Work

Constraints on cosmology beyond $Λ$CDM with kinetic Sunyaev Zel'dovich velocity reconstruction

Year: 2024

Type: preprint

Abstract: Kinetic Sunyaev Zel'dovich velocity reconstruction uses the statistically anisotropic cross-correlation between cosmic microwave background (CMB) temperature anisotropies and a galaxy survey to reconstruct the remotely observed CMB dipole. Using a reconstruction based on data from $\textit{Planck}$ and unWISE, we rule out non-linear Gpc-scale voids, provide the tightest constraint on the intrinsic dipole ($<14 \ {\rm km/s}$ at $68\%$ confidence), rule out matter-radiation isocurvature as an explanation of discrepancies between the measured CMB and galaxy number count dipoles, and constrain the amplitude of local-type primordial non-Gaussianity ($-220\lesssim f_{\rm NL}\lesssim 136$ at $68\%$ confidence) and compensated isocurvature ($-147\lesssim A_{\rm CIP} \lesssim 281$ at $68\%$ confidence). This representative set of constraints on beyond-$Λ$CDM scenarios demonstrates the breadth of fundamental science possible with measurements of secondary CMB anisotropies such as the kinetic Sunyaev Zel'dovich effect.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2408.05264

Authors: Krywonos, Jordan, Hotinli, Selim C., Johnson, Matthew C.

Institutions: Perimeter Institute, York University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Innovation, Science and Economic Development Canada, Government of Canada, Institut Périmètre de physique théorique, Natural Sciences and Engineering Research Council of Canada

OpenAlex ID: W4402386304

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