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1. Exploring cosmic origins with CORE: gravitational lensing of the CMB

Author

Challinor, Anthony, Allison, Rupert, Carron, Julien, Errard, Josquin, Feeney, Stephen, Kitching, Thomas, Lesgourgues, Julien, Lewis, Antony, Zubeldía, Íñigo, Achucarro, Ana, Ade, Peter, Ashdown, Mark, Ballardini, Mario, Banday, A. J., Banerji, Ranajoy, Bartlett, James, Bartolo, Nicola, Basak, Soumen, Baumann, Daniel, Bersanelli, Marco, Bonaldi, Anna, Bonato, Matteo, Borrill, Julian, Bouchet, François, Boulanger, François, Brinckmann, Thejs, Bucher, Martin, Burigana, Carlo, Buzzelli, Alessandro, Cai, Zhen-Yi, Calvo, Martino, Carvalho, Carla-Sofia, Castellano, Gabriella, Chluba, Jens, Clesse, Sebastien, Colantoni, Ivan, Coppolecchia, Alessandro, Crook, Martin, d'Alessandro, Giuseppe, de Bernardis, Paolo, de Gasperis, Giancarlo, De Zotti, Gianfranco, Delabrouille, Jacques, Di Valentino, Eleonora, Diego, Jose-Maria, Fernandez-Cobos, Raul, Ferraro, Simone, Finelli, Fabio, Forastieri, Francesco, Galli, Silvia, Genova-Santos, Ricardo, Gerbino, Martina, González-Nuevo, Joaquin, Grandis, Sebastian, Greenslade, Joshua, Hagstotz, Steffen, Hanany, Shaul, Handley, Will, Hernandez-Monteagudo, Carlos, Hervías-Caimapo, Carlos, Hills, Matthew, Hivon, Eric, Kiiveri, Kimmo, Kisner, Ted, Kunz, Martin, Kurki-Suonio, Hannu, Lamagna, Luca, Lasenby, Anthony, Lattanzi, Massimiliano, Liguori, Michele, Lindholm, Valtteri, López-Caniego, Marcos, Luzzi, Gemma, Maffei, Bruno, Martinez-González, Enrique, Martins, C. J. A. P., Masi, Silvia, McCarthy, Darragh, Melchiorri, Alessandro, Melin, Jean-Baptiste, Molinari, Diego, Monfardini, Alessandro, Natoli, Paolo, Negrello, Mattia, Notari, Alessio, Paiella, Alessandro, Paoletti, Daniela, Patanchon, Guillaume, Piat, Michel, Pisano, Giampaolo, Polastri, Linda, Polenta, Gianluca, Pollo, Agnieszka, Poulin, Vivian, Quartin, Miguel, Remazeilles, Mathieu, Roman, Matthieu, Rubino-Martin, Jose-Alberto, Salvati, Laura, Tartari, Andrea, Tomasi, Maurizio, Tramonte, Denis, Trappe, Neil, Trombetti, Tiziana, Tucker, Carole, Valiviita, Jussi, Van de Weijgaert, Rien, van Tent, Bartjan, Vennin, Vincent, Vielva, Patricio, Vittorio, Nicola, Young, Karl, and Zannoni, Mario

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Lensing of the CMB is now a well-developed probe of large-scale clustering over a broad range of redshifts. By exploiting the non-Gaussian imprints of lensing in the polarization of the CMB, the CORE mission can produce a clean map of the lensing deflections over nearly the full-sky. The number of high-S/N modes in this map will exceed current CMB lensing maps by a factor of 40, and the measurement will be sample-variance limited on all scales where linear theory is valid. Here, we summarise this mission product and discuss the science that it will enable. For example, the summed mass of neutrinos will be determined to an accuracy of 17 meV combining CORE lensing and CMB two-point information with contemporaneous BAO measurements, three times smaller than the minimum total mass allowed by neutrino oscillations. In the search for B-mode polarization from primordial gravitational waves with CORE, lens-induced B-modes will dominate over instrument noise, limiting constraints on the gravitational wave power spectrum amplitude. With lensing reconstructed by CORE, one can "delens" the observed polarization internally, reducing the lensing B-mode power by 60%. This improves to 70% by combining lensing and CIB measurements from CORE, reducing the error on the gravitational wave amplitude by 2.5 compared to no delensing (in the null hypothesis). Lensing measurements from CORE will allow calibration of the halo masses of the 40000 galaxy clusters that it will find, with constraints dominated by the clean polarization-based estimators. CORE can accurately remove Galactic emission from CMB maps with its 19 frequency channels. We present initial findings that show that residual Galactic foreground contamination will not be a significant source of bias for lensing power spectrum measurements with CORE. [abridged], Comment: 44 pages, 12 figures

