تقرير
Detailed study of HWP non-idealities and their impact on future measurements of CMB polarization anisotropies from space
| العنوان: | Detailed study of HWP non-idealities and their impact on future measurements of CMB polarization anisotropies from space |
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| المؤلفون: | Giardiello, Serena, Gerbino, Martina, Pagano, Luca, Errard, Josquin, Gruppuso, Alessandro, Ishino, Hirokazu, Lattanzi, Massimiliano, Natoli, Paolo, Patanchon, Guillaume, Piacentini, Francesco, Pisano, Giampaolo |
| المصدر: | A&A 671, C1 (2023) |
| سنة النشر: | 2021 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics |
| الوصف: | We study the propagation of a specific class of instrumental systematics to the reconstruction of the B-mode power spectrum of the cosmic microwave background (CMB). We focus on the non-idealities of the half-wave plate (HWP), a polarization modulator that is to be deployed by future CMB experiments, such as the phase-A satellite mission LiteBIRD. We study the effects of non-ideal HWP properties, such as transmittance, phase shift, and cross-polarization. To this end, we developed a simple, yet stand-alone end-to-end simulation pipeline adapted to LiteBIRD. We analyzed the effects of a possible mismatch between the measured frequency profiles of HWP properties (used in the mapmaking stage of the pipeline) and the actual profiles (used in the sky-scanning step). We simulated single-frequency, CMB-only observations to emphasize the effects of non-idealities on the BB power spectrum. We also considered multi-frequency observations to account for the frequency dependence of HWP properties and the contribution of foreground emission. We quantified the systematic effects in terms of a bias $\Delta r$ on the tensor-to-scalar ratio, $r$, with respect to the ideal case without systematic effects. We derived the accuracy requirements on the measurements of HWP properties by requiring $\Delta r < 10^{-5}$ (1% of the expected LiteBIRD sensitivity on $r$). Our analysis is introduced by a detailed presentation of the mathematical formalism employed in this work, including the use of the Jones and Mueller matrix representations. Comment: Published in Astronomy&Astrophysics, Volume 658 - Year 2022 / A15 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/202141619e |
| الوصول الحر: | http://arxiv.org/abs/2106.08031Test |
| رقم الانضمام: | edsarx.2106.08031 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/202141619e |
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