LiteBIRD science goals and forecasts: improved full-sky reconstruction of the gravitational lensing potential through the combination of Planck and LiteBIRD data

M. Ruiz-Granda; P. Diego-Palazuelos; C. Gimeno-Amo; P. Vielva; A.I. Lonappan; T. Namikawa; R.T. Génova-Santos; M. Lembo; R. Nagata; M. Remazeilles; D. Adak; E. Allys; A. Anand; J. Aumont; C. Baccigalupi; M. Ballardini; A.J. Banday; R.B. Barreiro; N. Bartolo; S. Basak; M. Bersanelli; A. Besnard; D. Blinov; M. Bortolami; F. Bouchet; T. Brinckmann; F. Cacciotti; E. Calabrese; P. Campeti; A. Carones; F.J. Casas; K. Cheung; M. Citran; L. Clermont; F. Columbro; A. Coppolecchia; P. de Bernardis; T. de Haan; E. de la Hoz; M. De Lucia; S. Della Torre; E. Di Giorgi; H.K. Eriksen; F. Finelli; C. Franceschet; U. Fuskeland; G. Galloni; M. Galloway; M. Gervasi; T. Ghigna; S. Giardiello; A. Gruppuso; M. Hazumi; L.T. Hergt; E. Hivon; K. Ichiki; H. Jiang; B. Jost; K. Kohri; L. Lamagna; M. Lattanzi; C. Leloup; F. Levrier; M. López-Caniego; G. Luzzi; J. Macias-Perez; V. Maranchery; E. Martínez-González; S. Masi; S. Matarrese; T. Matsumura; S. Micheli; M. Monelli; L. Montier; G. Morgante; M. Najafi; A. Novelli; F. Noviello; I. Obata; A. Occhiuzzi; A. Paiella; D. Paoletti; G. Pascual-Cisneros; F. Piacentini; G. Piccirilli; G. Polenta; L. Porcelli; N. Raffuzzi; A. Rizzieri; J.A. Rubiño-Martín; Y. Sakurai; J. Sanghavi; D. Scott; M. Shiraishi; G. Signorelli; R.M. Sullivan; Y. Takase; L. Terenzi; M. Tomasi; M. Tristram; L. Vacher; B. van Tent; I.K. Wehus; G. Weymann-Despres; Y. Zhou; LiteBIRD Collaboration; Dario Poletti

doi:10.1088/1475-7516/2025/11/073

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LiteBIRD science goals and forecasts: improved full-sky reconstruction of the gravitational lensing potential through the combination of Planck and LiteBIRD data

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LiteBIRD science goals and forecasts: improved full-sky reconstruction of the gravitational lensing potential through the combination of Planck and LiteBIRD data

M. Ruiz-Granda, P. Diego-Palazuelos, C. Gimeno-Amo, P. Vielva, A.I. Lonappan, T. Namikawa, R.T. Génova-Santos, M. Lembo, R. Nagata, M. Remazeilles, …

Journal of cosmology and astroparticle physics, Vol.2025(11), p.73

01/11/2025

DOI: https://doi.org/10.1088/1475-7516/2025/11/073

Abstract

CMBR experiments

cosmological parameters from CMBR

gravitational lensing

inflation

Cosmic microwave background (CMB) photons are deflected by large-scale structure through gravitational lensing. This secondary effect introduces higher-order correlations in CMB anisotropies, which are used to reconstruct lensing deflections. This allows mapping of the integrated matter distribution along the line of sight, probing the growth of structure, and recovering an undistorted view of the last-scattering surface. Gravitational lensing has been measured by previous CMB experiments, with Planck's 42 σ detection being the current best full-sky lensing map. We present an enhanced LiteBIRD lensing map by extending the CMB multipole range and including the minimum-variance estimation, leading to a 49 to 58 σ detection over 80 % of the sky, depending on the final complexity of polarized Galactic emission. The combination of Planck and LiteBIRD will be the best full-sky lensing map in the 2030s, providing a 72 to 78 σ detection over 80 % of the sky, almost doubling Planck's sensitivity. Finally, we explore different applications of the lensing map, including cosmological parameter estimation using a lensing-only likelihood and internal delensing, showing that the combination of both experiments leads to improved constraints. The combination of Planck + LiteBIRD will improve the S 8 constraint by a factor of 2 compared to Planck, and Planck + LiteBIRD internal delensing will improve LiteBIRD's tensor-to-scalar ratio constraint by 6 %. We have tested the robustness of our results against foreground models of different complexity, showing that improvements remain even for the most complex foregrounds.

