Improved Planck processing through integrated component separation
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Abstract
In this thesis we take a look at the importance of component separation in the processing of data from the Planck satellite mission. We show how integrating component separation in the form of a sky model improves the instrumental calibration in the processing of the raw data, reducing systematic instrumental effects and producing cleaner sky maps. The thesis gives an overview to the Planck data analyses of the NPIPE and the BeyondPlanck teams; the former being the first joint processing of all the Planck data in one framework; the latter being the first end-to-end Bayesian analysis framework, sampling the full posterior distribution of the model parameters allowing for full uncertainty propagation through the entire pipeline. With the frameworks of NPIPE and BeyondPlanck, we are laying the groundwork for the Cosmic Microwave Background (CMB) community to face its greatest challenge of today; the detection of divergence-free polarization in the CMB from primordial gravitational waves, giving direct evidence for cosmic inflation.List of papers
Paper I. R. Keskitalo, K. J. Andersen, and the Planck Collaboration. “Planck intermediate results LVII. Joint Planck LFI and HFI data processing”. In: A&A, November 2020, vol. 643, A42. DOI: 10.1051/0004-6361/202038073. The article is included in the thesis. Also available at: https://doi.org/10.1051/0004-6361/202038073 |
Paper II. M. Tristram, A. J. Banday, K. M. Górski, R. Keskitalo, C. R. Lawrence, K. J. Andersen, R. B. Barreiro, J. Borrill, H. K. Eriksen, R. Fernandez-Cobos, T. S. Kisner, E. Martínez-González, B. Partridge, D. Scott, T. L. Svalheim, H. Thommesen and I. K. Wehus. “Planck constraints on the tensor-to-scalar ratio”. In: A&A, March 2021, vol. 647, A128. DOI: 10.1051/0004-6361/202039585. The article is included in the thesis. Also available at: https://doi.org/10.1051/0004-6361/202039585 |
Paper III. The BeyondPlanck Collaboration. “BeyondPlanck I. Global Bayesian analysis of the Planck Low Frequency Instrument data”. In: A&A, to be submitted, arXiv:2011.05609v1. Astronomy & Astrophysics, Volume 675, A1, July 2023, doi: 10.1051/0004-6361/202244953. The article is included in the thesis. Also available at: https://doi.org/10.1051/0004-6361/202244953 |
Paper IV. K. J. Andersen, H. K. Eriksen, T. L. Svalheim and the BeyondPlanck Collaboration. “BeyondPlanck XIII. Intensity foregrounds, degeneracies and priors”. Astronomy & Astrophysics, Volume 675, A13, July 2023, doi: 10.1051/0004-6361/202243186. The article is included in the thesis. Also available at: https://doi.org/10.1051/0004-6361/202243186 |
Paper V. T. L. Svalheim, K. J. Andersen and the BeyondPlanck Collaboration. “BeyondPlanck XIV. Polarized foreground emission between 30 and 70 GHz”. arXiv:2011.08503v1. Astronomy & Astrophysics, Volume 675, A14, July 2023, doi: 10.1051/0004-6361/202243160. The article is included in the thesis. Also available at: https://doi.org/10.1051/0004-6361/202243160 |