Published
2017
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2. Exploring Cosmic Origins with CORE: Inflation

Author

CORE Collaboration, Finelli, Fabio, Bucher, Martin, Achúcarro, Ana, Ballardini, Mario, Bartolo, Nicola, Baumann, Daniel, Clesse, Sébastien, Errard, Josquin, Handley, Will, Hindmarsh, Mark, Kiiveri, Kimmo, Kunz, Martin, Lasenby, Anthony, Liguori, Michele, Paoletti, Daniela, Ringeval, Christophe, Väliviita, Jussi, van Tent, Bartjan, Vennin, Vincent, Allison, Rupert, Arroja, Frederico, Ashdown, Marc, Banday, A. J., Banerji, Ranajoy, Bartlett, James G., Basak, Soumen, Baselmans, Jochem, de Bernardis, Paolo, Bersanelli, Marco, Bonaldi, Anna, Borril, Julian, Bouchet, François R., Boulanger, François, Brinckmann, Thejs, Burigana, Carlo, Buzzelli, Alessandro, Cai, Zhen-Yi, Calvo, Martino, Carvalho, Carla Sofia, Castellano, Gabriella, Challinor, Anthony, Chluba, Jens, Colantoni, Ivan, Crook, Martin, D'Alessandro, Giuseppe, D'Amico, Guido, Delabrouille, Jacques, Desjacques, Vincent, De Zotti, Gianfranco, Diego, Jose Maria, Di Valentino, Eleonora, Feeney, Stephen, Fergusson, James R., Fernandez-Cobos, Raul, Ferraro, Simone, Forastieri, Francesco, Galli, Silvia, García-Bellido, Juan, de Gasperis, Giancarlo, Génova-Santos, Ricardo T., Gerbino, Martina, González-Nuevo, Joaquin, Grandis, Sebastian, Greenslade, Josh, Hagstotz, Steffen, Hanany, Shaul, Hazra, Dhiraj K., Hernández-Monteagudo, Carlos, Hervias-Caimapo, Carlos, Hills, Matthew, Hivon, Eric, Hu, Bin, Kisner, Ted, Kitching, Thomas, Kovetz, Ely D., Kurki-Suonio, Hannu, Lamagna, Luca, Lattanzi, Massimiliano, Lesgourgues, Julien, Lewis, Antony, Lindholm, Valtteri, Lizarraga, Joanes, López-Caniego, Marcos, Luzzi, Gemma, Maffei, Bruno, Mandolesi, Nazzareno, Martínez-González, Enrique, Martins, Carlos J. A. P., Masi, Silvia, McCarthy, Darragh, Matarrese, Sabino, Melchiorri, Alessandro, Melin, Jean-Baptiste, Molinari, Diego, Monfardini, Alessandro, Natoli, Paolo, Negrello, Mattia, Notari, Alessio, Oppizzi, Filippo, Paiella, Alessandro, Pajer, Enrico, Patanchon, Guillaume, Patil, Subodh P., Piat, Michael, Pisano, Giampaolo, Polastri, Linda, Polenta, Gianluca, Pollo, Agnieszka, Poulin, Vivian, Quartin, Miguel, Ravenni, Andrea, Remazeilles, Mathieu, Renzi, Alessandro, Roest, Diederik, Roman, Matthieu, Rubiño-Martin, Jose Alberto, Salvati, Laura, Starobinsky, Alexei A., Tartari, Andrea, Tasinato, Gianmassimo, Tomasi, Maurizio, Torrado, Jesús, Trappe, Neil, Trombetti, Tiziana, Tucker, Carole, Tucci, Marco, Urrestilla, Jon, van de Weygaert, Rien, Vielva, Patricio, Vittorio, Nicola, and Young, Karl

