CPLUOS Astrophysics team meeting

Friday 4 Nov 2022, 14:00 → 15:20 Asia/Seoul

물리학과

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

COSMOLOGY

1 Hyeonmo's Report

Speaker: Hyeonmo Koo (University of Seoul)

The comparizon of FDM and CDM using GALIC and DICE

• The plot of the relative velocity decrease (Δv) as the function of initial relative velocity (v_i).
  • The home-made graph
    • There are many bumpers. Because the graph has oscillations and no radial component and tangential component.
  • The graph using galic
    • There is no bumper.
    • There is no cutup.
• CDM is bigger than FDM
• PDF > PNG
  • PNG is not nature.

2 Young's report. FoF and MST algorithm

Speaker: Young Ju

FoF and MST Algorithm

• In last MGS meeting, remove the topological data.
• Professor InKyu Park suggested that we add 2-D data result.
• There are the problems.
  • We use Voronoi function.
  • Voronoi function could not calculate area...
  • I just add some vertices into Voronoi cell roughly.
  • MGS: 66
  • MST: 23
• In graph, clarify x-axis and y-axis.

3 Hannah's Report

Speaker: Hannah Jhee (University of Seoul)

Halos infalling a cluster through filaments

• Justification of our method
  • We didn't consider the evolution of filaments.
  • Straight-line approximation
• Evolution of filaments
  • Tree of filaments? → Very hard!
  • Different persistence level at different snapshot? (DisPerSE)
  • Should be perpendicular, but how with minimum appoximation?
• W. Peng's paper → Redshift-fraction graph
• Should research merging two filaments.

4 Seyeon's Report - CLML

Speaker: Se Yeon Hwang (Universe of Seoul)

Seyeon Hwang prepares admission at University College London.

5 Sumi's report

Speaker: Sumi Kim (University of Seoul)

Cosmology of High-Order Statistics (CHOA)

• No progress

6 Dr.Sabiu's Report

Speaker: Dr Cristiano Sabiu (University of Seoul)

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

• No progress

7 Discussion