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  Taking measurements of the kinematic Sunyaev-Zel'dovich effect forward: including uncertainties from velocity reconstruction with forward modeling

Nguyen, N. M., Jasche, J., Lavaux, G., & Schmidt, F. (2020). Taking measurements of the kinematic Sunyaev-Zel'dovich effect forward: including uncertainties from velocity reconstruction with forward modeling. Journal of Cosmology and Astroparticle Physics, 2020(12): 011. doi:10.1088/1475-7516/2020/12/011.

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Taking measurements of the kinematic Sunyaev-Zeldovich effect forward including uncertainties from velocity reconstruction with forward modeling.pdf (Any fulltext), 6MB
 
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Nguyen, Nhat Minh1, Author              
Jasche, Jens, Author
Lavaux, Guilhem, Author
Schmidt, Fabian1, Author              
Affiliations:
1Physical Cosmology, MPI for Astrophysics, Max Planck Society, ou_2205644              

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 Abstract: We measure the kinematic Sunyaev-Zel'dovich (kSZ) effect, imprinted by maxBCG clusters, on the Planck SMICA map of the Cosmic Microwave Background (CMB). Our measurement, for the first time, directly accounts for uncertainties in the velocity reconstruction step through the process of Bayesian forward modeling. We show that this often neglected uncertainty budget typically increases the final uncertainty on the measured kSZ signal amplitude by ≃15% at cluster scale. We observe evidence for the kSZ effect, at a significance of ≃2σ. Our analysis, when applied to future higher-resolution CMB data, together with minor improvements in map-filtering and signal-modeling methods, should yield both significant and unbiased measurements of the kSZ signal, which can then be used to probe and constrain baryonic content of galaxy clusters and galaxy groups.

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Language(s): eng - English
 Dates: 2020-12-04
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1088/1475-7516/2020/12/011
Other: LOCALID: 3283590
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Title: Journal of Cosmology and Astroparticle Physics
  Abbreviation : J. Cosmol. Astropart. Phys.
  Abbreviation : JCAP
Source Genre: Journal
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Pages: - Volume / Issue: 2020 (12) Sequence Number: 011 Start / End Page: - Identifier: ISSN: 1475-7516