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We forecast the scientific capabilities to improve our understanding of cosmic inflation of CORE, a proposed CMB space satellite submitted in response to the ESA fifth call for a medium-size mission opportunity. The CORE satellite will map the CMB anisotropies in temperature and polarization in 19 frequency channels spanning the range 60-600 GHz. CORE will have an aggregate noise sensitivity of $1.7 \mu$K$\cdot \,$arcmin and an angular resolution of 5' at 200 GHz. We explore the impact of telescope size and noise sensitivity on the inflation science return by making forecasts for several instrumental configurations. This study assumes that the lower and higher frequency channels suffice to remove foreground contaminations and complements other related studies of component separation and systematic effects, which will be reported in other papers of the series "Exploring Cosmic Origins with CORE." We forecast the capability to determine key inflationary parameters, to lower the detection limit for the tensor-to-scalar ratio down to the $10^{-3}$ level, to chart the landscape of single field slow-roll inflationary models, to constrain the epoch of reheating, thus connecting inflation to the standard radiation-matter dominated Big Bang era, to reconstruct the primordial power spectrum, to constrain the contribution from isocurvature perturbations to the $10^{-3}$ level, to improve constraints on the cosmic string tension to a level below the presumptive GUT scale, and to improve the current measurements of primordial non-Gaussianities down to the $f_{NL}^{\rm local} < 1$ level. For all the models explored, CORE alone will improve significantly on the present constraints on the physics of inflation. Its capabilities will be further enhanced by combining with complementary future cosmological observations., Comment: Latex 107 pages, revised with updated author list and minor modifications

Published
2016
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3. Exploring Cosmic Origins with CORE: Cosmological Parameters

Author

Di Valentino, Eleonora, Brinckmann, Thejs, Gerbino, Martina, Poulin, Vivian, Bouchet, François R., Lesgourgues, Julien, Melchiorri, Alessandro, Chluba, Jens, Clesse, Sebastien, Delabrouille, Jacques, Dvorkin, Cora, Forastieri, Francesco, Galli, Silvia, Hooper, Deanna C., Lattanzi, Massimiliano, Martins, Carlos J. A. P., Salvati, Laura, Cabass, Giovanni, Caputo, Andrea, Giusarma, Elena, Hivon, Eric, Natoli, Paolo, Pagano, Luca, Paradiso, Simone, Rubino-Martin, Jose Alberto, Achucarro, Ana, Ade, Peter, Allison, Rupert, Arroja, Frederico, Ashdown, Marc, Ballardini, Mario, Banday, A. J., Banerji, Ranajoy, Bartolo, Nicola, Bartlett, James G., Basak, Soumen, Baselmans, Jochem, Baumann, Daniel, de Bernardis, Paolo, Bersanelli, Marco, Bonaldi, Anna, Bonato, Matteo, Borrill, Julian, Boulanger, François, Bucher, Martin, Burigana, Carlo, Buzzelli, Alessandro, Cai, Zhen-Yi, Calvo, Martino, Carvalho, Carla Sofia, Castellano, Gabriella, Challinor, Anthony, Charles, Ivan, Colantoni, Ivan, Coppolecchia, Alessandro, Crook, Martin, D'Alessandro, Giuseppe, De Petris, Marco, De Zotti, Gianfranco, Diego, Josè Maria, Errard, Josquin, Feeney, Stephen, Fernandez-Cobos, Raul, Ferraro, Simone, Finelli, Fabio, de Gasperis, Giancarlo, Génova-Santos, Ricardo T., González-Nuevo, Joaquin, Grandis, Sebastian, Greenslade, Josh, Hagstotz, Steffen, Hanany, Shaul, Handley, Will, Hazra, Dhiraj K., Hernández-Monteagudo, Carlos, Hervias-Caimapo, Carlos, Hills, Matthew, Kiiveri, Kimmo, Kisner, Ted, Kitching, Thomas, Kunz, Martin, Kurki-Suonio, Hannu, Lamagna, Luca, Lasenby, Anthony, Lewis, Antony, Liguori, Michele, Lindholm, Valtteri, Lopez-Caniego, Marcos, Luzzi, Gemma, Maffei, Bruno, Martin, Sylvain, Martinez-Gonzalez, Enrique, Masi, Silvia, McCarthy, Darragh, Melin, Jean-Baptiste, Mohr, Joseph J., Molinari, Diego, Monfardini, Alessandro, Negrello, Mattia, Notari, Alessio, Paiella, Alessandro, Paoletti, Daniela, Patanchon, Guillaume, Piacentini, Francesco, Piat, Michael, Pisano, Giampaolo, Polastri, Linda, Polenta, Gianluca, Pollo, Agnieszka, Quartin, Miguel, Remazeilles, Mathieu, Roman, Matthieu, Ringeval, Christophe, Tartari, Andrea, Tomasi, Maurizio, Tramonte, Denis, Trappe, Neil, Trombetti, Tiziana, Tucker, Carole, Väliviita, Jussi, van de Weygaert, Rien, Van Tent, Bartjan, Vennin, Vincent, Vermeulen, Gérard, Vielva, Patricio, Vittorio, Nicola, Young, Karl, and Zannoni, Mario

