2025 天文年會 (ASROC Annual Meeting)

Session

Poster-Solar

Not scheduled

International Conference Hall 圓形國際會議廳 (College of Management, National Formosa University 國立虎尾科技大學第三校區文理暨管理大樓)

66. An Investigation in the orbital evolution of the Near-Earth Asteroid Eros

Xi-Feng Cha (Institute of Astronomy, National Central University (IANCU))

Poster

Abstract

In the past research of 433 Eros [1] mentioned that there would probably become the Earth-crossing asteroid within many numerical simulation tests. In this research, we deeply investigated the orbital evolution of 433 Eros. In addition to simulate 433 Eros' orbital evolution, we checked when Eros encounters the Earth, and even hits the Earth. Then, since with long-time simulations...

73. Assessing Exomoon Detectability in TESS Light Curves: A Case Study of TOI-2010

Wen Chi Cheng (National TsingHua University)

Poster

Over the past decades, photometric methods have led to the discoveries of thousands of exoplanets. While similar techniques have been used to search for exomoons, none have been confirmed. We aim to survey potential exomoons using Transiting Exoplanet Survey Satellite (TESS) data and present a case study to illustrate our methodology. Based on previously proposed systems with exomoon...

48. Collisional Ejection of Helium Atoms in the Martian Atmosphere

Hua-Shan Shih (National Central University)

Poster

Non-thermal escape via hot oxygen production, primarily from the dissociative recombination of O₂⁺, significantly influences atmospheric loss on Mars. These hot oxygen atoms can collide with other atmospheric species, such as helium and minor gases, affecting their energy distributions and contributing to escape processes. Previous studies have indicated that solar wind helium contributes...

40. Identifying Binary Asteroids Using Machine Learning with Simulated Lightcurves and FOSSIL Survey Data

Cheng-An Hsieh (National Taiwan University)

Poster

Binary asteroids provide crucial information of the solar system evolution. This study presents a machine learning (ML) approach, using Random Forest classifiers, to identify binary asteroids from lightcurves. We aim to study the population of binary asteroids in the main asteroid belt. To achieve this, we develop the asteroids model to simulate the lightcurves as the training set, which...

139. Lightcurve and Color Index of Jupiter Trojans in L5 from ZTF Observations

Po-Chih Chang (National Central University)

Poster

We present an analysis of observations pointing on the trailing L5 cloud using the Zwicky Transient Facility in early Oct and Nov of 2024. The obtained images with the g' and r' filter allowed for the measurement of g − r color. We detected 579 Trojans in the observed fields, and the median value of g'-r' color is $0.633\pm0.094$. Because each target had at least five g-r data sets and...

29. Moon Hunting with TESS: Revealing Exomoons via Transit Timing Variations and Transit Duration Variations

Prangsutip Cherdwongsung (National Tsing Hua University)

Poster

One of the most fascinating and difficult tasks in contemporary astronomy is the finding of exomoons, the moons orbiting exoplanets. In order to find possible exomoons, this study investigates the use of transit timing variations (TTV) and transit duration variations (TDV) as indirect methods. Our goal is to find the dynamical signatures that indicate to the gravitational impact of an orbiting...

47. Numerical Simulation of Gas Expansion from Meteoroid Impact Vaporization on Mercury

Ian-Lin Lai (NCU)

Poster

Meteoroid impacts on Mercury’s surface produce transient vapor plumes by releasing volatile species from surface materials. Observations by NASA’s MESSENGER spacecraft have detected significant transient Na enhancements in Mercury’s nightside exosphere, attributed to large-scale meteoroid impact events (Cassidy et al., 2021). Furthermore, superthermal ( >50,000) Ca atoms also has been...

39. Observation of Lunar Impact Flashes at Lulin observatory

Kuang Jie Zeng

Poster

The Taiwan University Lunar Investigation Project (TULIP) at the National Central University is operating a lunar impact flash monitoring system at the Lulin Observatory in the middle of Taiwan. In the last few years, several lunar impact flashes (LIFs) have been detected by two telescopes, an RC12 (30 cm) and a C8 (20 cm), mounted together on the equatorial center balance mount. The physical...

164. Spectroscopic observation on Helley-type comet 12P/Pons-Brooks

JieLin Yang (National Central University)

Poster

We present our time-series spectroscopic observation of comet 12P/Pons-Brooks using the LISA spectrograph mounted on the Lulin One-meter Telescope. The data were obtained between 25 November, 2023 and 24 March 2024, with heliocentric distances from 2.463 to 0.941 au at the pre-perihelion epoch. We clearly detected the emission features of CN, C₂, C₃, NH₂, and OI, and estimated the production...

133. Temporal Variability of SO and NaCl in Io's Atmosphere Observed through the Submillimeter Array

Mr Rong-Ting Hsu

Poster

Io, Jupiter's most volcanically active moon, has a dynamic atmosphere primarily composed of sulfur dioxide (SO₂). Minor atmospheric components, such as sulfur monoxide (SO), sodium chloride (NaCl), and potassium chloride (KCl), are likely produced by volcanic outgassing. Some SO also originates from the photodissociation of SO₂. These components serve as indicators of atmospheric processes and...

153. Truncated Power Law Embedded in Mass Distribution of Geminids Using Gaussian Statistic

WENCHUN LU

Poster

This study uses the Gaussian distribution function model to find the mass index of the meteor. We use the observations and the meteor melting formula to calculate the meteor mass m, and then analyze the correlation between m and the number of meteors to find the mass index of the meteor shower of the Geminids.
In the past, the mass index was obtained through repeated calculations. Our...