A5074631233- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Planetary Science and Exploration
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Isotope Analysis in Ecology
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Calibration and Measurement Techniques
- CCD and CMOS Imaging Sensors
- Space Science and Extraterrestrial Life
- History and Developments in Astronomy
- EEG and Brain-Computer Interfaces
- Solar and Space Plasma Dynamics
- Radio Astronomy Observations and Technology
- Advanced Optical Sensing Technologies
- Medical Imaging Techniques and Applications
- Historical and Architectural Studies
- Geomagnetism and Paleomagnetism Studies
- Geophysics and Gravity Measurements
- Molecular Spectroscopy and Structure
- Visual perception and processing mechanisms
- Tactile and Sensory Interactions
University of Hawaiʻi at Mānoa
2023-2024
University of Hawaii System
2023-2024
University of California, Los Angeles
2023
Planetary Science Institute
2023
City College
2014
City College of New York
2014
The Graduate Center, CUNY
2014
New Mexico Institute of Mining and Technology
2006
University of Michigan
1995
Michigan United
1995
Abstract We present the direct-imaging discovery of a substellar companion (a massive planet or low-mass brown dwarf) to young, γ Doradus ( Dor)-type variable star HIP 39017 (HD 65526). The companion’s SCExAO/CHARIS JHK (1.1–2.4 μ m) spectrum and Keck/NIRC2 <?CDATA $L^{\prime} $?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>L</mml:mi> <mml:mo accent="false">′</mml:mo> </mml:math> photometry indicate that it is an L/T transition object. A comparison + L...
We present the direct-imaging discovery of a substellar companion (a massive planet or low-mass brown dwarf) to young, $\gamma$ Doradus-type variable star, HIP 39017 (HD 65526). The companion's SCExAO/CHARIS JHK ($1.1-2.4\mu$m) spectrum and Keck/NIRC2 L$^{\prime}$ photometry indicate that it is an L/T transition object. A comparison JHK+L$^{\prime}$ several atmospheric model grids finds significantly better fit cloudy models than cloudless models. Orbit modeling with relative astrometry...
Abstract We present the pyKLIP-CHARIS post-processing pipeline, a Python library that reduces high contrast imaging data for CHARIS integral field spectrograph used with SCExAO project on Subaru Telescope. The pipeline is part of pyklip package, dedicated to reduction direct exoplanets, brown dwarfs, and discs. For PSF subtraction, relies core algorithms implemented in but uses image registration calibrations are unique CHARIS. describe procedures, calibration results, capabilities...
Abstract We conducted a search for narrowband radio signals over four observing sessions in 2020–2023 with the L -band receiver (1.15–1.73 GHz) of 100 m diameter Green Bank Telescope. pointed telescope directions 62 TESS Objects Interest, capturing emissions from total ∼11,680 stars and planetary systems ∼9′ beam telescope. All detections were either automatically rejected or visually inspected confirmed to be anthropogenic nature. also quantified end-to-end efficiency SETI pipelines signal...
The facility adaptive optics of the Subaru Telescope AO188 recently received some long-awaited upgrades: a new 3224-actuator deformable mirror (DM) from ALPAO (hence name change to AO3000 or AO3k), an upgraded GPU-based real-time computer, visible nonlinear curvature wavefront sensor and near-infrared (NIR WFS), closing loop at up 2kHz. sensors were added in 2023, while DM will be installed beginning 2024. With these features, AO3k provide extreme-AO level correction all instruments on IR...
Visual substitution devices, such as the Brainport tongue stimulator, which converts visual images into patterns of electrotactile stimulation through a 20 x electrode grid array on tongue, provide promise for individuals with impairments. However, very few studies have systematically assessed effectiveness devices in conveying information. In order to evaluate usefulness device, we conducted four experiments that examined ability discriminate stimuli presented 500 ms tongue. Experiment 1...
Observations with the International Ultraviolet Explorer (IUE) during impacts of fragments comet D/Shoemaker‐Levy 9 Jupiter show far‐UV emissions from impact sites within a ∼10 min time scale. Positive detections H 2 Lyman and Werner band (1230–1620 Å) H‐Lyα are made for K S, marginally P2. No thermal continuum is observed. The radiated output was >10 21 ergs. spectrum consistent electron collisional excitation if significant CH 4 absorption included. Such could result plasma processes...
We present a multi-wavelength (1.16$\mu$m-2.37$\mu$m) view of the debris disk around BD+45$^\circ$598, using Subaru Coronagraphic Extreme Adaptive Optics system paired with High Angular Resolution Imaging Spectrograph. With an assumed age 23 Myr, this source allows us to study early evolution disks and search for forming planets. fit scattered light model our differential algorithm, constrain its geometry. find have peak density radius $R_0 = 109.6$ au, inclination $i 88.1^\circ$, position...
Abstract We present a multiwavelength (1.16–2.37 μ m) view of the debris disk around BD+45 ° 598, using Subaru Coronagraphic Extreme Adaptive Optics system paired with High Angular Resolution Imaging Spectrograph. With an assumed age 23 Myr, this source allows us to study early evolution disks and search for forming planets. fit scattered light model our differential algorithm, constrain its geometry. find have peak density radius R 0 = 109.6 au, inclination i 88.1°, position angle PA...
The facility adaptive optics of the Subaru Telescope AO188 recently received some long-awaited upgrades: a new 3224-actuator deformable mirror (DM) from ALPAO (hence name change to AO3000 or AO3k), an upgraded GPU-based real-time computer, visible nonlinear curvature wavefront sensor and near-infrared (NIR WFS), closing loop at up 2~kHz. sensors were added in 2023, while DM will be installed beginning 2024. With these features, AO3k provide extreme-AO level correction all instruments on IR...
The Simultaneous Infrared-Visible Imager/Spectrograph (SIRVIS) is a planned multi-purpose instrument for the Magdalena Ridge Observatory 2.4 m telescope located west of Socorro, NM. primary science drivers are asteroid studies, rapid response to astrophysical transient phenomena and observations artificial targets such as satellites. For science, wavelength range 0.39-2.5 μm gives most mineralogically diagnostic information on surface compositions using standard filters low-resolution, R ~...
We conducted a search for narrowband radio signals over four observing sessions in 2020-2023 with the L-band receiver (1.15-1.73 GHz) of 100 m diameter Green Bank Telescope. pointed telescope directions 62 TESS Objects Interest, capturing emissions from total ~11,680 stars and planetary systems ~9 arcminute beam telescope. All detections were either automatically rejected or visually inspected confirmed to be anthropogenic nature. In this work, we also quantified end-to-end efficiency SETI...