QUBIC II: Spectral polarimetry with bolometric interferometry

L. Mousset (1) , M.M. Gamboa Lerena , E.S. Battistelli , P. de Bernardis , P. Chanial (1) , G. d'Alessandro , G. Dashyan (2) , M. de Petris , L. Grandsire (1) , J.-Ch. Hamilton (1) , F. Incardona , S. Landau , S. Marnieros (3) , S. Masi , A. Mennella , C. O'Sullivan , M. Piat (1) , G. Ricciardi , C.G. Scóccola , M. Stolpovskiy (1) , A. Tartari , J.-P. Thermeau (1) , S.A. Torchinsky (1, 4) , F. Voisin (1) , M. Zannoni , P. Ade , J.G. Alberro , A. Almela , G. Amico , L.H. Arnaldi , D. Auguste (3) , J. Aumont (5) , S. Azzoni , S. Banfi , A. Baù , B. Bélier (6) , D. Bennett , L. Bergé (3) , J.-Ph. Bernard (5) , M. Bersanelli , M.-A. Bigot-Sazy (1) , J. Bonaparte , J. Bonis (3) , E. Bunn , D. Burke , D. Buzi , F. Cavaliere , C. Chapron (1) , R. Charlassier (1) , A.C. Cobos Cerutti , F. Columbro , A. Coppolecchia , G. de Gasperis , M. de Leo , S. Dheilly (1) , C. Duca , L. Dumoulin (3) , A. Etchegoyen , A. Fasciszewski , L.P. Ferreyro , D. Fracchia , C. Franceschet , K.M. Ganga (1) , B. García , M.E. García Redondo , M. Gaspard (3) , D. Gayer , M. Gervasi , M. Giard (5) , V. Gilles , Y. Giraud-Heraud (1) , M. Gómez Berisso , M. González , M. Gradziel , M.R. Hampel , D. Harari , S. Henrot-Versillé (3) , E. Jules (3) , J. Kaplan (1) , C. Kristukat , L. Lamagna , S. Loucatos (1, 7) , T. Louis (3) , B. Maffei (2) , S. Mandelli , W. Marty (5) , A. Mattei , A. May , M. Mcculloch , L. Mele , D. Melo , L. Montier (5) , L.M. Mundo , J.A. Murphy , J.D. Murphy , F. Nati , E. Olivieri (3) , C. Oriol (3) , A. Paiella , F. Pajot (5) , A. Passerini , H. Pastoriza , A. Pelosi , C. Perbost (1) , M. Perciballi , F. Pezzotta , F. Piacentini , L. Piccirillo , G. Pisano , M. Platino , G. Polenta , D. Prêle (1) , R. Puddu , D. Rambaud (5) , E. Rasztocky , P. Ringegni , G.E. Romero , J.M. Salum , A. Schillaci , S. Scully , S. Spinelli , G. Stankowiak (1) , A.D. Supanitsky , P. Timbie , M. Tomasi , C. Tucker , G. Tucker , D. Viganò , N. Vittorio , F. Wicek (3) , M. Wright , A. Zullo

1 APC (UMR_7164) - AstroParticule et Cosmologie
2 IAS - Institut d'astrophysique spatiale
3 IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
4 OP - Observatoire de Paris - Site de Paris
5 IRAP - Institut de recherche en astrophysique et planétologie
6 C2N - Centre de Nanosciences et de Nanotechnologies [Orsay]
7 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

Bolometric interferometry is a novel technique that has the ability to perform spectral imaging. A bolometric interferometer observes the sky in a wide frequency band and can reconstruct sky maps in several sub-bands within the physical band in post-processing of the data. This provides a powerful spectral method to discriminate between the cosmic microwave background (CMB) and astrophysical foregrounds. In this paper, the methodology is illustrated with examples based on the Q & U Bolometric Interferometer for Cosmology (QUBIC) which is a ground-based instrument designed to measure the B-mode polarization of the sky at millimeter wavelengths. We consider the specific cases of point source reconstruction and Galactic dust mapping and we characterize the point spread function as a function of frequency. We study the noise properties of spectral imaging, especially the correlations between sub-bands, using end-to-end simulations together with a fast noise simulator. We conclude showing that spectral imaging performance are nearly optimal up to five sub-bands in the case of QUBIC.

Mots clés: CMBR experiments; CMBR theory; cosmological parameters from CMBR; gravitational waves and CMBR polarization

Domaines: Instrumentations et Détecteurs [physics.ins-det]

L. Mousset, M.M. Gamboa Lerena, E.S. Battistelli, P. de Bernardis, P. Chanial, et al.. QUBIC II: Spectral polarimetry with bolometric interferometry. JCAP, 2022, 04 (04), pp.035. ⟨10.1088/1475-7516/2022/04/035⟩. ⟨hal-03010993⟩