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Experimental Probe of Inflationary Cosmology (comparison of three EPIC versions)

Experimental Probe of Inflationary Cosmology (comparison of three EPIC versions). Asantha Cooray University of California-Irvine. Post-Planck Mission Effort in US. Deliverables. The ell to which measurements are cosmic variance limited. (1) Nolta et al. 2008

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Experimental Probe of Inflationary Cosmology (comparison of three EPIC versions)

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  1. Experimental Probe of Inflationary Cosmology (comparison of three EPIC versions) Asantha Cooray University of California-Irvine

  2. Post-Planck Mission Effort in US

  3. Deliverables The ell to which measurements are cosmic variance limited (1) Nolta et al. 2008 (2) HFI, based on Planck Blue Book

  4. Before EPIC-IM (2008): EPIC-LC and EPIC-CS

  5. Phase I: Two mission options

  6. EPIC-IM (2008/2009 version)

  7. EPIC=EPIC IM EPIC CS = Cosmic variance

  8. Last word on the “Age question” Our final age determination will be accurate to 25 Myrs. This is enabled by the cosmic variance limited E-mode measurement.

  9. Inflationary Parameters Amplitude of the inflationary gravitational waves depends only on the energy scale of inflation. Interpretation is NOT model-dependent. The information captured by the inflationary gravitational wave background is unique, it cannot be obtained even with a perfect measurement of the scalar spectral index and its running.

  10. Lensing studies with EPIC Unlensed Lensed Difference Foreground Mass Lensed

  11. All Sky Maps of Projected Gravitational Potential 8º Optimal Quadratic (Hu 2001) Likelihood (Hirata & Seljak 2003) Theoretical projected potential Gravitational potential determined from CMB polarization and temperature maps sensitive to - neutrino masses - dark energy All-sky potential map: maps to cosmic limits on the whole sky! - a legacy for every future study of structure formation

  12. Measuring the lensing power spectrum NET muK/sqrt(sec) one-year

  13. Lensing Removal and the Search for Gravitational-wave B-modes

  14. What is the optimal resolution for lens de-cleaning? Beam increasing ~4 arcmins is the ideal beam size Scientific Gain = (T/S-limit with lens cleaning)/(without cleaning)

  15. Particle physics application of EPIC CMB lensing probes linear fluctuations Source properties known (Both these lead to systematic errors in galaxy lensing) Lensing B-modes and CMB Cosmic Shear Reconstruction neutrino mass (Σmν < 0.05 eV; from the linear regime) Test SuperK Atmosphere oscillations that suggest Δmν2∼ 2x10-3 eV2 and distinguish between two mass hierarchies

  16. What is the neutrino mass hierarchy? EPIC can not only measure the total sum of neutrino masses, but when combined with atmospheric oscillation result for the mass-squared difference, establish individual masses of all three neutrino species. Better than (<) 6 arcmin resolution is a requirement for EPIC to enable CMB lensing studies. The measurement cannot be achieved with a lensing analysis in a small patch of the sky. All-sky coverage is essential.

  17. Did dark energy exist at z> 2? In some models of dark energy, a small contribution exist to the total energy density budget of the Universe at z >2. CMB lensing probes cosmology at z of 2 to 4, where the lensing efficiency is highest. EPIC can constrain the early dark energy density to better than 0.1%. (Half-sky weak lensing with planned Euclid can only constrain same down to 2.5%. JDEM with 4000 deg2, down to 7.5%)

  18. When and how did the Universe reionize? Astrophysics Measurement

  19. Reionization history Model-dependent constraints

  20. Model-independent constraints Reionization history EPIC allows cosmic variance extraction of 5 components.

  21. Mapping Galactic Magnetic Fields over the Whole Sky Map of full sky with σP < 0.3 % Planck EPIC-IM How does large-scale Galactic field related to field in embedded star-forming regions?

  22. Summary

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