Published December 2020 | Version Published + Accepted Version
Journal Article Open

Planck intermediate results. LVI. Detection of the CMB dipole through modulation of the thermal Sunyaev-Zeldovich effect: Eppur si muove II

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Abstract

The largest temperature anisotropy in the cosmic microwave background (CMB) is the dipole, which has been measured with increasing accuracy for more than three decades, particularly with the Planck satellite. The simplest interpretation of the dipole is that it is due to our motion with respect to the rest frame of the CMB. Since current CMB experiments infer temperature anisotropies from angular intensity variations, the dipole modulates the temperature anisotropies with the same frequency dependence as the thermal Sunyaev-Zeldovich (tSZ) effect. We present the first, and significant, detection of this signal in the tSZ maps and find that it is consistent with direct measurements of the CMB dipole, as expected. The signal contributes power in the tSZ maps, which is modulated in a quadrupolar pattern, and we estimate its contribution to the tSZ bispectrum, noting that it contributes negligible noise to the bispectrum at relevant scales.

Additional Information

© ESO 2020. Received 30 March 2020 / Accepted 28 August 2020. Planck (http://www.esa.int/Planck) is a project of the European Space Agency (ESA) with instruments provided by two scientific consortia funded by ESA member states and led by Principal Investigators from France and Italy, telescope reflectors provided through a collaboration between ESA and a scientific consortium led and funded by Denmark, and additional contributions from NASA (USA). The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MINECO, JA, and RES (Spain); Tekes, AoF, and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and ERC and PRACE (EU). A description of the Planck Collaboration and a list of its members, indicating which technical or scientific activities they have been involved in, can be found at http://www.cosmos.esa.int/web/planck/planck-collaboration. Some of the results in this paper have been derived using the HEALPix package and the NaMaster package and some plots were generated using the pygtc package.

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Published - aa38053-20.pdf

Accepted Version - 2003.12646.pdf

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Eprint ID
107194
Resolver ID
CaltechAUTHORS:20201218-095602181

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Funding

European Space Agency (ESA)
Centre National d'Études Spatiales (CNES)
Centre National de la Recherche Scientifique (CNRS)
Institut national des sciences de l'Univers (INSU)
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
Institut National du Patrimoine (INP)
Agenzia Spaziale Italiana (ASI)
Consiglio Nazionale delle Ricerche (CNR)
Istituto Nazionale di Astrofisica (INAF)
NASA
Department of Energy (DOE)
Science and Technology Facilities Council (STFC)
United Kingdom Space Agency (UKSA)
Consejo Superior de Investigaciones Científicas (CSIC)
Ministerio de Economía, Industria y Competitividad (MINECO)
Junta de Andalucía
Red Española de Supercomputación (RES)
Tekes (Finland)
Academy of Finland
Finnish IT Center for Science (CSC)
Deutsches Zentrum für Luft- und Raumfahrt (DLR)
Max-Planck-Gesellschaft
Canadian Space Agency (CSA)
DTU Space (Denmark)
Swiss Space Office (SSO)
State Secretariat for Education and Research (Switzerland)
Research Council of Norway
Science Foundation, Ireland
Fundação para a Ciência e a Tecnologia (FCT)
Ministério da Ciência, Tecnologia e Ensino Superior (MCTES)
European Research Council (ERC)
Partnership for Advanced Computing in Europe (PRACE)

Dates

Created
2020-12-18
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Updated
2023-03-15
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