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  A space mission to map the entire observable universe using the CMB as a backlight - Voyage 2050 science white paper

Basu, K., Remazeilles, M., Melin, J.-B., Alonso, D., Bartlett, J. G., Battaglia, N., et al. (2021). A space mission to map the entire observable universe using the CMB as a backlight - Voyage 2050 science white paper. Experimental Astronomy, (2021). doi:10.1007/s10686-021-09748-2.

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Basu, Kaustuv, Author
Remazeilles, Mathieu, Author
Melin, Jean-Baptiste, Author
Alonso, David, Author
Bartlett, James G., Author
Battaglia, Nicholas, Author
Chluba, Jens1, Author           
Churazov, Eugene, Author
Delabrouille, Jacques, Author
Erler, Jens, Author
Ferraro, Simone, Author
Hernández-Monteagudo, Carlos, Author
Hill, J. Colin, Author
Hotinli, Selim C., Author
Khabibullin, Ildar1, Author           
Madhavacheril, Mathew, Author
Mroczkowski, Tony, Author
Nagai, Daisuke, Author
Raghunathan, Srinivasan, Author
Martin, Jose Alberto Rubino, Author
Sayers, Jack, AuthorScott, Douglas, AuthorSugiyama, Naonori, AuthorSunyaev, Rashid1, Author           Zubeldia, Íñigo, Author more..
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1High Energy Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159881              

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 Abstract: This Science White Paper, prepared in response to the ESA Voyage 2050 call for long-term mission planning, aims to describe the various science possibilities that can be realized with an L-class space observatory that is dedicated to the study of the interactions of cosmic microwave background (CMB) photons with the cosmic web. Our aim is specifically to use the CMB as a backlight – and survey the gas, total mass, and stellar content of the entire observable Universe by means of analyzing the spatial and spectral distortions imprinted on it. These distortions result from two major processes that impact on CMB photons: scattering by free electrons and atoms (Sunyaev-Zeldovich effect in diverse forms, Rayleigh scattering, resonant scattering) and deflection by gravitational potential (lensing effect). Even though the list of topics collected in this White Paper is not exhaustive, it helps to illustrate the exceptional diversity of major scientific questions that can be addressed by a space mission that will reach an angular resolution of 1.5 arcmin (goal 1 arcmin), have an average sensitivity better than 1 μK-arcmin, and span the microwave frequency range from roughly 50 GHz to 1 THz. The current paper also highlights the synergy of our Backlight mission concept with several upcoming and proposed ground-based CMB experiments.

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Language(s): eng - English
 Dates: 2021-04-26
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1007/s10686-021-09748-2
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Title: Experimental Astronomy
  Abbreviation : Exp. Astron.
Source Genre: Journal
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Pages: - Volume / Issue: (2021) Sequence Number: - Start / End Page: - Identifier: ISSN: 0922-6435
ISSN: 1572-9508