| Date/Room |
April 10, 14:00 @ES606 |
| Speaker |
Shu-ichiro Inutsuka (Nagoya U.)
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| Title |
Star Formation and Evolution of Milky Way Galaxy |
Abstract |
I will briefly summarize the recent progress in our understanding of ISM dynamics and Star Formation and try to envision the future development of the research in our group. The latter includes the evolution of disk galaxies, halo-disk connection, star cluster formation with many binaries, and planet formation. But the choice of actual subjects explained in the talk may depend on the number of questions and available time of three hours!
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| Date/Room |
April 17, 14:00 @ES606 & zoom |
| Speaker |
Hiroshi Kobayashi (Nagoya U.)
|
| Title |
Theory of Planet Formation |
Abstract |
The origin of gas giant planets, such as Jupiter and Saturn, is discussed along the core-accretion scenario, in which gas giants are formed via rapid gas accretion onto massive solid cores. However, the formation of massive cores includes a lot of difficulties. I review the difficulty of core formation via planetesimal or pebble accretion. I show the possible scenario for core formation based on dust-to-planet simulations.
The collisional outcome is important for planet formation. I drive a nice outcome model based on collisional simulations, which may allow us to understand collisional outcomes in various scales from dust to planets.
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| Date/Room |
April 24, 14:00 @ES606 |
| Speaker |
Kanta Kitajima (Nagoya U.)
|
| Title |
Particle-Based Analysis of Relativistic Jets |
Abstract |
In this presentation, we will analyze a simulation of a stationary high-temperature gas accelerating to a relativistic velocity. The Special Relativistic Godunov Smoothed Particle Hydrodynamics (SRGSPH) [Kitajima+ 2025, submitted] will be employed to model the fluid as a collection of discrete particles, known as SPH particles, and to describe the fluid's motion through the interaction of each SPH particle with its environment. By leveraging the advantages of the SPH method, we can investigate fluids in vacuum regions, which have traditionally been challenging to address with standard numerical methods. This study takes advantage of the unique aspects of the SPH method to simulate a jet from a high-temperature source into a vacuum and analyze its acceleration mechanism. The findings from this analysis provide valuable insights into the driving mechanisms of relativistic jets, including those observed in active galactic nuclei and gamma-ray bursts.
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