A5076958041- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Geology and Paleoclimatology Research
- Astronomy and Astrophysical Research
- Mathematics and Applications
- Space Exploration and Technology
- Geomagnetism and Paleomagnetism Studies
- Ionosphere and magnetosphere dynamics
- Ga2O3 and related materials
- Astronomical Observations and Instrumentation
- IoT Networks and Protocols
- Solar and Space Plasma Dynamics
- Geological and Geochemical Analysis
- GaN-based semiconductor devices and materials
- History and Developments in Astronomy
- Isotope Analysis in Ecology
- Wireless Networks and Protocols
- History and Theory of Mathematics
- Advanced Mathematical Theories and Applications
- Bluetooth and Wireless Communication Technologies
- Atmospheric Ozone and Climate
- Advanced Differential Equations and Dynamical Systems
- Gamma-ray bursts and supernovae
Institute of Astronomy and Astrophysics, Academia Sinica
2016-2024
National Central University
2013-2022
National Yang Ming Chiao Tung University
2003-2015
Quaoar is a classical Trans-Neptunian Object (TNO) with an area equivalent diameter of 1,100 km and orbital semi-major axis 43.3 astronomical units. Based on stellar occultations observed between 2018 2021, inhomogeneous ring (Q1R, Quaoar's first ring) was detected around this body. Aims. A new occultation by August 9th, 2022 aiming to improve shape models the physical parameters Q1R while searching for additional material Methods. The provided nine effective chords across Quaoar, pinning...
Abstract We present a transit-timing variation (TTV) and planetary atmosphere analysis of the Neptune-mass planet HAT-P-26 b. new set 13 transit light curves from optical ground-based observations combine them with Wide Field Camera 3 on Hubble Space Telescope, Transiting Exoplanet Survey Satellite, previously published data. refine parameters b undertake TTV using 33 transits obtained over seven years. The shows an amplitude signal 1.98 ± 0.05 minutes, which could result presence additional...
Membership identification is the first step to determine properties of a star cluster. Low-mass members in particular could be used trace dynamical history, such as mass segregation, stellar evaporation, or tidal stripping, cluster its Galactic environment. We identified member candidates with masses $\sim$0.11--2.4 Msun intermediate-age Praesepe (M44), by using Pan-STARRS and 2MASS photometry, PPMXL proper motions. Within sky area 3 deg radius, 1040 are identified, which 96 new inclusions....
The Transneptunian Automated Occultation Survey (TAOS II) will aim to detect occultations of stars by small (~1 km diameter) objects in the Kuiper Belt and beyond. Such events are very rare (< 10<sup>−3</sup> per star year) short duration (~200 ms), so many must be monitored at a high readout cadence. TAOS II operate three 1.3 meter telescopes Observatorio Astronómico Nacional San Pedro Mártir Baja California, México. With 2.3 square degree field view speed camera comprising CMOS imagers,...
Abstract The Transneptunian Automated Occultation Survey (TAOS II) is a blind occultation survey with the aim of measuring size distribution Trans-Neptunian Objects diameters in range 0.3 ≲ D 30 km. TAOS II will observe as many 10,000 stars at cadence 20 Hz all three telescopes simultaneously. This produce up to ∼20 billion photometric measurements per night, and ∼6 trillion year, corresponding over 70 million individual light curves. A very fast analysis pipeline for event detection...
Abstract An effective surface cleaning technique is demonstrated for the GaN metal–insulator–semiconductor high-electron-mobility transistor (MIS-HEMT) passivation process. In this study, dilute HF solution and in situ N 2 plasma treatments were adopted to remove native oxide recover nitrogen-vacancy defects at before device passivation. To investigate correlation between properties of SiN/GaN interface performance, MIS-HEMTs characterized using current–voltage ( I – V ) measurement,...
We present a new occultation event simulator for the Trans-Neptunian Automated Occultation Survey (TAOS II). have developed method to compute shadows by small objects with non-circular apparent shapes (as may result from an intrinsic morphology or projection of contact binary). The calculates diffraction features in shadows, as well resulting light curves would be measured TAOS II survey system. include effects such spectral type and finite angular size occulted star. find that events,...
ABSTRACT We present photometric light curves of the stellar occultation event star UCAC4 341-187633 on 2018 August 15 by minor planet (134340) Pluto. Photometric observations were carried out using 2.1-m telescope at San Pedro Mártir Observatory and 1.3-m telescopes Sites 2 3 Trans-Neptunian Automated Occultation Survey (TAOS II) project, a portable 0.4-m from Bahía Asunción, Baja California Sur, Mexico. Different filters used with TAOS II telescopes, whilst system performed no filter. The...
A prototype workstation, called communication protocol analyzer and simulator system (CPASS), aimed at the modeling, verification, analysis, simulation for real-time networks by means of a formal automated approach is presented. The based on an extended finite state machine model, SDL/sup N/ (a variant SDL). It composed six components: network topology editor, N/GR verifier analyzer, N/-to-C compiler, simulator, statistical generator comparator. functionality each component CPASS described....
In this work, we present the general procedure for robotic observations of Transneptunian Automated Occultation Survey (TAOS II). The project aims to detect small TNOs (Transneptunian Objects) by serendipitous stellar occultations. To do so TAOS II will operate three 1.3 m telescopes equipped with CMOS cameras which are able read about 10,000 stars in multiple subapertures at a 20 Hz cadence. At such rates, it be possible identify diffraction features lightcurves, helping us estimate...
GM Cephei (GM Cep) is an active T Tauri star in the young (∼ 4 Myr) open cluster Trumpler 37, showing abrupt UX Orionis type of photometric variability. Chen et al. (2012) reported frequent, sporadic brightening events, each < 0.5 mag and lasting for days, which must have been originated from circumstellar accretion. In addition, also showed a brightness drop ∼ 1 continuously about month, during time became bluer when fainter. Moreover, drops seem to recurrence timescale year. It proposed...
Abstract TAOS II is a next-generation occultation survey with the goal of measuring size distribution small end Kuiper Belt (objects diameters 0.5–30 km). Such objects have magnitudes r > 30, and are thus undetectable by direct imaging. The project will operate three telescopes at San Pedro Mártir Observatory in Baja California, México. Each telescope be equipped custom-built camera comprised focal-plane array CMOS imagers. cameras capable reading out image data from 10,000 stars cadence...
Abstract We present a new pipeline based on the Support Vector Machine algorithm to confirm detection and perform classification of small solar system objects by serendipitous stellar occultations. This is designed analyze light curves identify occultation events occulting bodies according their size, typically from fraction few kilometers, distance Sun, tens astronomical units. The input for this were obtained event simulator Trans-Neptunian Automated Occultation Survey (TAOS II). explore...