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, High Energy Physics - Theory
Abstract

We forecast the main cosmological parameter constraints achievable with the CORE space mission which is dedicated to mapping the polarisation of the Cosmic Microwave Background (CMB). CORE was recently submitted in response to ESA's fifth call for medium-sized mission proposals (M5). Here we report the results from our pre-submission study of the impact of various instrumental options, in particular the telescope size and sensitivity level, and review the great, transformative potential of the mission as proposed. Specifically, we assess the impact on a broad range of fundamental parameters of our Universe as a function of the expected CMB characteristics, with other papers in the series focusing on controlling astrophysical and instrumental residual systematics. In this paper, we assume that only a few central CORE frequency channels are usable for our purpose, all others being devoted to the cleaning of astrophysical contaminants. On the theoretical side, we assume LCDM as our general framework and quantify the improvement provided by CORE over the current constraints from the Planck 2015 release. We also study the joint sensitivity of CORE and of future Baryon Acoustic Oscillation and Large Scale Structure experiments like DESI and Euclid. Specific constraints on the physics of inflation are presented in another paper of the series. In addition to the six parameters of the base LCDM, which describe the matter content of a spatially flat universe with adiabatic and scalar primordial fluctuations from inflation, we derive the precision achievable on parameters like those describing curvature, neutrino physics, extra light relics, primordial helium abundance, dark matter annihilation, recombination physics, variation of fundamental constants, dark energy, modified gravity, reionization and cosmic birefringence. (ABRIDGED), Comment: 90 pages, 25 Figures. Revised version with new authors list and references

Published
2016
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5. Astro2020 APC White Paper: The need for better tools to design future CMB experiments

Author

Rocha, G., Banday, A.J., Barreiro, R. Belen, Challinor, Anthony, Górski, Krzysztof M., Hensley, Brandon, Jaffe, Tess, Jewell, Jeff, Keating, Brian, Kogut, Alan, Lawrence, Charles, Panopoulou, Georgia, Partridge, Bruce, Pearson, Tim, Silk, Joe, Steinhardt, Paul, Wehus, Ingunn, Bock, Jamie, Crill, Brendan, Delabrouille, Jacques, Doré, Olivier, Fernandez-Cobos, Raul, Ijjas, Anna, Keskitalo, Reijo, Kritsuk, Alexei, Mangilli, Anna, Moncelsi, Lorenzo, Myers, Steve, Steinbach, Bryan, Tristram, Matthieu, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique (ex SAP) (DAP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

This white paper addresses key challenges for the design of next-decade Cosmic Microwave Background (CMB) experiments, and for assessing their capability to extract cosmological information from CMB polarization. We focus here on the challenges posed by foreground emission, CMB lensing, and instrumental systematics to detect the signal that arises from gravitational waves sourced by inflation and parameterized by $r$, at the level of $r \sim 10^{-3}$ or lower, as proposed for future observational efforts. We argue that more accurate and robust analysis and simulation tools are required for these experiments to realize their promise. We are optimistic that the capability to simulate the joint impact of foregrounds, CMB lensing, and systematics can be developed to the level necessary to support the design of a space mission at $r \sim 10^{-4}$ in a few years. We make the case here for supporting such work. Although ground-based efforts present additional challenges (e.g., atmosphere, ground pickup), which are not addressed here, they would also benefit from these improved simulation capabilities., Comment: 10 pages + references, 4 figures; Submitted to the Astro2020 call for APC white papers

