UCSD-2019: Cross-Cut: Sky Modeling
From CMB-S4 wiki
- Determine the set of sky models (and all their requirements) that will be used as inputs to pre-CD1 simulations, when those sky models are required.
- What are the necessary analysis tools to answer these questions?
- Overview of Models in PySM: Andrea Zonca (10 mins)
Part I: Extragalactic Models
- SZ, Lensing and CIB: George Stein (10 mins) File:Websky Oct2019.pdf
- Radio Source modeling: Zack Li (10 mins) File:Radio-sources-v1.1.pdf
- Discussion File:Extragalactic discussion.pdf
Part II: Galactic Models
- Summary of models used so far in r forecast work: Ben (5 mins)
- MHD-based Models: Raphael Flauger (5-10 mins)
- Filaments and MHD Sims: Kevin Huffenberger (5-10 mins) File:Huffenberger filament modeling.pdf
- R&D on Frequency Dependence and New Spatial Templates: Brandon Hensley (5-10 mins) File:Hensley sky modeling.pdf
- PySM2 models already implemented with enhanced performance (memory, speedup)
- Models at NSIDE 4096, including Galactic and extragalactic components (lensed CMB consistent with CIB)
WebSky Extragalactic Simulations
- 4000 CPU/hrs per sky realization, much more efficient than corresponding hydro sims, can make more if needed
- tSZ, kSZ, weak lensing, multi-frequency CIB all computed self-consistently
- Good consistency with data
Radio Sources in Extragalactic Models
- Forward simulations with WebSky--paint on radio sources
- XGPaint.jl software now available
- Map productions being developed
- Action item: incorporate existing extragalactic maps into existing map-based sims
- What about star formation, submm galaxies, proto-clusters?
- Need to vary CIB model, but how?
- Leave it squishy, but constrained by observations
- Star-formation at z = 2-3
- Stick with fiducial SZ model? Seems sufficient for current needs
- Action item: Cluster science goal using suite of WebSky sims for frequency optimization (and effect N_eff)