Explanipedia

Characterization of a half wave plate and a polarizer for accurate starlight polarimetry Open

P. de Bernardis, Silvia Masi, Giulia Barbieri Ripamonti, F. Columbro · 2025

In the process of developing a space-based imaging Stokes polarimeter for starlight polarization measurements, we established a procedure to characterize its two main optical components: the wave plate and the polarizer. We demonstrate tha…

Requirements on bandpass resolution and measurement precision for LiteBIRD Open

S. Giardiello, A. Carones, T. Ghigna, L. Pagano, F. Piacentini , et al. · 2025

Systematic effects can hinder the sought-after detection of primordial gravitational waves, impacting the reconstruction of the B -mode polarization signal which they generate in the cosmic microwave background (CMB). In this work, we stud…

LiteBIRD science goals and forecasts: constraining isotropic cosmic birefringence Open

E. de la Hoz, P. Diego-Palazuelos, Josquin Errard, A. Gruppuso, Baptiste Jost , et al. · 2025

Cosmic birefringence (CB) is the rotation of the photons' linear polarisation plane during propagation. Such an effect is a tracer of parity-violating extensions of standard electromagnetism and would probe the existence of a new cosmologi…

MISTRAL: Science Perspectives and Performance Forecasts Open

Giovanni Isopi, E. Barbavara, E. S. Battistelli, P. de Bernardis, F. Cacciotti , et al. · 2025

The MIllimeter Sardinia radio Telescope Receiver based on Array of Lumped elements (MISTRAL) KIDs is a millimeter camera operating at 90GHz that was recently installed on the Sardinia Radio Telescope (SRT) as part of the SRT-HighFreq progr…

The kinetic inductance detectors for the MISTRAL instrument: Installation and characterization at the Sardinia Radio Telescope Open

A. Paiella, F. Cacciotti, Giovanni Isopi, E. Barbavara, E. S. Battistelli , et al. · 2025

The Cryogenic System of the MISTRAL Instrument: Design and In-lab Performance Open

A. Coppolecchia, Alessandro Carbone, Alessandro Gentilucci, E. Barbavara, E. S. Battistelli , et al. · 2025

We describe the design and performance of the cryostat and the multi-stage sub-K single-shot sorption cooler for the MIllimeter Sardinia Radio Telescope Receiver based on Array of Lumped elements kids (MISTRAL) experiment. MISTRAL is a W-b…

Requirements on the gain calibration for LiteBIRD polarisation data with blind component separation Open

F. Carralot, A. Carones, N. Krachmalnicoff, T. Ghigna, A. Novelli , et al. · 2025

The detection of primordial B modes of the cosmic microwave background (CMB) could provide information about the early stages of the Universe's evolution. The faintness of this signal requires exquisite calibration accuracy and control of …

Multi-dimensional optimisation of the scanning strategy for the LiteBIRD space mission Open

Y. Takase, L. Vacher, H. Ishino, G. Patanchon, L. Montier , et al. · 2024

Large angular scale surveys in the absence of atmosphere are essential for measuring the primordial B-mode power spectrum of the Cosmic Microwave Background (CMB). Since this proposed measurement is about three to four orders of magnitude …

Spectral Imaging with QUBIC: building astrophysical components from Time-Ordered-Data using Bolometric Interferometry Open

M. Régnier, T Laclavere, J.–Ch. Hamilton, Emory F. Bunn, V Chabirand , et al. · 2024

The detection of B-modes in the CMB polarization pattern is a major issue in modern cosmology and must therefore be handled with analytical methods that produce reliable results. We describe a method that uses the frequency dependency of t…

Spectral Imaging with QUBIC: building frequency maps from Time-Ordered-Data using Bolometric Interferometry Open

P. Chanial, M. Régnier, J.–Ch. Hamilton, Emory F. Bunn, V Chabirand , et al. · 2024

The search for relics from the inflation era in the form of B-mode polarization of the CMB is a major challenge in cosmology. The main obstacle appears to come from the complexity of Galactic foregrounds that need to be removed. Multi-freq…

The MISTRAL Instrument and the Characterization of Its Detector Array Open

A. Paiella, F. Cacciotti, Giovanni Isopi, Eleonora Barbavara, E. S. Battistelli , et al. · 2024

The MIllimeter Sardinia radio Telescope Receiver based on Array of Lumped elements KIDs, MISTRAL, is a cryogenic LEKID camera, operating in the W band ( $${77}{-}{103\,\textrm{GHz}}$$ ) from the Gregorian focus of the 64-m aperture …

