Conveners
Stars and star formation
- Shih-Ping Lai (NTHU)
Stars and star formation
- Chin-Fei Lee (ASIAA)
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Raffaele Rani (NTHU)5/16/26, 11:00 AMOral
Understanding the turbulent structure of molecular clouds is essential for linking galactic environment to the regulation of star formation. While the turbulent properties of Galactic molecular clouds have been extensively investigated, direct observational constraints on turbulence modes in external galaxies remain limited.
In this work, we apply the statistical framework developed by...
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Chia-Yu Hu (Institute of Astrophysics, National Taiwan University)5/16/26, 11:15 AMOral
Chemistry in the interstellar medium (ISM) is the crucial link between theory and observations. While hydrodynamical simulations are the standard for forward modeling, they often lack the resolution to capture essential small-scale processes. In this talk, I will demonstrate that even in cutting-edge, high-resolution simulations (on parsec scales), sub-grid clumping remains a critical missing...
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Yu-Hao Yao5/16/26, 11:30 AMOral
The evolution of globular clusters is an important topic in astronomy.
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Observational results suggested that the external tidal field will
affect the evolution of globular clusters significantly. Therefore, we
use the method of N-body simulations to investigate how various physical
parameters of a globular cluster—such as total mass, half-mass radius,
concentration parameter, and... -
MIHIRKUMAR SANJEEVKUMAR TRIPATHI (National Tsing Hua University)5/16/26, 11:45 AMOral
Planets form within protoplanetary disks; therefore, understanding the diversity of planetary compositions requires studying how material is distributed and evolves within these disks. During their first million years, young disks remain embedded in the envelopes of natal molecular clouds and continue to accrete material. This accreting material alters the disk’s physical and thermal structure...
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Shiang-Chih Wang (National Tsing Hua University/ ASIAA)5/16/26, 12:00 PMOral
The streaming instability (SI) is a key mechanism for forming kilometer-sized planetesimals from dust or pebbles in the core accretion scenario of planet formation. In disks with a radial pressure gradient, the SI can locally enhance the dust-to-gas ratio, leading to gravitational collapse and helping to overcome both collisional and radial drift barriers. Recent studies have identified a new...
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Pin-Hsien Lai (Graduate Institute of Astronomy, National Central University)5/16/26, 1:45 PMOral
We compared empirical RR Lyrae period-luminosity-metallicity (PLZ) and period-Wesenheit-metallicity (PWZ) relations that were calibrated using various RR Lyrae origins to evaluate the accuracy and validity of distance estimations. Our analysis employs RR Lyrae samples from various host systems, including the Large Magellanic Cloud, Draco dwarf galaxy, and globular cluster $\omega$ Centauri. We...
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Shih-Ying Hsu (ASIAA)5/16/26, 2:00 PMOral
Proto-binary and proto-multiple systems with close separations are particularly valuable targets for investigating chemical inheritance and reaction, as their members are expected to form from similar material in their parental cloud. Complex organic molecules (COMs) in young stellar objects (YSOs) have attracted significant attention due to their potential connection to pre-biotic chemistry...
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Jun Hashimoto5/16/26, 2:15 PMOral
Substructures are ubiquitous --- nearly 60\% of protostellar disks, which is less than 1 Myr, host features such as rings/gaps, spirals, and crescents. These features are widely interpreted as evidence for embedded giant planets, suggesting that planet formation occurs much earlier than previously thought. However, previous observations have been biased toward bright, large disks, even though...
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Wei-Shan Su5/16/26, 2:30 PMOral
Stellar flybys are a common dynamical process in young stellar clusters and can significantly reshape protoplanetary discs. However, their impact on dust dynamics remains poorly understood, particularly in the weakly coupled regime ($\mathrm{St}≫1$). We present three-dimensional hydrodynamical simulations of parabolic stellar flybys—both coplanar and inclined—interacting with a gaseous and...
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Jo-Shui Kao (NTHU/ASIAA)5/16/26, 2:45 PMOral
Magnetic fields play a crucial role in the process of star formation and the evolution of collapsing dense cores. However, direct measurements of magnetic field strength from observations remain challenging. The polarization–intensity gradient method is a new approach to estimate the magnetic field strength using polarization angle and intensity gradient, which can provide the map of...
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Rin Yamada (National Astronomical Observatory of Japan)5/16/26, 3:00 PMOral
Filamentary molecular clouds are now recognized as the fundamental structures that set the initial conditions of star formation. However, their formation mechanism remains an open question. Among the proposed scenarios, converging gas flows induced by colliding gas layers have emerged as a compelling candidate (Inoue et al. 2018; Arzoumanian et al. 2018, 2022), yet direct observational...
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Atharva Patil (National Central University)5/16/26, 3:15 PMOral
Accurate u-band photometry in the Galactic plane is challenging because crowding, spatially variable extinction, and filter-system differences can strongly distort the observed stellar locus and complicate direct calibration. In this work, I develop an empirical framework for calibrating and interpreting CFHT u-band observations in heavily reddened fields by linking them to external optical...
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