Published
2019

6. Exploring cosmic origins with CORE: Gravitational lensing of the CMB

Author

Challinor , Anthony, Allison , Rupert, Carron , Julien, Errard , Josquin, Feeney , Stephen, Kitching , Thomas, Lesgourgues , Julien, Lewis , Antony, Zubeldía , Íñigo, Achucarro , Ana, Ade , Peter, Ashdown , Mark, Ballardini , Mario, Banday , A.J., Banerji , Ranajoy, Bartlett , James, Bartolo , Nicola, Basak , Soumen, Baumann , Daniel, Bersanelli , Marco, Bonaldi , Anna, Bonato , Matteo, Borrill , Julian, Bouchet , François, Boulanger , François, Brinckmann , Thejs, Bucher , Martin, Burigana , Carlo, Buzzelli , Alessandro, Cai , Zhen-Yi, Calvo , Martino, Carvalho , Carla-Sofia, Castellano , Gabriella, Chluba , Jens, Clesse , Sebastien, Colantoni , Ivan, Coppolecchia , Alessandro, Crook , Martin, D'Alessandro , Giuseppe, De Bernardis , Paolo, De Gasperis , Giancarlo, De Zotti , Gianfranco, Delabrouille , Jacques, Di Valentino , Eleonora, Diego , Jose-Maria, Fernandez-Cobos , Raul, Ferraro , Simone, Finelli , Fabio, Forastieri , Francesco, Galli , Silvia, Genova-Santos , Ricardo, Gerbino , Martina, González-Nuevo , Joaquin, Grandis , Sebastian, Greenslade , Joshua, Hagstotz , Steffen, Hanany , Shaul, Handley , Will, Hernandez-Monteagudo , Carlos, Hervías-Caimapo , Carlos, Hills , Matthew, Luzzi , Gemma, Maffei , Bruno, Martinez-González , Enrique, Martins , C.J.A.P., Masi , Silvia, McCarthy , Darragh, Melchiorri , Alessandro, Melin , Jean-Baptiste, Molinari , Diego, Monfardini , Alessandro, Natoli , Paolo, Negrello , Mattia, Notari , Alessio, Paiella , Alessandro, Paoletti , Daniela, Patanchon , Guillaume, Piat , Michel, Pisano , Giampaolo, Polastri , Linda, Polenta , Gianluca, Pollo , Agnieszka, Poulin , Vivian, Quartin , Miguel, Remazeilles , Mathieu, Roman , Matthieu, Rubino-Martin , Jose-Alberto, Salvati , Laura, Tartari , Andrea, Tomasi , Maurizio, Tramonte , Denis, Trappe , Neil, Trombetti , Tiziana, Tucker , Carole, Valiviita , Jussi, Van De Weijgaert , Rien, Van Tent , Bartjan, Vennin , Vincent, Vielva , Patricio, Vittorio , Nicola, Young , Karl, Zannoni , Mario, Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Lagrange de Paris, Sorbonne Universités, AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Institut de recherche en astrophysique et planétologie ( IRAP ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'Astrophysique de Paris ( IAP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'astrophysique spatiale ( IAS ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Néel ( NEEL ), Université Grenoble Alpes [Saint Martin d'Hères]-Centre National de la Recherche Scientifique ( CNRS ), Département de Physique des Particules (ex SPP) ( DPP ), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Laboratoire d'Annecy-le-Vieux de Physique Théorique ( LAPTH ), Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Physique Théorique d'Orsay [Orsay] ( LPT ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), and CORE

Subjects
noise, deflection, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], B-mode: lens, gravitational radiation: primordial, cosmic background radiation: polarization, Astrophysics::Cosmology and Extragalactic Astrophysics, redshift, calibration, estimator, gravitation: lens, non-Gaussianity, galaxy: cluster, neutrino: oscillation, neutrino: mass, gravitational radiation: power spectrum, halo: mass
Abstract

International audience; Lensing of the cosmic microwave background (CMB) is now a well-developed probe of the clustering of the large-scale mass distribution over a broad range of redshifts. By exploiting the non-Gaussian imprints of lensing in the polarization of the CMB, the CORE mission will allow production of a clean map of the lensing deflections over nearly the full-sky. The number of high-S/N modes in this map will exceed current CMB lensing maps by a factor of 40, and the measurement will be sample-variance limited on all scales where linear theory is valid. Here, we summarise this mission product and discuss the science that will follow from its power spectrum and the cross-correlation with other clustering data. For example, the summed mass of neutrinos will be determined to an accuracy of 17 meV combining CORE lensing and CMB two-point information with contemporaneous measurements of the baryon acoustic oscillation feature in the clustering of galaxies, three times smaller than the minimum total mass allowed by neutrino oscillation measurements. Lensing has applications across many other science goals of CORE, including the search for B-mode polarization from primordial gravitational waves. Here, lens-induced B-modes will dominate over instrument noise, limiting constraints on the power spectrum amplitude of primordial gravitational waves. With lensing reconstructed by CORE, one can "delens" the observed polarization internally, reducing the lensing B-mode power by 60 %. This can be improved to 70 % by combining lensing and measurements of the cosmic infrared background from CORE, leading to an improvement of a factor of 2.5 in the error on the amplitude of primordial gravitational waves compared to no delensing (in the null hypothesis of no primordial B-modes). Lensing measurements from CORE will allow calibration of the halo masses of the tens of thousands of galaxy clusters that it will find, with constraints dominated by the clean polarization-based estimators. The 19 frequency channels proposed for CORE will allow accurate removal of Galactic emission from CMB maps. We present initial findings that show that residual Galactic foreground contamination will not be a significant source of bias for lensing power spectrum measurements with CORE.

