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Astrophysics and Cosmic Phenomena
- Superconducting and THz Device Technology
- Photonic and Optical Devices
- Astro and Planetary Science
- Ionosphere and magnetosphere dynamics
- Planetary Science and Exploration
- Radio Wave Propagation Studies
- Meteorological Phenomena and Simulations
- Ultrasound and Cavitation Phenomena
- Particle Detector Development and Performance
- Surface Modification and Superhydrophobicity
The University of Tokyo
2010-2023
University of Denver
2016-2018
Keio University
2018
Japan Aerospace Exploration Agency
2016
Institute of Space and Astronautical Science
2016
Tokyo Metropolitan University
2010
Toyo University
2007
Ritsumeikan University
1996
Luminous infrared galaxies (LIRGs) are enshrouded by a large amount of dust produced their active star formation, and it is difficult to measure activity in optical wavelengths. We have carried out Paα narrow-band imaging observations 38 nearby forming including 33 LIRGs listed the IRAS Revised Bright Galaxy Sample catalog with Atacama Near InfraRed camera on University Tokyo Observatory (TAO) 1.0 m telescope (miniTAO). Star formation rates (SFRs) estimated from fluxes, corrected for...
The near-Earth asteroid (308635) 2005 YU55 is a potentially hazardous which was discovered in and passed Earth on November 8th 2011 at 0.85 lunar distances. This the closest known approach by an of several hundred metre diameter since 1976 when similar size object 0.5 We observed from ground with recently developed mid-IR camera (miniTAO/MAX38) N- Q-band Submillimeter Array (SMA) 1.3 mm. In addition, we obtained space observations Herschel/PACS 70, 100, 160 micron. Our thermal measurements...
Abstract We have developed a near-infrared camera called ANIR (Atacama Near-InfraRed camera) for the University of Tokyo Atacama Observatory 1.0 m telescope (miniTAO) installed at summit Cerro Chajnantor (5640 above sea level) in north Chile. The provides field view 5${^{\prime}_{.}}$1 × with spatial resolution 0${^{\prime\prime}_{.}}$298 pixel−1 wavelength range 0.95 to 2.4 μm, using Offner relay optics and PACE HAWAII-2 focal plane array. Taking advantage dry site, is capable narrow-band...
We successfully carried out 30-micron observations from the ground-based telescope for first time with our newly developed mid-infrared instrument, MAX38, which is mounted on University of Tokyo Atacama 1.0-m (miniTAO telescope). Thanks to high altitude miniTAO (5,640m) and dry weather condition site, we can access wavelength region telescopes. To achieve observation at 30- micron wavelength, remarkable devices are employed in MAX38. First, a Si:Sb 128x128 array detector installed detect...
Simultaneous-color Wide-field Infrared Multi-object Spectrograph, SWIMS, is one of the first generation instruments for University Tokyo Atacama Observatory 6.5m Telescope where almost continuous atmospheric window from 0.9 to 2.5μm appears, thanks high altitude and dry climate site. To utilize this excellent condition, SWIMS capable simultaneous two-color imaging with a field view 9'. in diameter λ/Δλ ~1000 multi-object spectroscopy at 0.9–2.5μm single exposure, utilizing dichroic mirror...
TAO (The University of Tokyo Atacama Observatory) is planned to be constructed at the summit Co. Chajnantor (5640 m altitude) in Chile. MIMIZUKU (Mid-Infrared Multi-field Imager for gaZing UnKnown Universe) a mid-infrared imager (Field View: 1' x 1'- 2' 2') and spectrometer (Δλ/λ: 60-230) 6.5-m telescope, covering wavelength range 2-38 μm. The has unique equipment called Field Stacker (FS) which enables simultaneous observation target reference object. simultaneity expected improve...
The MIMIZUKU is the first-generation mid-infrared instrument for TAO 6.5-m telescope. It challenges to prove origin of dust and formation planets with its unique capabilities, wide wavelength coverage precise calibration capability. (2-38 μm) achieved by three switchable cameras, NIR, MIR-S, MIR-L. specifications cameras are revised. A 5μm-cutoff HAWAII-1RG decided be installed in NIR camera. optical design MIR-L camera modified avoid detector saturation. Its final F-number extended from 5.2...
MIMIZUKU is the first-generation mid-infrared instrument for university of Tokyo Atacama Observatory (TAO) 6.5-m telescope. provides imaging and spectroscopic monitoring capabilities in a wide wavelength range from 2 to 38 μm, including unique bands like 2.7-μm 30-μm band. Recently, we decided add functions, KL-band mode (λ= 2.1-4.0 μm; R =λ/Δλ ~ 210) band ( λ= 2.4-2.95 620), continuous coverage 2.1 26 μm realized by this update. Their optical designing completed, fabrications elements are...
We present the observation of a charge-sign dependent solar modulation galactic cosmic rays (GCRs) with Calorimetric Electron Telescope onboard International Space Station over 6 yr, corresponding to positive polarity magnetic field. The observed variation proton count rate is consistent neutron monitor rate, validating our methods for determining rate. It by that both GCR electron and rates at same average rigidity vary in anticorrelation tilt angle heliospheric current sheet, while...
Ground-based mid-infrared observations have two distinct advantages over space despite relatively lower sensitivity. One is the high spatial resolution and other monitoring capability. These can be emphasized particularly for next coming ground-based infrared project University of Tokyo Atacama Observatory (TAO). Thanks to low water vapor TAO site (5,640m) large aperture telescope (6.5meter), we observe at 30 micron with a 1 arcsec. It about ten times higher than that current telescopes. The...
