PIRSA:25070007 Conference Cosmology

DOI10.48660/25070007

Conference/School: Cosmic Ecosystems

Siegel, J. (2025). A multi-observation view of feedback: joint kinetic Sunyaev-Zeldovich, X-ray, and weak lensing measurements. Perimeter Institute. https://pirsa.org/25070007

Siegel, Jared. A multi-observation view of feedback: joint kinetic Sunyaev-Zeldovich, X-ray, and weak lensing measurements. Perimeter Institute, Jul. 28, 2025, https://pirsa.org/25070007 

@misc{ pirsa_PIRSA:25070007,
  doi = {10.48660/25070007},
  url = {https://pirsa.org/25070007},
  author = {Siegel, Jared},
  keywords = {Cosmology},
  language = {en},
  title = {A multi-observation view of feedback: joint kinetic Sunyaev-Zeldovich, X-ray, and weak lensing measurements},
  publisher = {Perimeter Institute},
  year = {2025},
  month = {jul},
  note = {PIRSA:25070007 see, \url{https://pirsa.org}}
}

Abstract

There is no consensus on how baryonic feedback shapes the underlying matter distribution. This uncertainty is a limiting systematic for cosmic shear inference, particularly in the era of LSST, and a fundamental question in the study of galaxy evolution. Modern simulations are tuned to reproduce a variety of galaxy observations, however, previous studies demonstrated that the implied amplitude of baryon feedback is dependent on the chosen observable: e.g., X-ray gas fractions, which are sensitive to material within the virial radius of massive clusters, or kinematic Sunyaev Zeldovich (kSZ) profiles, which extend to a few virial radii [Bigwood+2024, McCarthy+2024]. In this talk, we address the uncertain observational landscape, by adopting a multi-observation view of feedback. We will present measurements for the gas and mass distribution as seen by eROSITA X-rays, DESI+ACT kSZ, and galaxy-galaxy lensing across a wide range of redshifts (0

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