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Neutrinos and Cosmology

Neutrinos and Cosmology. NOW 2010 , Conca-Specchiulla September 7th 2010. Alessandro Melchiorri Universita’ di Roma, “La Sapienza”. New WMAP results from 7 years of observations. Komatsu et al, 2010, 1001.4538. Komatsu et al, 2010, 1001.4538.

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Neutrinos and Cosmology

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  1. Neutrinos and Cosmology NOW 2010, Conca-Specchiulla September 7th 2010 Alessandro Melchiorri Universita’ di Roma, “La Sapienza”

  2. New WMAP resultsfrom 7 yearsofobservations Komatsuet al, 2010, 1001.4538

  3. Komatsuet al, 2010, 1001.4538

  4. New Measurements,MoreParameters ! • Neutrino masses • Neutrino effectivenumber • PrimordialHelium

  5. Small scale CMB can probe Helium abundance at recombination.

  6. Komatsuet al, 2010, 1001.4538

  7. Komatsuet al, 2010, 1001.4538 Neutrino background. Changesearly ISW. Hintfor N>3 ?

  8. Gianpiero Mangano, Alessandro Melchiorri, Olga Mena, Gennaro Miele, Anze Slosar Journal-ref: JCAP0703:006,2007

  9. Current constraints on neutrino mass from Cosmology (Fogli et al, 2010 in preparation). Blue: WMAP-7 Red: w7+SN+Bao+H0Green: w7+CMBsuborb+SN+LRG+H0 (Plot made by Luca Pagano)

  10. Current constraints on neutrino mass from Cosmology (Fogli et al, 2010 in preparation). Blue: WMAP-7 Red: w7+SN+Bao+H0Green: w7+CMBsuborb+SN+LRG+H0 (Plot made by Luca Pagano)

  11. Sudden Reionization As we don’t know precisely the details of the reionization history we should consider more general reionization scenarios CAMB Notes, Antony Lewis

  12. MH’s Reionization Following Mortonson & Hu we can parametrize the reionization history as a free function of the redshift by decomposing the free electron fraction as The principal components Sm(z) are the eigenfunctions of the Fisher matrix of an ideal, cosmic variance limited, experiment. mm are the amplitudes of the Sm(z) xfid(z) is the WMAP fiducial model at which the FM is computed M. J. Mortonson and W. Hu ApJ 686, L53 (2008)

  13. Impact of generalized reionization on CMB constraints on Neutrino Mass Archidiacono, Cooray, Melchiorri, Pandolfi, 2010, PRD

  14. Planck Satellite launch 14/5/2009

  15. Blue: current data Red: Planck

  16. Let’s consider not only Planck but also ACTpol (From Atacama Cosmology Telescope, Ground based, results expected by 2013) CMBpol (Next CMB satellite, 2020 ?) Galli, Martinelli, Melchiorri, Pagano, Sherwin, Spergel, PRD submitted, arXiv:1005.3808 2010

  17. Constraints on Neutrino Mass Blue: Planck Red: Planck+ACTpol Green: CMBPol Galli, Martinelli, Melchiorri, Pagano, Sherwin, Spergel, PRD submitted, arXiv:1005.3808 2010

  18. Constraints on Neutrino Number Blue: Planck Red: Planck+ACTpol Green: CMBPol Galli, Martinelli, Melchiorri, Pagano, Sherwin, Spergel, PRD submitted, arXiv:1005.3808 2010

  19. Constraints on Helium Abundance Blue: Planck Red: Planck+ACTpol Green: CMBPol Galli, Martinelli, Melchiorri, Pagano, Sherwin, Spergel, PRD submitted, arXiv:1005.3808 2010

  20. CONCLUSIONS • Recent CMB measurementsfullyconfirmL-CDM. Improvedconstraints on inflation • With future measurementsconstraints on newparametersrelatedtolaboratory • Physics could be achieved. • In 2012 from Planck we will know: • If the total neutrino mass is less than 0.5eV. • If there is an extra background of relativistic particles. • Helium abundance with 0.01 accuracy. We Want NOW 2012 !

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