Planck intermediate results
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Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2018-09-01
Department
Université Paris-Sud
Leiden University
University of Cambridge
IRAP
International School for Advanced Studies
University of the Western Cape
Centre National de la Recherche Scientifique (CNRS)
Universidad de Cantabria
University of Padova
Indian Institute of Science Education and Research Thiruvananthapuram
University of Manchester
Institut d 'Astrophysique de Paris
University of Milano
University of Toronto
Lawrence Berkeley National Laboratory
University of Ferrara
Cardiff University
University of Sussex
University of KwaZulu-Natal
Institut national de physique nucléaire et de physique des particules
University of British Columbia
California Institute of Technology
CNR-ENEA-EURATOM Association
Sapienza University of Rome
INAF - Osservatorio Astronomico di Padova
Université Sorbonne Paris Cité
Imperial College London
European Space Agency - ESA
Max-Planck-Institut für Astrophysik
University of Oslo
Université PSL
African Institute for Mathematical Sciences
Osservatorio Astronomico di Trieste
Princeton University
Jodrell Bank Centre for Astrophysics
Department of Applied Physics
Leiden University
University of Cambridge
IRAP
International School for Advanced Studies
University of the Western Cape
Centre National de la Recherche Scientifique (CNRS)
Universidad de Cantabria
University of Padova
Indian Institute of Science Education and Research Thiruvananthapuram
University of Manchester
Institut d 'Astrophysique de Paris
University of Milano
University of Toronto
Lawrence Berkeley National Laboratory
University of Ferrara
Cardiff University
University of Sussex
University of KwaZulu-Natal
Institut national de physique nucléaire et de physique des particules
University of British Columbia
California Institute of Technology
CNR-ENEA-EURATOM Association
Sapienza University of Rome
INAF - Osservatorio Astronomico di Padova
Université Sorbonne Paris Cité
Imperial College London
European Space Agency - ESA
Max-Planck-Institut für Astrophysik
University of Oslo
Université PSL
African Institute for Mathematical Sciences
Osservatorio Astronomico di Trieste
Princeton University
Jodrell Bank Centre for Astrophysics
Department of Applied Physics
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-17
Series
Astronomy and Astrophysics, Volume 617
Abstract
Using the Planck full-mission data, we present a detection of the temperature (and therefore velocity) dispersion due to the kinetic Sunyaev-Zeldovich (kSZ) effect from clusters of galaxies. To suppress the primary CMB and instrumental noise we derive a matched filter and then convolve it with the Planck foreground-cleaned "2D-ILC" maps. By using the Meta Catalogue of X-ray detected Clusters of galaxies (MCXC), we determine the normalized rms dispersion of the temperature fluctuations at the positions of clusters, finding that this shows excess variance compared with the noise expectation. We then build an unbiased statistical estimator of the signal, determining that the normalized mean temperature dispersion of 1526 clusters is ((ΔT/T)2) = (1.64 ± 0.48) × 10-11. However, comparison with analytic calculations and simulations suggest that around 0.7 σ of this result is due to cluster lensing rather than the kSZ effect. By correcting this, the temperature dispersion is measured to be ((ΔT/T)2) = (1.35 ± 0.48) × 10-11, which gives a detection at the 2.8 σ level. We further convert uniform-weight temperature dispersion into a measurement of the line-of-sight velocity dispersion, by using estimates of the optical depth of each cluster (which introduces additional uncertainty into the estimate). We find that the velocity dispersion is (υ2) = (123 000 ± 71 000) (km s-1)2, which is consistent with findings from other large-scale structure studies, and provides direct evidence of statistical homogeneity on scales of 600 h-1 Mpc. Our study shows the promise of using cross-correlations of the kSZ effect with large-scale structure in order to constrain the growth of structure.Description
Keywords
Cosmic background radiation, Galaxies: clusters: general, Large-scale structure of Universe, Methods: data analysis
Citation
Aghanim , N , Akrami , Y , Ashdown , M , Aumont , J , Baccigalupi , C , Ballardini , M , Banday , A J , Barreiro , R B , Bartolo , N , Basak , S , Battye , R , Benabed , K , Bernard , J P , Bersanelli , M , Bielewicz , P , Bond , J R , Borrill , J , Bouchet , F R , Burigana , C , Calabrese , E , Carron , J , Chiang , H C , Comis , B , Contreras , D , Crill , B P , Curto , A , Cuttaia , F , De Bernardis , P , De Rosa , A , De Zotti , G , Delabrouille , J , Di Valentino , E , Dickinson , C , Diego , J M , Doré , O , Ducout , A , Dupac , X , Elsner , F , Enßlin , T A , Eriksen , H K , Falgarone , E , Fantaye , Y , Finelli , F , Forastieri , F , Frailis , M , Fraisse , A A , Franceschi , E , Kim , J , Ma , Y Z & Savelainen , M 2018 , ' Planck intermediate results : LIII. Detection of velocity dispersion from the kinetic Sunyaev-Zeldovich effect ' , Astronomy and Astrophysics , vol. 617 , A48 , pp. 1-17 . https://doi.org/10.1051/0004-6361/201731489