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Planck Diffuse Component Separation TWG2.1 Review

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Planck Diffuse Component Separation TWG2.1 Review

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    1. Planck Diffuse Component Separation TWG2.1 Review coordinators Carlo Baccigalupi, Simon Prunet, Michael Linden-Vornle Paris, November 24, 2001

    2. Members & Criticalities Results & Activities, Oct.2002 Results & Activities, Nov.2003 Work Group Activities Interactions with other TWGs Near Future Spectral Matching Flexible MEM & COBE FastICA & COBE systematics removal FastICA & polarisation IFA Spatial Matching Harmonic FastICA TWG2.1 Review Contents

    3. TWG2.1 Members Mark Ashdown, Vladislav Stolyarov (CPAC, Cambridge) Carlo Baccigalupi, Francesca Perrotta (SISSA, Trieste) James Bartlett, Alain Bouquet, Jacques Delabrouille, Yannick Giraud-Heraud, Jean Kaplan (CdF, Paris) Luigi Bedini, Emanuele Salerno, Anna Tonazzini, Ercan Kuruoglu (IEI, Pisa) Carlo Burigana, Lucia Popa (TeSRE, Bologna) Krzysztof Gorski (MPA, Munich) Eric Hivon, Jeffrey Jewell, Steve Levin (JPL, Pasadena) Patrick Leahy (Jodrell Bank) Michael Linden-Vornle (DSRI, Copenaghen) Davide Maino (Milano) Simon Prunet (IAP, Paris) Benjamin Wandelt (Princeton)

    4. TWG2.1 Criticalities Unique package Flexibility Maps, Harmonics & TODs Blind & non-Blind merging Polarisation Complementarity New techniques & development Test with incoming CMB data

    5. TWG2.1 Criticalities status at the Santander meeting, Oct. 2002 Unique package Flexibility results,ongoing Maps, Harmonics & TODs results,ongoing Blind & non-Blind merging results,ongoing Polarisation ongoing Complementarity results New techniques & development ongoing Test with incoming CMB data results,ongoing

    6. TWG2.1 Criticalities status at the Paris meeting, Nov. 2003 Unique package Flexibility results+,ongoing+ Maps, Harmonics & TODs results,ongoing+ Blind & non-Blind merging results+,ongoing+ Polarisation results Complementarity results New techniques & development results,ongoing+ Test with incoming CMB data results+,ongoing+

    7. TWG2.1 Results Review status at the Santander meeting, Oct. 2002

    8. TWG2.1 Activity Review status at the Santander meeting, Oct. 2002

    9. TWG2.1 Results Review status at the Paris meeting, Nov. 2002 Spectral Matching (Delabrouille et al. 2003) Flexible MEM & COBE (Barreiro et al. 2003) FastICA & COBE (Maino et al. 2003) Systematic removal (Delabrouille et al. 2002) FastICA & polarisation (Baccigalupi et al. 2003) Spatial Matching (Bedini et al. 2003)

    10. TWG2.1 Activity Review status at the Paris meeting, Nov. 2002 IFA testing (Kuruoglu et al. 2003) SM on Archeops data (Delabrouille et al. 2003) Harmonic (Maino et al. 2003) FastICA & WMAP

    11. Spectral Matching Concept Cl of the components to recover, mixing matrix, even noise considered as parameters fit those parameters by matching with real data in the harmonic domain control degeneracies with available priors (CMB frequency scaling, approximate template and frequency scalings for foregrounds, )

    12. Spectral Matching Results Delabrouille et al. 2003

    13. Flexible MEM & COBE Priors are only partially known when dealing with real data make MEM flexible by running with many priors and estabilishing the ``Goodness of the results by matching with real data Perform Monte Carlo simulations to quantify the effect of systematics and apply to real data

    14. Flexible MEM & COBE Barreiro et al. 2003

    15. Astrophysical Component Separation on COBE-DMR 4yr data with FastICA D.Maino, A.J. Banday, C. Baccigalupi, F.Perrotta, K.M.Grski MNRAS, 2003, 344, 544

    16. Introduction

    17. Component Separation Approaches

    18. Component Separation Problem - I

    19. Component Separation Problem II

    20. FastICA algorithm - I

    21. FastICA algorithm - II

    22. FastICA algorithm - III

    23. FastICA algorithm - IV

    24. Application to COBE-DMR 4yr data

    25. Impact of noise distribution and amplitude

    26. Testing Noise Distribution

    27. Simulations Results - I

    28. Simulations Results - II

    29. Results - CMB

    30. Extracting Cosmological Parameters

    31. Qrms and n cosmological parameters

    32. Adding priors on foregrounds

    33. Results Foreground Emissions - I

    34. Results Foreground Emissions - II

    35. Results Foreground Emissions - III

    36. Results Foreground Emissions - IV

    37. Conclusions - I

    38. Conclusions - II

    39. Systematics Removal: an example Long spatial correlations in noise can be seen as a signal, seen in different timeline portions in detectors at different frequencies, in the Fourier space, detectors scanning the same circle see the noise shifted by a phase factor, include the noise in the components to separate and extract.

    40. Systematics Removal Delabrouille et al. 2002

    41. The foreground contamination is worse and priors are weaker in polarisation with respect to total intensity exploit the statistical difference in background and foreground signals, and the great detail of high resolution maps, in ideal conditions if the nominal performance is satisfactory, check degradation with systematics Component Separation & Polarisation

    42. Component Separation & Polarisation Baccigalupi et al. 2003

    43. Harmonic Approach to Components Separation with FastICA D.Maino, A.J.Banday, C.Baccigalupi, F.Perrotta, M.A.J.Ashdown, K.M.Grski

    44. Motivations

    46. Component Separation Problem - II

    47. FastICA algorithm - I

    48. FastICA algorithm - II

    49. FastICA algorithm - III

    50. FastICA algorithm - IV

    52. Preliminary Results Noiseless case

    53. The First TWG2.1 meeting although we are late with the results Template made in coordination between Level S (Martin Reineke) and TWG2.1 Existing methods acting on the same simulated database Evaluation criteria estabilished Link with CTP

    54. NASA & ICA A proposal submitted to NASA Long-Term Space Astrophysics Program

    55. An example of Planckian TWG links

    56. WMAP Unique approach failed (so far) Local approaches ongoing (FastICA, )

    57. New TWG2.1 meeting soon Planck TODs have been simulated with foregrounds and known systematics Man power lacking to produce maps out of them New TWG2.1 meeting, multi-frequency map-making and component separation Timely for Planck as a whole, Unique Package criticality, testing and development

    58. TITLE

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