Moving lens effect: Simulations, forecasts, and foreground mitigation

Beheshti, Ali; Schaan, Emmanuel; Kosowsky, Arthur

doi:10.1103/physrevd.111.043510

Moving lens effect: Simulations, forecasts, and foreground mitigation

Journal Article · Wed Feb 05 00:00:00 EST 2025 · Physical Review D

DOI:https://doi.org/10.1103/physrevd.111.043510· OSTI ID:2588169

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Univ. of Pittsburgh, PA (United States)
Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

The peculiar motion of massive objects across the line of sight imprints a dipolar temperature anisotropy pattern on the cosmic microwave background known as the moving lens effect. This effect provides a unique probe of the transverse components of the peculiar velocity field, but has not yet been detected due to its small size. We implement and validate a stacking estimator for the moving lens signal using a galaxy catalog as a tracer of massive haloes combined with reconstructed velocities from the galaxy number density field. Using simulations, we forecast detection prospects for the moving lens signal from current and upcoming microwave background and galaxy surveys. Here, we demonstrate a new foreground mitigation strategy likely sufficient for current datasets, and discuss various sources of systematic error and noise. Upcoming galaxy surveys will provide high-significance statistical detections of the moving lens effect.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 2588169

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 4 Vol. 111; ISSN 2470-0010; ISSN 2470-0029

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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