2025 天文年會 (ASROC Annual Meeting)

Session

Poster-Stars

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)

173. A Photometric Approach to Transient Classification: Insights from DESI and Sky Survey Data

Yu-Hsing Lee (National Central University)

Poster

With the rapid development of sky survey projects and observational technology, over 20,000 transient celestial objects have been discovered annually in recent years. However, due to limited telescope time and observational resources, only about 10% of these transients have been classified through spectroscopic analysis, leaving the physical nature of most objects is unknown. Recently, the...

100. Characterizing Temperature Variability and Broadband SED Properties of Flares on the M Dwarf Wolf 359 from Simultaneous Multiband Optical Observations

Chia-Lung Lin (Graduate Institute of Astronomy, National Central University)

Poster

We present a study of flare properties on the highly active M dwarf Wolf 359 using simultaneous multiband ground-based optical observations. High-cadence data were obtained with the instrument TRIPOL on the Lulin 1-m telescope, supplemented by the Lulin 41-cm telescope, over five nights between February 17–22 in 2023. In total, we detected twelve flares. Three flares observed on the first...

18. Comparing the Impact of G Magnitude Selection on Earth's Microlensing Detectability Using Gaia DR3

Thansuda Chulikorn (Chiang Mai university)

Poster

Gravitational microlensing is an essential technique for detecting small exoplanets, including Earth-like planets. Interestingly, from an alternative perspective, the Earth Microlensing Zone (EMZ) can be defined as the region where extraterrestrial civilizations could observe gravitational microlensing events caused by Earth. Updating the EMZ map is crucial for improving microlensing...

89. Diagnosis of substructures around the rare double cluster h and χ Persei

Jia-syuan Wu (National central university)

Poster

We present the discovery and characterization of debris stellar groups around
the Double Cluster h (NGC 869) and chi (NGC 884) Persei to diagnose the formation
and dynamical evolution of binary star clusters. Stars are formed in groups, and
those surviving the emergence out of the molecular clouds become a star cluster.
Open star clusters, primarily located in the Galactic disk, are...

127. Simulating Tidally-Locked Companions in Compact Object Binaries: Assessing the Impact of Irradiation on Dynamical Mass Measurement

Huan-Ping Chao (National Cheng Kung University)

Poster

We have developed a Python tool for simulating the optical observations of tidally-locked companions in compact binary systems based on the Roche potential and the PHOENIX spectral library. The tool generates phase-resolved spectra and light curves observed from a given viewing angle. With the simulations, we aim to investigate the impact of the irradiation effect on the observed radial...

146. THE EVOLUTION OF TYPE IA SUPERNOVAE WITH THEIR EJECTA VELOCITIES

Shubham Gupta

Poster

Type Ia supernovae (SNe Ia) play a central role in cosmology, yet increasing evidence suggests they are not a fully uniform population. While most studies of SN ejecta velocities are from the Si II λ6355 absorption line, the Ca II H&K feature—likely formed in the different layers of SN ejecta—may offer a different perspective on explosion dynamics and progenitor diversity. In this study, we...

31. Validating the Reliability of Distance Estimation Using RR Lyrae gri-Band Period-Luminosity-Metallicity Relations

Pin-Hsien Lai (Graduate Institute of Astronomy, National Central Universe)

Poster

We compared several empirical period-luminosity-metallicity (PLZ) and period-Wesenheit-metallicity (PWZ) relations of RR Lyrae stars to evaluate their validity and precision in distance estimation. Our analysis used data from various observations and surveys of the Large Magellanic Cloud as benchmarks. We further investigated intrinsic factors contributing to discrepancies among the empirical...