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The large scale polarization explorer (LSPE) for CMB measurements: performance forecast

Addamo, G. and Ade, P. A. R. and Baccigalupi, C. and Baldini, A. M. and Battaglia, P. M. and Battistelli, E. S. and Baù, A. and de Bernardis, P. and Bersanelli, M. and Biasotti, M. and Boscaleri, A. and Caccianiga, B. and Caprioli, S. and Cavaliere, F. and Cei, F. and Cleary, K. A. and Columbro, F. and Coppi, G. and Coppolecchia, A. and Cuttaia, F. and D'Alessandro, G. and De Gasperis, G. and De Petris, M. and Fafone, V. and Farsian, F. and Ferrari Barusso, L. and Fontanelli, F. and Franceschet, C. and Gaier, T. C. and Galli, L. and Gatti, F. and Genova-Santos, R. and Gerbino, M. and Gervasi, M. and Ghigna, T. and Grosso, D. and Gruppuso, A. and Gualtieri, R. and Incardona, F. and Jones, M. E. and Kangaslahti, P. and Krachmalnicoff, N. and Lamagna, L. and Lattanzi, M. and López-Caraballo, C. H. and Lumia, M. and Mainini, R. and Maino, D. and Mandelli, S. and Maris, M. and Masi, S. and Matarrese, S. and May, A. and Mele, L. and Mena, P. and Mennella, A. and Molina, R. and Molinari, D. and Morgante, G. and Natale, U. and Nati, F. and Natoli, P. and Pagano, L. and Paiella, A. and Panico, F. and Paonessa, F. and Paradiso, S. and Passerini, A. and Perez-de-Taoro, M. and Peverini, O. A. and Pezzotta, F. and Piacentini, F. and Piccirillo, L. and Pisano, G. and Polenta, G. and Poletti, D. and Presta, G. and Realini, S. and Reyes, N. and Rocchi, A. and Rubino-Martin, J. A. and Sandri, M. and Sartor, S. and Schillaci, A. and Signorelli, G. and Siri, B. and Soriaga, M. and Spinella, F. and Tapia, V. and Tartari, A. and Taylor, A. C. and Terenzi, L. and Tomasi, M. and Tommasi, E. and Tucker, C. and Vaccaro, D. and Vigano, D. M. and Villa, F. and Virone, G. and Vittorio, N. and Volpe, A. and Watkins, R. E. J. and Zacchei, A. and Zannoni, M. (2021) The large scale polarization explorer (LSPE) for CMB measurements: performance forecast. Journal of Cosmology and Astroparticle Physics, 2021 (8). Art. No. 008. ISSN 1475-7516. doi:10.1088/1475-7516/2021/08/008.

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The measurement of the polarization of the Cosmic Microwave Background (CMB) radiation is one of the current frontiers in cosmology. In particular, the detection of the primordial divergence-free component of the polarization field, the B-mode, could reveal the presence of gravitational waves in the early Universe. The detection of such a component is at the moment the most promising technique to probe the inflationary theory describing the very early evolution of the Universe. We present the updated performance forecast of the Large Scale Polarization Explorer (LSPE), a program dedicated to the measurement of the CMB polarization. LSPE is composed of two instruments: LSPE-Strip, a radiometer-based telescope on the ground in Tenerife-Teide observatory, and LSPE-SWIPE (Short-Wavelength Instrument for the Polarization Explorer) a bolometer-based instrument designed to fly on a winter arctic stratospheric long-duration balloon. The program is among the few dedicated to observation of the Northern Hemisphere, while most of the international effort is focused into ground-based observation in the Southern Hemisphere. Measurements are currently scheduled in Winter 2022/23 for LSPE-SWIPE, with a flight duration up to 15 days, and in Summer 2022 with two years observations for LSPE-Strip. We describe the main features of the two instruments, identifying the most critical aspects of the design, in terms of impact on the performance forecast. We estimate the expected sensitivity of each instrument and propagate their combined observing power to the sensitivity to cosmological parameters, including the effect of scanning strategy, component separation, residual foregrounds and partial sky coverage. We also set requirements on the control of the most critical systematic effects and describe techniques to mitigate their impact. LSPE will reach a sensitivity in tensor-to-scalar ratio of σ_r < 0.01, set an upper limit r < 0.015 at 95% confidence level, and improve constraints on other cosmological parameters.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Addamo, G.0000-0003-4095-7096
Ade, P. A. R.0000-0002-5127-0401
Battistelli, E. S.0000-0001-5210-7625
de Bernardis, P.0000-0001-6547-6446
Schillaci, A.0000-0002-0512-1042
Soriaga, M.0000-0002-0077-6226
Additional Information:© 2021 IOP Publishing Ltd and Sissa Medialab. Received 28 August 2020; Accepted 5 July 2021; Published 2 August 2021. The development of LSPE is supported by ASI (grant LSPE I/022/11/0) and INFN. We acknowledge the usage of the HEALPix[150] and am software packages, computational resources from NERSC, Cineca and CNAF.We acknowledge support from the COSMOS network ( through the ASI (Italian Space Agency) Grants 2016-24-H.0 and 2016-24-H.1-2018, and Sapienza University. JARM, RGS and MPdT acknowledge financial support from the Spanish Ministry of Science and Innovation (MICINN) under the project AYA2017-84185-P, and the European Union’s Horizon 2020 research and innovation programme under grant agreement number 687312 (RADIOFOREGROUNDS). The authors gratefully acknowledge the time and expertise devoted to reviewing the manuscript by the referees.
Funding AgencyGrant Number
Agenzia Spaziale Italiana (ASI)LSPE I/022/11/0
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)2016-24-H.0
Agenzia Spaziale Italiana (ASI)2016-24-H.1-2018
Sapienza UniversityUNSPECIFIED
Ministerio de Economía, Industria y Competitividad (MINECO)AYA2017-84185-P
European Research Council (ERC)687312
Subject Keywords:CMBR experiments; CMBR polarization; cosmological parameters from CMBR
Issue or Number:8
Record Number:CaltechAUTHORS:20210810-195726227
Persistent URL:
Official Citation:The LSPE collaboration et al JCAP08(2021)008
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110196
Deposited By: Tony Diaz
Deposited On:11 Aug 2021 22:02
Last Modified:16 Nov 2021 19:39

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