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

    • COSMOLOGY
      • 1
        Hyeonmo's Report - PyUltraLight2=PyUltraLight + N-body Particles
        Speaker: Hyeonmo Koo (University of Seoul)

        Planar System Generation

        • PyUltraLight (PyUltra = n-body)
          • Fuzzy dark matter
          • Add n-body particle code.
        • Use 'Sponge boundary condition.'
        • We can trust this code.
        • Test: Put 1 particle for each fuzzy dark matter halo in our previous work.
          • For MFDM:Mparticle = 6:4
          • For MFDM:Mparticle = 99:1 → It's easy to separate from the beginning.
        • Final-parsec problem → Black holes merge quickly.
          • Mbh = 106~107 kg
      • 2
        Young's report. FoF and MST algorithm
        Speaker: Young Ju

        FoF and MST algorithm

        • No progress
      • 3
        Hannah's Report
        Speaker: Hannah Jhee (University of Seoul)

        Active Galactic Nucleus (AGN)-Merger Connectivity

        • There are filaments, and the halos spin.
          • What do we get?
          • What is the ultimate goal?
        • Filaments → Distance? ← Observer
        • Robustness evolution
          • Robustness = How high is the density than the surrounding area?
          • z (Redshift) = 0.3: The big changes
          • log R-z (Redshift) graph
        • Persistence diagram
          • Value-persistence graph
            • Pair calculation
            • Difference in density between two pairs
        • Horizon-active galactic nucleus simulation
          • Find gas filaments, not galaxy filaments.
        • Check the safety of filaments.
        • Filaments: Filaments connect nodes and nodes.
        • Topology → The angle?
        • The connectivity of clusters is being studied.
        • Nodes → Average number of filaments → Calculate mathematically (A few calculations) → Comparison ← Observations
      • 4
        Seyeon's Report - CLML
        Speaker: Se Yeon Hwang (Universe of Seoul)

        Cosmology with Large scale structure using Machine Learning (CLML)

        • No progress
      • 5
        Sumi's report
        Speaker: Sumi Kim (University of Seoul)

        Cosmology of High-Order Statistics (CHOA) & Dark Energy Spectroscopic Instrument (DESI)

        • 2pcf comparison of modified gravity parameter
          • r [Mpc/h]-ξ*r*r graph
        • 2pcf comparison of Brans-Dicke parameter
          • WBD = 40000
          • WBD = 39000
          • WBD = 38000
          • WBD = 37000
          • WBD = 36000
        • Use ROCKSTAR → Satellite halos mass function graph
          • log10M-log10dn/dlog10M graph
            • Draw a histogram.
          • One point = One galaxy
          • 8.5 ~ 9.0: There are the largest number of galaxies.
      • 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