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We have studied full-sky dust polarized spectral energy distribution (SED) using the latest Planck satellite data from 100 to 353 GHz. Dust emission, if not properly modelled and subtracted, will prevent us to measure the Cosmic Microwave Background (CMB) B-modes and consequently the primordial gravitational waves. In this study we traced for the first time the spatial variation of the dust polarization SED, showing that spatial residuals of polarization EE and BB modes behaves totally different from total intensity.
The plots show how the extrapolation from a total intensity model (red and blue light lines on the middle plot) is not sufficient to explain the signal observed in polarization. Considering the variation of polarization angles along the line of sight (red and blue lines on the right plot) we fulfill the gap, setting new requirements for component separation methods needed for the next generation of CMB experiments.
The pre-print is available here DOI: https://doi.org/10.1051/0004-6361/202244269
Main publications
Main publications
Absolute Reference for Microwave Polarization Experiments. The COSMOCal Project and its Proof of Concept
Ritacco, A., L. Bizzarri, S. Savorgnano, F. Boulanger et al. 2024
Publications of the Astronomical Society of the Pacific, Volume 136, Number 11
https://iopscience.iop.org/article/10.1088/1538-3873/ad8aed
Dust polarization spectral dependence from Planck HFI data.
Turning point for cosmic microwave background polarization-foreground modeling
Ritacco, A., Boulanger, F., Guillet, V., Delouis, J.-M., Puget, J.-L., Aumont, J., & Vacher, L. 2023
Astronomy & Astrophysics, Volume 670, id.A163, 12 pp. https://doi.org/10.1051/0004-6361/202244269Probing Cosmic Inflation with the LiteBIRD Cosmic Microwave Background Polarization Survey
LiteBIRD collaboration (including Ritacco)
https://doi.org/10.48550/arXiv.2202.02773 submitted to PTEP
Development and application of metamaterial-based half-wave plates for the NIKA and NIKA2 polarimeters.
Pisano, G., Ritacco, A. et al. (2022).
Astron. Astrophys., 658, A24. doi:10.1051/0004-6361/202038643. arXiv: 2006.12081 [astro-ph.IM]Crab nebula at 260 GHz with the NIKA2 polarimeter: Implications for the polarization angle calibration of future CMB experiments.
Ritacco, A. et al. (2022b).
EPJ Web Conf., 257, 00042. doi:10.1051/epjconf/202225700042. arXiv: 2111.02143 [astro-ph.CO]Absolute calibration of the polarisation angle for future CMB B-mode experiments from current and future measurements of the Crab nebula.
Aumont, J., Macıas-Pérez, J. F., Ritacco, A., Ponthieu, N., & Mangilli, A. (2020).
Astron. Astrophys., 634, A100. doi:10.1051/0004-6361/201833504. arXiv: 1805.10475 [astro-ph.CO]Observing with NIKA2Pol from the IRAM 30m telescope: Early results on the commissioning phase.
Ritacco, A. et al. (2020a).
EPJ Web Conf., 228, 00022. doi:10.1051/epjconf/202022800022. arXiv: 1912.07894 [astro-ph.IM]The NIKA polarimeter on science targets: Crab nebula observations at 150 GHz and dual-band polarization images
of Orion Molecular Cloud OMC-1.
Ritacco, A. et al. (2020b).
EPJ Web Conf., 228, 00021. doi:10.1051/epjconf/202022800021. arXiv: 1911.06277 [astro-ph.GA]NIKA2 observations around LBV stars Emission from stars and circumstellar material.
Rizzo, J. R., Ritacco, A., & Bordiu, C. (2020).
EPJ Web Conf., 228, 00023. doi:10.1051/epjconf/202022800023. arXiv: 1909.06089 [astro-ph.SR]A slowly expanding torus associated with the candidate LBV MGE 042.0787+00.5084.
Bordiu, C., Rizzo, J. R., & Ritacco, A. (2019).
Monthly Notices of the Royal Astronomical Society, 482(2), 1651–1663. doi:10.1093/mnras/sty2726. arXiv: 1810.04897 [astro-ph.SR]NIKA 150 GHz polarization observations of the Crab nebula and its spectral energy distribution.
Ritacco, A., Macıas-Pérez, J. F., Ponthieu, N. et al. (2018).
Astron. Astrophys., 616, A35. doi:10.1051/0004-6361/201731551. arXiv: 1804.09581 [astro-ph.CO]Polarimetry at millimeter wavelengths with the NIKA camera: calibration and performance.
Ritacco, A., Ponthieu, N., Catalano, A. et al. (2017).
Astron. Astrophys., 599, A34. doi:10.1051/0004-6361/201629666. arXiv: 1609.02042 [astro-ph.IM]First Polarised Light with the NIKA Camera.
Ritacco, A. et al. (2016).
J. Low Temp. Phys., 184(3-4), 724–732. doi:10.1007/s10909-015-1340-8. arXiv: 1508.00747 [astro-ph.IM]NIKA 2: next-generation continuum/polarized camera at the IRAM 30 m telescope and its prototype.
Ritacco, A. et al. (2015).
PoS, EXTRA-RADSUR2015, 016. doi:10.22323/1.267.0016. arXiv: 1602.01605 [astro-ph.IM]
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