CMBR polarisation; gravitational waves and CMBR polarization; Astronomy and Astrophysics
Abstract :
[en] We estimate the efficiency of mitigating the lensing B-mode polarization, the so-called delensing, for the LiteBIRD experiment with multiple external data sets of lensing-mass tracers. The current best bound on the tensor-to-scalar ratio, r, is limited by lensing rather than Galactic foregrounds. Delensing will be a critical step to improve sensitivity to r as measurements of r become more and more limited by lensing. In this paper, we extend the analysis of the recent LiteBIRD forecast paper to include multiple mass tracers, i.e., the CMB lensing maps from LiteBIRD and CMB-S4-like experiment, cosmic infrared background, and galaxy number density from Euclid- and LSST-like survey. We find that multi-tracer delensing will further improve the constraint on r by about 20%. In LiteBIRD, the residual Galactic foregrounds also significantly contribute to uncertainties of the B-modes, and delensing becomes more important if the residual foregrounds are further reduced by an improved component separation method.
Research Center/Unit :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Namikawa, T. ; Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Japan
Lonappan, A.I.; Dipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy ; International School for Advanced Studies (SISSA), Trieste, Italy ; INFN Sezione di Roma2, Università di Roma Tor Vergata, Roma, Italy
Baccigalupi, C.; International School for Advanced Studies (SISSA), Trieste, Italy ; INFN Sezione di Trieste, Trieste, Italy ; IFPU, Grignano, Italy
Bartolo, N.; Dipartimento di Fisica e Astronomia “G. Galilei”, Universita` degli Studi di Padova, Padova, Italy ; INFN Sezione di Padova, Padova, Italy ; INAF, Osservatorio Astronomico di Padova, Padova, Italy
Beck, D.; Stanford University, Department of Physics, United States
Benabed, K.; Institut d'Astrophysique de Paris, CNRS, Sorbonne Université, Paris, France
Challinor, A.; DAMTP, Centre for Mathematical Sciences, Cambridge, United Kingdom ; Institute of Astronomy, Cambridge, United Kingdom ; Kavli Institute for Cosmology Cambridge, Cambridge, United Kingdom
Diego-Palazuelos, P.; Instituto de Fisica de Cantabria (IFCA, CSIC-UC), Santander, Spain ; Dpto. de Física Moderna, Universidad de Cantabria, Santander, Spain
Errard, J.; Université de Paris, CNRS, Astroparticule et Cosmologie, Paris, France
Farrens, S.; AIM, CEA, CNRS, Université Paris-Saclay, Université de Paris, Gif-sur-Yvette, France
Krachmalnicoff, N.; International School for Advanced Studies (SISSA), Trieste, Italy ; INFN Sezione di Trieste, Trieste, Italy ; IFPU, Grignano, Italy
Migliaccio, M.; Dipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy ; INFN Sezione di Roma2, Università di Roma Tor Vergata, Roma, Italy
Martínez-González, E.; Instituto de Fisica de Cantabria (IFCA, CSIC-UC), Santander, Spain
Pettorino, V.; AIM, CEA, CNRS, Université Paris-Saclay, Université de Paris, Gif-sur-Yvette, France
Piccirilli, G.; Dipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy
Ruiz-Granda, M.; Instituto de Fisica de Cantabria (IFCA, CSIC-UC), Santander, Spain ; Dpto. de Física Moderna, Universidad de Cantabria, Santander, Spain
Sherwin, B.; DAMTP, Centre for Mathematical Sciences, Cambridge, United Kingdom ; Kavli Institute for Cosmology Cambridge, Cambridge, United Kingdom ; Lawrence Berkeley National Laboratory (LBNL), Physics Division, Berkeley, United States
Starck, J.; AIM, CEA, CNRS, Université Paris-Saclay, Université de Paris, Gif-sur-Yvette, France
Vielva, P.; Instituto de Fisica de Cantabria (IFCA, CSIC-UC), Santander, Spain
Akizawa, R.; The University of Tokyo, Department of Physics, Tokyo, Japan
Anand, A.; Dipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy
Aumont, J.; IRAP, Université de Toulouse, CNRS, CNES, UPS, Toulouse, France
Aurlien, R.; Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway
Azzoni, S.; Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, United States
Ballardini, M.; INAF — OAS Bologna, Bologna, Italy ; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy ; INFN Sezione di Ferrara, Ferrara, Italy
Banday, A.J.; IRAP, Université de Toulouse, CNRS, CNES, UPS, Toulouse, France
Barreiro, R.B.; Instituto de Fisica de Cantabria (IFCA, CSIC-UC), Santander, Spain
Bersanelli, M.
Blinov, D.
Bortolami, M.; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy ; INFN Sezione di Ferrara, Ferrara, Italy
Brinckmann, T.; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy
Calabrese, E.
Campeti, P.
Carones, A.; Dipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy ; INFN Sezione di Roma2, Università di Roma Tor Vergata, Roma, Italy
Carralot, F.; International School for Advanced Studies (SISSA), Trieste, Italy
Casas, F.J.; Instituto de Fisica de Cantabria (IFCA, CSIC-UC), Santander, Spain
Cheung, K.
Clermont, Lionel ; Université de Liège - ULiège > Centres généraux > CSL (Centre Spatial de Liège)
Columbro, F.
Conenna, G.
Coppolecchia, A.
Cuttaia, F.; INAF — OAS Bologna, Bologna, Italy
D'Alessandro, G.
de Bernardis, P.
de Haan, T.
De Petris, M.
Della Torre, S.
Di Giorgi, E.
Eriksen, H.K.; Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway
Fuskeland, U.; Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway
Galloni, G.; Dipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy
Galloway, M.; Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway
Georges, Marc ; Université de Liège - ULiège > Centres généraux > CSL (Centre Spatial de Liège)
Gerbino, M.; INFN Sezione di Ferrara, Ferrara, Italy
Gervasi, M.
Ghigna, T.
Giardiello, S.
Gimeno-Amo, C.; Instituto de Fisica de Cantabria (IFCA, CSIC-UC), Santander, Spain
Gjerløw, E.; Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway
Hazumi, M.; Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Japan
Henrot-Versillé, S.
Hergt, L.T.
Hivon, E.; Institut d'Astrophysique de Paris, CNRS, Sorbonne Université, Paris, France
Kohri, K.
Komatsu, E.; Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Japan
Lamagna, L.
Lattanzi, M.; INFN Sezione di Ferrara, Ferrara, Italy
Leloup, C.; Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Japan
Lembo, M.; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy
López-Caniego, M.
Luzzi, G.
Maffei, B.
Masi, S.
Massa, M.
Matarrese, S.; Dipartimento di Fisica e Astronomia “G. Galilei”, Universita` degli Studi di Padova, Padova, Italy ; INFN Sezione di Padova, Padova, Italy ; INAF, Osservatorio Astronomico di Padova, Padova, Italy
Matsumura, T.; Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Japan
Micheli, S.
Moggi, A.
Monelli, M.
Montier, L.; IRAP, Université de Toulouse, CNRS, CNES, UPS, Toulouse, France
Morgante, G.; INAF — OAS Bologna, Bologna, Italy
Mot, B.; IRAP, Université de Toulouse, CNRS, CNES, UPS, Toulouse, France
Mousset, L.; IRAP, Université de Toulouse, CNRS, CNES, UPS, Toulouse, France
Nagata, R.
Natoli, P.; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy ; INFN Sezione di Ferrara, Ferrara, Italy
Novelli, A.
Obata, I.; Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Japan
Occhiuzzi, A.
Pagano, L.; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy ; INFN Sezione di Ferrara, Ferrara, Italy
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