CPLUOS Astrophysics team meeting

Monday 25 Oct 2021, 16:30 → 17:55 Asia/Seoul

물리학과

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

COSMOLOGY

1 Dr.Sangnam Park's Report - FDM_Offset

Speaker: Sangnam Park

2 Hyeonmo's report - CDM Halo Evolution for Gadget2 Simulation

Speaker: Hyeonmo Koo (University of Seoul)

• CDM Halo Evolution for Gadget2 Simulation
  • Position-box - velocity graph
    • Set M = 50
    • Peak = X-axis 33 position-box
    • M = 50 ➝ 18 ~ 25
    • M = 30 ➝ (18 ~ 25)(5/3)
    • M = 40 ➝ Initial velocity increases more than when M = 50.

3 Young's report. FoF and MST algorithm

Speaker: Young Ju

• FoF and MST algorithm
  • Number density : Add 5000 noise data, minimum member = 50
    • Radius : 3σ = 30, ρ = N/((4π/3)(σ^3))
    • Cluster id - ρ graph
      • MGS's ρ is bigger than MST's ρ.
      • The mean of ρ is about 0.0018.
  • Number density : Add 5000 noise data
    • True density (from random) VS Recovered density (from MGS)
    • True density - Recovered density graph
      • The mean increases proportionally.
  • Number density 2 : Add 5000 noise data, minimum member = 3
    • The number of galaxies in cluster VS The number of clusters.
    • Number of galaxies - Number of Clusters graph
      • The number of Number of clusters in MGS is about twice as high as the number of Number of clusters in MST.

4 CHOA(Cosmology of High-Order Statistics)

Speaker: Sumi Kim (University of Seoul)

5 Dr.Sabiu's Report

Speaker: Dr Cristiano Sabiu (University of Seoul)

6 Discussion