A 350 GHz array of LEKIDs for balloon-borne CMB observations Open

F. Cacciotti, A. Paiella, Camille Avestruz, R. Basu Tackur, E. S. Battistelli , et al. · 2024

We present the design, optimization and laboratory characterization of an array of Lumped Element Kinetic \nInductance Detectors sensitive in a frequency band centered at 350 GHz. The array consists of 313 feed-horn \ncoupled pixels with r…

A Cryogenic Testbed for Polarization Modulators and Cryogenic Mechanisms Open

F. Columbro, P. de Bernardis, A. Coppolecchia, Elisabetta Marchitelli, S. Masi , et al. · 2024

We developed a cryogenic facility to assess the performance of different types of cryogenic mechanisms. The facility can host very large (up to $$\sim {1}\,\hbox {m}^{3}$$ ) and heavy (up to $$\sim {30}\,\hbox {kg}$$ ) instrume…

LiteBIRD Science Goals and Forecasts. Mapping the Hot Gas in the Universe Open

M. Remazeilles, M. Douspis, J. A. Rubiño-Martín, A. J. Banday, Jens Chluba , et al. · 2024

We assess the capabilities of the LiteBIRD mission to map the hot gas distribution in the Universe through the thermal Sunyaev-Zeldovich (SZ) effect. Our analysis relies on comprehensive simulations incorporating various sources of Galacti…

Systematic effects induced by half-wave plate differential optical load and TES nonlinearity for LiteBIRD Open

S. Micheli, T. de Haan, T. Ghigna, Alessandro Novelli, F. Piacentini , et al. · 2024

LiteBIRD, a forthcoming satellite mission, aims to measure the polarization of the Cosmic Microwave Background (CMB) across the entire sky. The experiment will employ three telescopes, Transition-Edge Sensor (TES) bolometers and rotating H…

Measuring the CMB spectral distortions with COSMO: the multi-mode antenna system Open

E. Manzan, Lílian Maria José Albano, C. Franceschet, E. S. Battistelli, P. de Bernardis , et al. · 2024

In this work, we present the design and manufacturing of the two multi-mode antenna arrays of the COSMO experiment and the preliminary beam pattern measurements of their fundamental mode compared with simulations. COSMO is a cryogenic Mart…

Impact of beam far side-lobe knowledge in the presence of foregrounds for LiteBIRD Open

C. Leloup, G. Patanchon, Josquin Errard, C. Franceschet, Jon E. Gudmundsson , et al. · 2024

We present a study of the impact of a beam far side-lobe lack of knowledge on the measurement of the Cosmic Microwave Background B -mode signal at large scale. Beam far side-lobes induce a mismatch in the transfer function of Galactic fore…

LiteBIRD science goals and forecasts: a full-sky measurement of gravitational lensing of the CMB Open

A.I. Lonappan, Toshiya Namikawa, G. Piccirilli, P. Diego-Palazuelos, M. Ruiz-Granda , et al. · 2024

We explore the capability of measuring lensing signals in LiteBIRD full-sky polarization maps. With a 30 arcmin beam width and an impressively low polarization noise of 2.16 μ K-arcmin, LiteBIRD will be able to measure the full-sky polariz…

LiteBIRD science goals and forecasts: improving sensitivity to inflationary gravitational waves with multitracer delensing Open

Toshiya Namikawa, A.I. Lonappan, C. Baccigalupi, N. Bartolo, D. Beck , et al. · 2024

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,…

LiteBIRD Science Goals and Forecasts: Primordial Magnetic Fields Open

D. Paoletti, J. A. Rubiño-Martín, Maresuke Shiraishi, D. Molinari, Jens Chluba , et al. · 2024

We present detailed forecasts for the constraints on primordial magnetic fields (PMFs) that will be obtained with the LiteBIRD satellite. The constraints are driven by the effects of PMFs on the CMB anisotropies: the gravitational effects …

OLIMPO: A balloon-borne SZE imager to probe ICM dynamics and the WHIM Open

Jack Sayers, Camille Avestruz, R. Basu Thakur, E. S. Battistelli, Esra Bülbül , et al. · 2024

