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Joined 2026-09-21 Message
Incoming links: A. D. Challinor
A. D. Challinor Created 2026-10-20 Updated 2026-11-05
A. D. Challinor coauthored, with A. N. Lasenby, analytic corrections to the thermal Sunyaev-Zeldovich effect in hot galaxy clusters. The calculation uses an expansion of the Kompaneets equation to include relativistic effects in scattering by electrons.
The resulting change in spectral shape matters when combining X-ray and cosmic microwave background observations to infer cluster properties or a Hubble constant. A small correction to the physical signal can produce a systematic shift in a derived parameter.[ref]
Relativistic corrections to the Sunyaev-Zel'dovich effect by A. D. Challinor and A. N. Lasenby. Abstract: analytic spectral corrections and their effect on a combined X-ray/Sunyaev–Zeldovich inference
A. N. Lasenby Created 2026-10-20 Updated 2026-11-05
A. N. Lasenby coauthored a theoretical calculation of relativistic corrections to the thermal Sunyaev-Zeldovich effect with A. D. Challinor. The effect arises when hot electrons change the cosmic microwave background spectrum through scattering.
Their calculation extends the Kompaneets equation and expands the spectral distortion in the dimensionless electron temperature . It connects the accuracy of a cluster measurement to the validity of the nonrelativistic approximation used to interpret it.[ref]
Relativistic corrections to the Sunyaev-Zel'dovich effect by A. D. Challinor and A. N. Lasenby. Abstract: extended Kompaneets equation and first- and second-order temperature corrections