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Title: LiteBIRD science goals and forecasts: improved full-sky reconstruction of the gravitational lensing potential through the combination of Planck and LiteBIRD data
Creators - without role: M. Ruiz-Granda - Universidad de Cantabria
P. Diego-Palazuelos - Max Planck Institute for Astrophysics
C. Gimeno-Amo - Instituto de Física de Cantabria
P. Vielva - Instituto de Física de Cantabria
A.I. Lonappan - University of California, San Diego, Department of Physics, San Diego, CA 92093-0424, U.S.A
T. Namikawa - Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
R.T. Génova-Santos - Universidad de La Laguna
M. Lembo - Institut d'Astrophysique de Paris
R. Nagata - Japan Aerospace Exploration Agency
M. Remazeilles - Instituto de Física de Cantabria
D. Adak - Instituto de Astrofísica de Canarias
E. Allys - École Normale Supérieure - PSL
A. Anand - Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 1, 00133, Roma, Italy
J. Aumont - Institut de Recherche en Astrophysique et Planétologie
C. Baccigalupi - IFPU, Via Beirut, 2, 34151 Grignano, Trieste, Italy
M. Ballardini - Organization of American States
A.J. Banday - Institut de Recherche en Astrophysique et Planétologie
R.B. Barreiro - Instituto de Física de Cantabria
N. Bartolo - Osservatorio Astronomico di Padova
S. Basak - Indian Institute of Science Education and Research Thiruvananthapuram
M. Bersanelli - INFN Sezione di Milano, Via Celoria 16 - 20133, Milano, Italy
A. Besnard - Institut d'Astrophysique Spatiale
D. Blinov - University of Crete
M. Bortolami - Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
F. Bouchet - Institut d'Astrophysique de Paris
T. Brinckmann - Terra
F. Cacciotti - Dipartimento di Fisica, Università La Sapienza, P. le A. Moro 2, Roma, Italy
E. Calabrese - Cardiff University
P. Campeti - Excellence Cluster Origins
A. Carones - Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
F.J. Casas - Instituto de Física de Cantabria
K. Cheung - Lawrence Berkeley National Laboratory
M. Citran - Laboratoire AstroParticule et Cosmologie
L. Clermont - Centre Spatial de Liège, Université de Liège, Avenue du Pré-Aily, 4031 Angleur, Belgium
F. Columbro - INFN Sezione di Roma, P.le A. Moro 2, 00185 Roma, Italy
A. Coppolecchia - INFN Sezione di Roma, P.le A. Moro 2, 00185 Roma, Italy
P. de Bernardis - INFN Sezione di Roma, P.le A. Moro 2, 00185 Roma, Italy
T. de Haan - International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles
E. de la Hoz - Laboratoire AstroParticule et Cosmologie
M. De Lucia - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
S. Della Torre - INFN Sezione Milano Bicocca, Piazza della Scienza, 3, 20126 Milano, Italy
E. Di Giorgi - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
H.K. Eriksen - University of Oslo
F. Finelli - Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
C. Franceschet - INFN Sezione di Milano, Via Celoria 16 - 20133, Milano, Italy
U. Fuskeland - University of Oslo
G. Galloni - Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 1, 00133, Roma, Italy
M. Galloway - University of Oslo
M. Gervasi - University of Milano-Bicocca
T. Ghigna - International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles
S. Giardiello - Cardiff University
A. Gruppuso - Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
M. Hazumi - The Graduate University for Advanced Studies (SOKENDAI), Miura District, Kanagawa 240-0115, Hayama, Japan
L.T. Hergt - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
E. Hivon - Institut d'Astrophysique de Paris
K. Ichiki - Nagoya University