OLIMPO is a proposed Antarctic balloon-borne Sunyaev-Zel’dovich effect (SZE) imager to study gas dynamics associated with structure formation along with the properties of the warm-hot intergalactic medium (WHIM) residing in the connective …

Observing galaxy clusters and the cosmic web through the Sunyaev Zel’dovich effect with MISTRAL Open

E. S. Battistelli, E. Barbavara, P. de Bernardis, F. Cacciotti, Valentina Capalbo , et al. · 2024

Galaxy clusters and surrounding medium, can be studied using X-ray bremsstrahlung emission and Sunyaev Zel’dovich (SZ) effect. Both astrophysical probes, sample the same environment with different parameters dependance. The SZ effect is re…

Impact of beam far side-lobe knowledge in the presence of foregrounds for LiteBIRD Open

C. Leloup, G. Patanchon, J. Errard, C. Franceschet, Jon E. Gudmundsson , et al. · 2023

We present a study of the impact of an uncertainty in the beam far side-lobe knowledge on the measurement of the Cosmic Microwave Background $B$-mode signal at large scale. It is expected to be one of the main source of systematic effects …

LiteBIRD Science Goals and Forecasts: A full-sky measurement of gravitational lensing of the CMB Open

A.I. Lonappan, Toshiya Namikawa, G. Piccirilli, P. Diego-Palazuelos, M. Ruiz-Granda , et al. · 2023

We explore the capability of measuring lensing signals in $LiteBIRD$ full-sky polarization maps. With a $30$ arcmin beam width and an impressively low polarization noise of $2.16\,μ$K-arcmin, $LiteBIRD$ will be able to measure the full-sky…

LiteBIRD Science Goals and Forecasts. A Case Study of the Origin of Primordial Gravitational Waves using Large-Scale CMB Polarization Open

P. Campeti, Eiichiro Komatsu, C. Baccigalupi, M. Ballardini, N. Bartolo , et al. · 2023

We study the possibility of using the $LiteBIRD$ satellite $B$-mode survey to constrain models of inflation producing specific features in CMB angular power spectra. We explore a particular model example, i.e. spectator axion-SU(2) gauge f…

Dark performance of the MISTRAL LEKIDs Open

F. Cacciotti, Alesandro Paiella, Giovanni Isopi, Eleonora Barbavara, E. S. Battistelli , et al. · 2023

MISTRAL, Millimetric Sardinia radio Telescope Receiver based on Array of Lumped elements KIDs, is a W-Band cryogenic LEKID camera installed on the Sardinia Radio Telescope (SRT), in Italy. The MISTRAL detector array has been designed to wo…

Observing galaxy clusters and the cosmic web through the Sunyaev Zel'dovich effect with MISTRAL Open

E. S. Battistelli, E. Barbavara, P. de Bernardis, F. Cacciotti, Valentina Capalbo , et al. · 2023

Galaxy clusters and surrounding medium, can be studied using X-ray bremsstrahlung emission and Sunyaev Zel'dovich (SZ) effect. Both astrophysical probes, sample the same environment with different parameters dependance. The SZ effect is re…

Probing cosmic inflation with the LiteBIRD cosmic microwave background polarization survey Open

Erwan Allys, Kam Arnold, J. Aumont, S. Azzoni, C. Baccigalupi , et al. · 2023

LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and fundamental physics. The Japan Aerospace Exploration Agency…

The COSmic Monopole Observer (COSMO) Open

S. Masi, E. S. Battistelli, P. de Bernardis, F. Columbro, A. Coppolecchia , et al. · 2023

The COSmic Monopole Observer (COSMO) is an experiment to measure low-level spectral distortions in the isotropic component of the Cosmic Microwave Background (CMB). Deviations from a pure blackbody spectrum are expected at low level (< …

High angular resolution Sunyaev Zel’dovich observations: The case of MISTRAL Open

E. S. Battistelli, Eleonora Barbavara, P. de Bernardis, F. Cacciotti, Valentina Capalbo , et al. · 2023

The MIllimeter Sardinia radio Telescope Receiver based on Array of Lumped \nelements kids, MISTRAL, is a millimetric ($\\simeq 90GHz$) multipixel camera \nbeing built for the Sardinia Radio Telescope. It is going to be a facility \ninstrum…

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