Reionization science from the CMB after Planck Michael Mortonson University of C

Reionization science from the CMB after Planck Michael Mortonson University of C www.phwiki.com

Reionization science from the CMB after Planck Michael Mortonson University of C

Clark, Michael, Contributing Editor has reference to this Academic Journal, PHwiki organized this Journal Reionization science from the CMB after Planck Michael Mortonson University of Chicago July 2, 2009 Outline 1 Michael Mortonson U Chicago/KICP Outline July 2, 2009 Reionization report from June 2008 Fermilab CMBPol workshop: Zaldarriaga, Colombo, Komatsu, Lidz, Mortonson, Oh, Pierpaoli, Verde, & Zahn arXiv:0811.3918 Current reionization constraints in addition to expected improvements from Planck in addition to CMBPol (large-scale polarization) optical depth physical parameters (reionization sources) model-independent in as long as mation Separating reionization from other phenomena (e.g. inflation) Reionization July 2, 2009 Michael Mortonson U Chicago/KICP The End of Reionization Fan, Carilli, & Keating (2006)

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Michael Mortonson U Chicago/KICP Reionization peak Reionization from Large-Scale E-modes July 2, 2009 Free electrons from reionization rescatter CMB photons Local quadrupole generates polarization Scattering at low redshifts projects onto large angular scales Usual approach: inst. reion. Michael Mortonson U Chicago/KICP July 2, 2009 WMAP Optical depth: t = 0.09 ± 0.02 Mortonson & Hu (2008) Allowed effects of reionization at 6 Mmin host radiation sources that ionize regions of mass zM: [Fermilab report] WMAP Planck CMBPol

Usual approach: inst. reion. Michael Mortonson U Chicago/KICP July 2, 2009 General Reionization Histories Models of reionization may not capture all relevant physical processes How much in as long as mation about the general evolution of the ionization fraction can we get from large-scale CMB polarization (regardless of what it tells us about particular models) Usual approach: inst. reion. Michael Mortonson U Chicago/KICP July 2, 2009 General Reionization Histories Models of reionization may not capture all relevant physical processes How much in as long as mation about the general evolution of the ionization fraction can we get from large-scale CMB polarization (regardless of what it tells us about particular models) CAMB/CosmoMC module as long as general reionization models: http://background.uchicago.edu/camb-rpc Usual approach: inst. reion. Michael Mortonson U Chicago/KICP July 2, 2009 General Reionization Histories

Usual approach: inst. reion. Michael Mortonson U Chicago/KICP July 2, 2009 General Reionization Histories Second parameter Michael Mortonson U Chicago/KICP Reducing Reionization Confusion Stronger constraints on reionization parameters will improve constraints on parameters degenerate with reionization Example: inflationary features in CMB temperature in addition to polarization July 2, 2009 Second parameter Michael Mortonson U Chicago/KICP Adams et al (2001), Covi et al. (2006) July 2, 2009 Inflationary features in addition to reionization

Second parameter Michael Mortonson U Chicago/KICP Inflationary features in addition to reionization Mortonson, Dvorkin, Peiris, & Hu (2009) July 2, 2009 Planck: 2-3 s CMBPol: 5-6 s Summary Michael Mortonson U Chicago/KICP Summary Future polarization data will improve constraints on reionization parameters – several times more precise than WMAP. Can measure up to ~5 parameters describing the ionization history. Precise determination of physical parameters or reconstruction of the ionization history will likely require additional in as long as mation. Potential confusion between effects of reionization in addition to other large-scale polarization parameters can be greatly reduced. July 2, 2009

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Clark, Michael is from United States and they belong to DAILY KOS and they are from  Emeryville, United States got related to this Particular Journal. and Clark, Michael deal with the subjects like Opinion/Commentary

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