Speaker
Description
We present the latest development of "Baryon Pasting", a novel framework that adopts a physics-based approach for forward-modeling SZ and X-ray observations of galaxy clusters and groups. Baryon Pasting enables efficient exploration of the vast astrophysical and cosmological parameter space required for current and upcoming millimeter-wave surveys, such as the Simons Observatory and CMB-S4, while maintaining the physical accuracy of modern hydrodynamical simulations. This makes Baryon Pasting particularly powerful for disentangling the impact of cluster and group astrophysics from cosmology. Using the half-sky Baryon Pasted Uchuu lightcone simulation, we demonstrate significant map-level systematic effects that were previously difficult to quantify. Application of the Baryon Pasting model to the eRASS1 X-ray power spectrum has also yielded precise cosmological and astrophysical constraints, shedding new light on the ongoing $S_8$ tension. Looking forward, we discuss how integrating Baryon Pasting with state-of-the-art cosmological simulations and cutting-edge machine learning techniques will fully unlock the potential of next-generation multiwavelength Stage IV surveys through efficient and interpretable modeling of the observable universe.
| Would you be interested in presenting a poster if the conference is oversubcribed? | Yes |
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