CPLUOS Astrophysics team meeting

Asia/Seoul
물리학과

물리학과

Zoom Meeting https://uos-ac-kr.zoom.us/j/8264902652 Meeting ID: 826 490 2652
Description

https://uos-ac-kr.zoom.us/j/8264902652

    • 14:00 15:00
      COSMOLOGY
      • 14:00
        Hyeonmo's Report 10m
        Speaker: Hyeonmo Koo (University of Seoul)

        Head-on Collision Fuzzy/Cold Dark Matter Halos

        • No progress
      • 14:10
        Young's report. FoF and MST algorithm 10m
        Speaker: Young Ju

        FoF and MST algorithm

        • We apply the same method to simulation data (Horizon Run 4 (HR4) data).
        • However, all of the simulation results seem to be weird at low linking-length.
      • 14:20
        Hannah's Report 10m
        Speaker: Hannah Jhee (University of Seoul)

        Halos infalling a cluster through filaments

        • Review
          • Perpendicular method
            • Straight line assumption
            • Filament not evolving.
            • Current (z = 0) nearest point is the most dominant source of effect.
        • DisPerSE on all-time filaments stacked.
          • For randomly chosen 2000 segments
          • 9 sigma has less low-density segments.
          • 9 siama has (very slightly) more high-density segments than 6 sigma.
        • Example halo: c00_h50380510
          • Only halo velocity
          • Filament velocity subtracted.
        • c00: 40 massive halos stacked.
          • Only halo velocity
          • Filament velocity subtracted.
        • Next week
          • New filaments on the background filaments (for check)
          • Why theta > 90 degree at earlier epoch (which means it's going away from the filaments)?
          • Filament velocity distribution
      • 14:30
        Seyeon's Report - CLML 10m
        Speaker: Se Yeon Hwang (Universe of Seoul)

        Cosmology with Large scale structure using Machine Learning (CLML)

        • Our admission process is ungoing.
        • We think it will be finished next week.
        • We are testing ViT with new simulation.
        • We also need to reduce time taken to create galaxies catalog.
      • 14:40
        Sumi's report 10m
        Speaker: Sumi Kim (University of Seoul)

        Cosmology of High-Order Statistics (CHOA)

        • Read this paper: Statistical Properties of Paired Fixed Fields
      • 14:50
        Dr.Sabiu's Report 10m
        Speaker: Dr Cristiano Sabiu (University of Seoul)

        Deep Learning the Deep Sky: Recovering low surface brightness objects with machine learning

        • No progress
    • 15:00 15:10
      Discussion 10m