Conveners
Solar system and exoplanets
- Wei-Ling Tseng
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...
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...
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...
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...
