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Reconstructing the Primordial Power Spectrum

Published online by Cambridge University Press:  23 September 2016

S. L. Bridle,
A. M. Lewis,
J. Weller and
G. Efstathiou
S. L. Bridle
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
A. M. Lewis
Affiliation:
CITA, 60 St. George St, Toronto M5S 3H8, ON, Canada
J. Weller
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
G. Efstathiou
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK

Abstract

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We reconstruct the shape of the primordial power spectrum from the latest cosmic microwave background data, including the new results from the Wilkinson Microwave Anisotropy Probe (WMAP), and large scale structure data from the two degree field galaxy redshift survey (2dFGRS). We discuss two parameterizations taking into account the uncertainties in four cosmological parameters. First we parameterize the initial spectrum by a tilt and a running spectral index, finding marginal evidence for a running spectral index only if the first three WMAP multipoles (ℓ = 2, 3, 4) are included in the analysis. Secondly, to investigate further the low CMB large scale power, we modify the conventional power-law spectrum by introducing a scale above which there is no power. We find a preferred position of the cut at k c ∼ 3 × 10--4 Mpc--1 although k c = 0 (no cut) is not ruled out.

Information

Type
Session I: Cosmic Microwave Background and Cosmology
Information
Symposium - International Astronomical Union , Volume 216: Maps of the Cosmos , 2005, pp. 28 - 34
Copyright
Copyright © Astronomical Society of the Pacific 2005 

References

Albrecht, A., & Steinhardt, P. J. 1982, PRL, 48, 1220 Google Scholar
Barriga, J., Gaztañaga, E., Santos, M. G., & Sarkar, S. 2001, MNRAS, 324, 977 CrossRefGoogle Scholar
Bridle, S. L., Lewis, A. N., Weller, J. W., & Efstathiou, G. P. 2003, MNRAS, 342, L72 Google Scholar
Christensen, N., Meyer, R., Knox, L., & Luey, B. 2001, Classical and Quantum Gravity 18, 2677 Google Scholar
Contaldi, C., Peloso, M., Kofman, L., & Linde, A. 2003, JCAP, 307, 2 Google Scholar
Efstathiou, G. 2003, MNRAS, 343, L95 Google Scholar
Grainge, K., et al. 2003, MNRAS, 341, L23 Google Scholar
Guth, A. H. 1981, PRD, 23, 347 Google Scholar
Hinshaw, M., et al. 2003, ApJS, 148, 135 CrossRefGoogle Scholar
Kinney, W. H. 2001, PRD, 63, 43001 CrossRefGoogle Scholar
Kogut, A., et al. 2003, ApJS, 148, 161 CrossRefGoogle Scholar
Kuo, C. L., et al. 2004, ApJ, 600, 32 Google Scholar
Lewis, A., & Bridle, S. 2002, PRD, 66, 103511 Google Scholar
Lewis, A., Challinor, A., & Lasenby, A. 2000 ApJ 538, 473 Google Scholar
Linde, A. D. 1982, Phys. Lett., B108, 389 Google Scholar
Linde, A. D. 1990, Particle Physics and Inflationary Cosmology (Chur: Harwood Academic Publishers)CrossRefGoogle Scholar
Lyth, D. H., & Riotto, A. A. 1999, Phys. Rep., 314, 1 Google Scholar
Mukherjee, P., & Wang, Y. 2003a, ApJ, 599, 1 Google Scholar
Mukherjee, P., & Wang, Y. 2003b, ApJ, 593, 38 Google Scholar
Mukherjee, P., & Wang, Y. 2003c, ApJ, 598, 779 CrossRefGoogle Scholar
Pearson, T., et al. 2003, ApJ, 591, 556 Google Scholar
Peiris, H., et al. 2003, ApJS, 148, 213 Google Scholar
Percival, W. J., et al. 2002, MNRAS, 337, 1068 Google Scholar
Seljak, U., McDonald, P., & Makarov, A. 2003, MNRAS, 342, L79 Google Scholar
Seljak, U., & Zaldarriaga, M. 1996, ApJ, 469, 437 Google Scholar
Souradeep, T., Bond, J. R., Knox, L., Efstathiou, G., & Turner, M. S. 1998, in COSMO-97, First International Workshop on Particle Physics and the Early Universe, ed. Roszkowski, L. (Singapore: World Scientific), 389, astro-ph/9802262 Google Scholar
Spergel, D., et al. 2003, ApJS, 148, 175 CrossRefGoogle Scholar
Steinhardt, P. J. & Turok, N. 2002, Science 296, 1436 Google Scholar
Tegmark, M., de Oliveira-Costa, A., & Hamilton, A. 2003, PRD, 68, 123523 Google Scholar
Verde, L., et al. 2003, ApJS, 148, 195 Google Scholar
Wang, Y., & Mathews, G. J. 2002, ApJ, 573, 1 Google Scholar
Wang, Y., Spergel, D. N., & Strauss, M. A. 1999, ApJ, 510, 20 Google Scholar