Published
2018

7. Exploring Cosmic Origins with CORE: Cosmological Parameters

Author

Di Valentino, Eleonora, Brinckmann, Thejs, Gerbino, Martina, Poulin, Vivian, Bouchet, François R., Lesgourgues, Julien, Melchiorri, Alessandro, Chluba, Jens, Clesse, Sebastien, Delabrouille, Jacques, Dvorkin, Cora, Forastieri, Francesco, Galli, Silvia, Hooper, Deanna C., Lattanzi, Massimiliano, Martins, Carlos J. A. P., Salvati, Laura, Cabass, Giovanni, Caputo, Andrea, Giusarma, Elena, Hivon, Eric, Natoli, Paolo, Pagano, Luca, Paradiso, Simone, Rubino-Martin, Jose Alberto, Achucarro, Ana, Ade, Peter, Allison, Rupert, Arroja, Frederico, Ashdown, Marc, Ballardini, Mario, Banday, A. J., Banerji, Ranajoy, Bartolo, Nicola, Bartlett, James G., Basak, Soumen, Baselmans, Jochem, Baumann, Daniel, Bernardis, Paolo, Bersanelli, Marco, Bonaldi, Anna, Bonato, Matteo, Borrill, Julian, Boulanger, François, Bucher, Martin, Burigana, Carlo, Buzzelli, Alessandro, Cai, Zhen-Yi, Calvo, Martino, Carvalho, Carla Sofia, Castellano, Gabriella, Challinor, Anthony, Charles, Ivan, Colantoni, Ivan, Coppolecchia, Alessandro, Crook, Martin, D Alessandro, Giuseppe, Petris, Marco, Zotti, Gianfranco, Diego, Josè Maria, Errard, Josquin, Feeney, Stephen, Fernandez-Cobos, Raul, Ferraro, Simone, Finelli, Fabio, Gasperis, Giancarlo, Génova-Santos, Ricardo T., González-Nuevo, Joaquin, Grandis, Sebastian, Greenslade, Josh, Hagstotz, Steffen, Hanany, Shaul, Handley, Will, Hazra, Dhiraj K., Hernández-Monteagudo, Carlos, Hervias-Caimapo, Carlos, Hills, Matthew, Kiiveri, Kimmo, Kisner, Ted, Kitching, Thomas, Kunz, Martin, Kurki-Suonio, Hannu, Lamagna, Luca, Lasenby, Anthony, Lewis, Antony, Liguori, Michele, Lindholm, Valtteri, Lopez-Caniego, Marcos, Luzzi, Gemma, Maffei, Bruno, Martin, Sylvain, Martinez-Gonzalez, Enrique, Masi, Silvia, Mccarthy, Darragh, Melin, Jean-Baptiste, Mohr, Joseph J., Molinari, Diego, Monfardini, Alessandro, Negrello, Mattia, Notari, Alessio, Paiella, Alessandro, Paoletti, Daniela, Patanchon, Guillaume, Piacentini, Francesco, Piat, Michael, Pisano, Giampaolo, Polastri, Linda, Polenta, Gianluca, Pollo, Agnieszka, Quartin, Miguel, Remazeilles, Mathieu, Roman, Matthieu, Ringeval, Christophe, Tartari, Andrea, Tomasi, Maurizio, Tramonte, Denis, Trappe, Neil, Trombetti, Tiziana, Carole Tucker, Väliviita, Jussi, Weygaert, Rien, Tent, Bartjan, Vennin, Vincent, Vermeulen, Gérard, Vielva, Patricio, Vittorio, Nicola, Young, Karl, Zannoni, Mario, and Core, For The Collaboration

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