CPLUOS Astrophysics team meeting

Friday 16 Dec 2022, 14:00 → 15:20 Asia/Seoul

물리학과

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

14:00 → 15:00 COSMOLOGY

14:00 Hyeonmo's Report

Speaker: Hyeonmo Koo (University of Seoul)

Head-on Collision Fuzzy/Cold Dark Matter Halos

• Halo generlation graph
  • r [kpc]-4πr²ρM_Sun [kpc] graph
    • r: 0.00 ~ 2.00
    • 4πr²ρM_Sun: 0 ~ 9e8
    • t = 0.0 Myr ~ 784.0 Myr
  • ρ_s(r) = ρ_c/[1+(αr/r_c)²]⁸

14:10 Young's report. FoF and MST algorithm

Speaker: Young Ju

FoF and MST algorithm

• Now, Professor and Doctors are correcting the paper.
• Today, I show one plot about 2D result.
• I have to change more things.
• Linking length: 10

14:20 Hannah's Report

Speaker: Hannah Jhee (University of Seoul)

Halos infalling a cluster through filaments

• Attend KITP Workshop.
• DisPerSE: Persistence level
  • Fraction total particles-Number of filaments graph
• New filaments with the backgrounds
• Filament velocity distribution
  • Mean velocity [km/s] graph
    • New
    • Old (z = 0)
• What's happening when θ > 90 degrees?
  • Snapshot number-θ [degrees] graph
    • Red line: Only halo velocity
    • Blue line: Subtracted filement velocity.
  • In last week, the displacement vector calculation and the velocity subtraction were done in reverse way.
    • x [cMpc/h]-y [cMpc/h] graph
  • As a result, θ > 90 degrees

14:30 Seyeon's Report - CLML

Speaker: Se Yeon Hwang (Universe of Seoul)

Cosmology with Large scale structure using Machine Learning (CLML)

• No progress

14:40 Sumi's report

Speaker: Sumi Kim (University of Seoul)

Cosmology of High-Order Statistics (CHOA)

• Previously in CHOA
• Methodology
  • Gaussian field
  • Fixed field
  • Paired gaussian field
  • Paired fixed field
• Simulation
  • Used different random seed for gaussian.
  • Used random seed for paired fixed field pair.

14:50 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

15:00 → 15:10 Discussion