Simultaneous Color Wide-field Infrared Multi-object Spectrograph, SWIMS, is one of the first generation in- struments for University Tokyo Atacama Observatory (TAO) 6.5m Telescope now under construction. A dichroic mirror being inserted in collimated beam, it capable two-color simultaneous imaging with FoV 9:16φ or R ∼ 1000 multi-object spectroscopy at 0.9–2.5μm wavelength range shot, and enables us to carry out efficient NIR imaging/spectroscopic survey objects such as distant galaxies...
We have developed a near infrared camera called ANIR (Atacama Near InfraRed camera) for the University of Tokyo Atacama 1.0m telescope installed at summit Co. Chajnantor (5640m altitude) in northern Chile. The is based on PACE HAWAII-2 array with an Offner relay optics re-imaging, and field view 5. 3 × pixel scale 0. 31/pix. It also capable optical/infrared simultaneous imaging by inserting dichroic mirror before focal plane. high altitude extremely low water vapor (PWV=0.5mm) site enables...
Thirty micron has remained one of unexplored frontiers ground-based astronomical observations. Recent developments extreme high sites including the Chajnantor TAO site (5,640m) enable us to access this wavelengths from ground. The expected transmittance seems clear enough for observations, but practical evaluations based on data not been carried out yet. We have analyzed images obtained at 31.7 with a mid-infrared camera MAX38 attached mini-TAO 1.0-meter telescope. 109 star IRC+10420 and...
ANIR (Atacama Near InfraRed camera) is a near infrared camera for the University of Tokyo Atacama 1.0m telescope installed at summit Co. Chajnantor (5640m altitude) in northern Chile. The high altitude and extremely low water vapor (precipitable vapor:PWV=0.5mm) site enables us to perform observation hydrogen Paschen alpha (Paα) emission line 1.8751 μm. Since first light June 2009, we have succesfully obtained Paα narrow-band images Galactic objects near-by Galaxies. However, as there are...
We have evaluated on-sky performances of a mid-infrared camera MAX38 (Mid-infrared Astronomical eXploerer) on the miniTAO 1-meter telescope. A Strehl ratio at N-band is estimated to be 0.7-0.8, and it reaches 0.9 37.7 micron, indicating that diffraction limited angular resolution almost achieved wavelength range from 8 38 micron. System efficiencies N Q-band are with photometry standard stars. The sensitivity 30 micron cannot exactly because there no stars bright enough. use sky brightness...
Strong time variation of atmospheric transmittance is a crucial problem for monitoring observations at mid- infrared wavelengths from the ground. To overcome this problem, new device called "Field Stacker" has been developed. It an optical to combine two discrete fields in telescope FoV into single field and feed it camera. enables us observe science target reference star simultaneously, improve photometric accuracy dramatically based on real-time calibration. practically achieve highly...
We have been developing high-throughput optical elements with the moth-eye structures for mid-infrared systems. The are optimized wavelength of 25-45μm. It consists cones a height 15-20μm arranged at an interval 5μm. They formed on silicon substrate by electron-beam lithography and reactive ion etching. As verification usefulness moth-eye, double-sided plane was fabricated. shows transmittance increase 60% compared unprocessed plane. first trial element, two lenses single-sided were One is...
We investigate the polycyclic aromatic hydrocarbon (PAH) features in young Galactic planetary nebula PN G095.2+00.7 based on mid-infrared observations. The near- to spectra obtained with AKARI/IRC and Spitzer/IRS show PAH as well broad emission feature at 12 μm usually seen proto-planetary nebulae (pPNe). spatially resolved Subaru/COMICS suggest that around is distributed a shell-like structure, but unidentified infrared band 11.3 selectively enhanced southern part of nebula. variation can...
MIMIZUKU is a mid-infrared imager and spectrograph being developed for the University of Tokyo Atacama Observatory (TAO) 6.5-m telescope (PI: Y. Yoshii). To fully utilize high atmospheric transmission Chajnantor site, covers wide wavelength range from 2 to 38 μm with three array detectors: HAWAII-1RG HgCdTe 1024 × 5 cutoff manufactured by Teledyne, an Aquarius Si:As IBC Raytheon, MF-128 Si:Sb BIB 128 DRS. We have newly controller system operate these multiple arrays. A sampling rate higher...
The Simultaneous-color Wide-field Infrared Multi-object Spectrograph (SWIMS) is one of the 1st generation facility instruments for University Tokyo Atacama Observatory (TAO) 6.5 m telescope currently being constructed at summit Cerro Chajnantor (5,640 altitude) in northern Chile. SWIMS has two optical arms, blue arm covering 0.9–1.4 µm and red 1.4–2.5 µm, by inserting a dichroic mirror into collimated beam, thus capable taking images filter-bands simultaneously imaging mode, or whole...
The Mid-Infrared Multi-field Imager for gaZing at the UnKnown Universe (MIMIZUKU) is developed as first-generation mid-infrared instrument University of Tokyo Atacama Observatory (TAO) 6.5-m telescope. MIMIZUKU performs medium-band imaging and low-resolution spectroscopy in 2-38 microns enables highest-spatial-resolution observations long-wavelength beyond 25 microns. In addition, has a unique opto-mechanical device called 'Field Stacker', which us to observe distant (<25 arcminutes) pair...