Inferring Baryonic Feedback Impacts via Kinetic Sunyaev-Zeldovich Cross-Correlations, New Study Reveals

A novel study published on arXiv on November 26, 2025 (arXiv:2511.20595) proposes a new method to infer the impacts of baryonic feedback, a crucial process in galaxy formation, on the large-scale structure of the universe by analyzing cross-correlations in the kinetic Sunyaev-Zeldovich (kSZ) effect.

The research team, led by Alex Laguë, aims to uncover how energy released from galaxies influences surrounding gas and subsequently affects the observable universe’s expansion and galaxy distribution. By combining observations of the kSZ effect with cosmological simulations, this approach has the potential to detect traces of baryonic feedback that have been difficult to capture with traditional observational techniques.

This research is expected to be a significant step forward in understanding the mechanisms behind cosmic evolution, particularly the growth of galaxies and the formation of large-scale structures. Precise analysis of the kSZ effect, which manifests as temperature fluctuations in the Cosmic Microwave Background (CMB), could also lead to the validation of cosmological models.

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