Conveners
Solar system and exoplanets
- Wei-Ling Tseng
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Tsung-Han Chuang (NTNU)5/17/25, 1:45 PMOral
Streamers have been observed with high-resolution ALMA observations around many protoplanetary disks undergoing formation. They have been suggested to dominate the mass accretion budget from the collapsing prestellar core. Understanding the formation of streamers is there for important for explaining how protoplanetary disks receive mass from the envelope. We propose a model to explain the...
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Mr Terry Long Phan (Institute of Astronomy, National Tsing Hua University, Hsinchu, Taiwan)5/17/25, 2:00 PMOral
The outer solar system is theoretically predicted to harbor an undiscovered planet, often referred to as Planet Nine (P9). Simulations suggest that its gravitational influence could explain the unusual clustering of Kuiper Belt Objects (KBOs). However, there has been no observational evidence for the existence of P9 so far, since its predicted orbit is distantly beyond Neptune’s, where it...
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Kaviya Parthasarathy (National Tsing Hua University)5/17/25, 2:15 PMOral
We present Transit Timing Variations (TTVs) of HAT-P-12b, a low-density sub-Saturn mass planet orbiting a metal-poor K4 dwarf star. Using 14 years of observational data, we analyzed 46 lightcurves with various models, including linear, orbital decay, apsidal precession, and sinusoidal models, to investigate the presence of additional planets. Frequency analysis using the Generalized...
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Chen-Yen Hsu (IANCU)5/17/25, 2:30 PMEither
Both Mercury and the Moon possess tenuous, collisionless "atmospheres", known as "exospheres". Mercury’s proximity to the Sun, coupled with the absence of a dense atmosphere, exposes its surface to intense solar wind, solar radiation, energetic particles, and interplanetary meteoroid impacts. These interactions contribute to the formation and variability of its surface-bound exosphere. The...
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Hsin-Min Liu (NTHU)5/17/25, 2:45 PMOral
Long-term transit follow-up observations sometimes show Transit Timing
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Variations (TTVs), which can provide clues to understanding the
evolution of the planetary system. We study an exoplanet WASP-18Ab which
has a mass about 10.43 Jupiter Mass and an orbital period 0.94 day only.
It is expected to experience the tidal interaction with its central
star, and shrink down its orbit. We fit... -
Yu-Chi Cheng (IANCU)5/17/25, 3:00 PMOral
Since the discovery of the first Centaur object in 1977, objects populated in the planet-crossing orbits between Jupiter and Neptune are believed to be the crucial segments of material transportation and evolution sequence in our solar system. The dynamical study reveals a clear, evidential evolution pathway from the orbital space beyond Neptune to the orbit within Jupiter, which is commonly...
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Chen Yu Tai (IANCU)5/17/25, 3:15 PMOral
We present a multi-site, multi-wavelength, and multi-messenger observing campaign of GJ 3147, a nearby (10 pc) red dwarf known for its frequent flaring activity. From November 11 to 17, 2021, the star was observed with photometry (Weihai, Xinglong, Lijiang, Nanshan, and Maidanak) and photopolarimetry (Lulin and ARIES). In about 100 data hours, three major flares and numerous minor ones were...
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