Abstract
Extracting a sky map of the Cosmic Microwave Background (CMB) from multi-channel measurements can be seen as a component separation problem in a special context: only one component is of interest (the CMB) and its column in the mixing matrix and its probability distribution are known with high accuracy. The purpose of this paper is not to present a new algorithm but rather to discuss, on a purely theoretical basis, the impact of the statistical modeling of the components in a simple case. To do so, we analyze a model of noise-free CMB observations contaminated by coherent components. We show that the maximum likelihood estimate of the CMB in this model does not depend of the model of the contamination.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
Of course, such a \({\mathbf {w}}{^\dagger }\) would then be nothing else than the first row of \({{\mathbf {A}}}{^{-1}}\).
- 2.
The pre-processing \({{\mathbf {P}}}\) is only introduced here as a ‘mathematical device’ but a similar idea is actually implemented in the SEVEM algorithm for CMB extraction [3].
References
The Planck mission of ESA. http://www.cosmos.esa.int/web/planck/home
Abrial, P., Moudden, Y., Starck, J.-L., Fadili, J., Delabrouille, J., Nguyen, M.K.: CMB data analysis and sparsity. Stat. Methodol. 5(4), 289–298 (2008)
The Planck collaboration: Planck 2013 results. XII. Diffuse component separation. Astronomy and Astrophysics, 571, November 2014
Delabrouille, J., et al.: A full sky, low foreground, high resolution CMB map from WMAP. A&A 493(3), 835–857 (2009). arXiv:0807.0773
Cardoso, J.-F., et al.: Component separation with flexible models. application to the separation of astrophysical emissions. IEEE J. Sel. Top. Signal Process. 2, 735–746 (2008). arXiv:0803.1814
Leach, S.M., et al.: Component separation methods for the Planck mission. Astron. Astrophys. 491, 597–615 (2008). arXiv:0805.0269
Tegmark, M., de Oliveira-Costa, A., Hamilton, A.J.: High resolution foreground cleaned CMB map from WMAP. Phys. Rev. D, 68(12):123523-+, December 2003
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2017 Springer International Publishing AG
About this paper
Cite this paper
Cardoso, JF. (2017). On Extracting the Cosmic Microwave Background from Multi-channel Measurements. In: Tichavský, P., Babaie-Zadeh, M., Michel, O., Thirion-Moreau, N. (eds) Latent Variable Analysis and Signal Separation. LVA/ICA 2017. Lecture Notes in Computer Science(), vol 10169. Springer, Cham. https://doi.org/10.1007/978-3-319-53547-0_38
Download citation
DOI: https://doi.org/10.1007/978-3-319-53547-0_38
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-53546-3
Online ISBN: 978-3-319-53547-0
eBook Packages: Computer ScienceComputer Science (R0)