1 / 17

Hemispherical Power Asymmetry 郭宗宽

Hemispherical Power Asymmetry 郭宗宽. 昆明 2013.11.2. anomalies in CMB map. t he quadrupole-octopole alignment p ower deficit at low- l hemispherical asymmetry parity asymmetry the cold spot ……. data analysis. the CMB temperature sky maps is modeled as.

ataret
Download Presentation

Hemispherical Power Asymmetry 郭宗宽

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Hemispherical Power Asymmetry郭宗宽 昆明 2013.11.2

  2. anomalies in CMB map • the quadrupole-octopole alignment • power deficit at low-l • hemispherical asymmetry • parity asymmetry • the cold spot • ……

  3. data analysis the CMB temperature sky maps is modeled as C.Gordon, W.Hu, D.Hutererand T.M.Crawford, arXiv:astro-ph/0509301 the likelihood is given by H.K.Eriksen, A.J.Banday, K.M.Gorski, F.K.Hansenand P.B.Lilje, arXiv:astro-ph/0701089

  4. the full covariance matrix is • WMAP3: (l, b) = (225◦,−27◦), A=0.114

  5. WMAP5(l<64, 4.5◦): (l, b) = (224◦,−22◦), A=0.0720.022 • Planck: J.Hoftuft, H.K.Eriksen, A.J.Banday, K.M.Gorski, F.K.Hansenand P.B.Lilje, arXiv:0903.1229 P.A.R.Ade et al. [Planck Collaboration], arXiv:1303.5083

  6. dependence on smoothing scale preferred dipole directions

  7. Comment: the dipole anisotropy induced by our velocity the temperature and direction in the observed frame the inferred temperature fluctuations (l, b) = (264◦,48◦)

  8. models • a parameterization [astro-ph/0509301] • our peculiar motion [arXiv:1304.3506] • a gauge field [arXiv:1302.7304] • anisotropic metric [arXiv:1303.6058] • a modulation of a cosmological parameter [arXiv:1303.6949] • a superhorizon perturbation [arXiv:0806.0377] • …… [arXiv:yymm.xxxx]

  9. asuperhorizon perturbation the Sachs-Wolfe effect A.L.Erickcek, M.Kamionkowski and S.M.Carroll, arXiv:0806.0377

  10. the diploe modulation of curvature perturbation D.H.Lyth, arXiv:1304.1270 the asymmetry A is a single modulated mode Z.G.Liu, Z.K.Guo and Y.S.Piao, arXiv:1304.6527

  11. the CMB angular power spectrum the GZ effect (the Sachs-Wolfe approximation) observational constraint

  12. a single-field slow-roll inflation • a curvaton-type field • a bounce inflation A.L.Erickcek, M.Kamionkowski and S.M.Carroll, arXiv:0806.0377 D.H.Lyth, arXiv:1304.1270 Z.G.Liu, Z.K.Guo and Y.S.Piao, arXiv:1304.6527

  13. primordial power spectrum of curvature perturbations

  14. outlook • semispherical power asymmetry • power deficit on large angular scales • signals in the TEand EE spectra? • scale dependent? A<0.015 (99% CL)

  15. Thanks!

More Related