Speaker
Description
Foreground emission from the Galaxy presents a major challenge for microwave experiments aiming to detect cosmic signals. In particular, polarized Galactic emission remains a major obstacle to precise measurements of the cosmic microwave background (CMB) polarization, such as the inflationary B-mode signal. To tackle these issues, the Pan-Experiment Galactic Science Group PySM Collaboration has developed a publicly available suite of all-sky Galactic microwave emission and polarization models at sub-arcminute scales. These new models are built using a polarization fraction tensor framework and incorporate the latest observational data from large-area surveys. By combining well-measured large-scale emission with realizations of small-scale synthetic emission, they generate dust and synchrotron foreground maps that are statistically consistent yet stochastic at small scales, while aligning with observational data at large scales. To support CMB experimental design, forecasting and analysis, we provide three coherent model suites — low, medium, and high complexity — spanning the range of astrophysical complexity permitted by current data. In this talk, I will discuss the construction of these new PySM models, demonstrate their overall improved agreement with observational data compared to previous models, and outline their future prospects.
| Would you be interested in presenting a poster if the conference is oversubcribed? | No |
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