H. Jiang - The University of Tokyo, Department of Physics, Tokyo 113-0033, Japan
B. Jost - Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
K. Kohri - High Energy Accelerator Research Organization
L. Lamagna - INFN Sezione di Roma, P.le A. Moro 2, 00185 Roma, Italy
M. Lattanzi - Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
C. Leloup - Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
F. Levrier - Laboratoire de Physique de l'Ecole Normale Supérieure
M. López-Caniego - Universidad Europea
G. Luzzi - Space Science Data Center, Italian Space Agency, via del Politecnico, 00133, Roma, Italy
J. Macias-Perez - Laboratoire de Physique Subatomique et de Cosmologie
V. Maranchery - Space Science Data Center, Italian Space Agency, via del Politecnico, 00133, Roma, Italy
E. Martínez-González - Instituto de Física de Cantabria
S. Masi - INFN Sezione di Roma, P.le A. Moro 2, 00185 Roma, Italy
S. Matarrese - Gran Sasso Science Institute
T. Matsumura - Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
S. Micheli - Dipartimento di Fisica, Università La Sapienza, P. le A. Moro 2, Roma, Italy
M. Monelli - Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
L. Montier - Institut de Recherche en Astrophysique et Planétologie
G. Morgante - Organization of American States
M. Najafi - Dipartimento di Fisica, Università La Sapienza, P. le A. Moro 2, Roma, Italy
A. Novelli - University of Milano-Bicocca
F. Noviello - Cardiff University
I. Obata - High Energy Accelerator Research Organization
A. Occhiuzzi - Dipartimento di Fisica, Università La Sapienza, P. le A. Moro 2, Roma, Italy
A. Paiella - INFN Sezione di Roma, P.le A. Moro 2, 00185 Roma, Italy
D. Paoletti - Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
G. Pascual-Cisneros - Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
F. Piacentini - INFN Sezione di Roma, P.le A. Moro 2, 00185 Roma, Italy
G. Piccirilli - Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 1, 00133, Roma, Italy
G. Polenta - Space Science Data Center, Italian Space Agency, via del Politecnico, 00133, Roma, Italy
L. Porcelli - Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
N. Raffuzzi - Terra
A. Rizzieri - Laboratoire AstroParticule et Cosmologie
J.A. Rubiño-Martín - Universidad de La Laguna
Y. Sakurai - Suwa University of Science
J. Sanghavi - University of Amsterdam
D. Scott - University of British Columbia
M. Shiraishi - Suwa University of Science
G. Signorelli - Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy
R.M. Sullivan - University of Oslo
Y. Takase - Okayama University
L. Terenzi - Organization of American States
M. Tomasi - INFN Sezione di Milano, Via Celoria 16 - 20133, Milano, Italy
M. Tristram - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
L. Vacher - International School for Advanced Studies (SISSA), Via Bonomea 265, 34136, Trieste, Italy
B. van Tent - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
I.K. Wehus - University of Oslo
G. Weymann-Despres - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
Y. Zhou - International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles
LiteBIRD Collaboration
Dario Poletti - SCI,MATH & Technology
Publication Details: Journal of cosmology and astroparticle physics, Vol.2025(11), p.73
Publisher: IOP Publishing
Number of pages: 54
Identifiers: 9911308809846
Academic Unit: SCI,MATH & Technology
Language: English
Resource Type: Journal article

LiteBIRD science goals and forecasts: improved full-sky reconstruction of the gravitational lensing potential through the combination of Planck and LiteBIRD data

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