Reconstructing the primordial power spectrum

By Sarah Bridle, A. Lewis, Jochen Weller, G. Efstathiou. 2003

217 citations recorded by the source corpus.

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) similar to 3 X 10(-4) Mpc(-1) although k(c) = 0 (no cut) is not ruled out.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/37a56a4b1c439ba0843cb7d046d3a2dde137cb60

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Citations in the corpus

The Simons Observatory: science goals and forecasts (2018, background): “Similar approaches at reconstructing the primordial power are followed by, e.g., Bridle et al. (2003); Guo et al. (2011); Hložek et al. (2012); Aich et al. (2013); Hunt and Sarkar (2014); de Putter et al. (2014); Miranda et al. (2016); Hazra et al. (2016); Obied et al. (2017).”
Cosmological parameters from cosmic microwave background measurements and the final 2dF Galaxy Redshift Survey power spectrum (2006, background): “One interpretation of this apparent discrepancy is that new physics may be needed (e.g. Bridle et al. 2003a; Efstathiou 2003).”
The Atacama Cosmology Telescope: cosmological parameters from three seasons of data (2013, unknown): “Deviations from scale invariance have been tested in a variety of models and contexts (e.g., Wang et al. 1999; Tegmark & Zaldar-riaga 2002; Bridle et al. 2003; Hannestad 2003; Martin & Ringeval 2004a,b; Sealfon et al. 2005; Spergel et al. 2007; Verde & Peiris 2008; Peiris & Verde 2010; V´azquez et…”
Suppressing the lower multipoles in the CMB anisotropies (2003, methodology): “A similar problem is encountered in other attempts [21, 22, 23, 24, 25, 26].”
FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: COSMOLOGICAL INTERPRETATION (2008, unknown): “…people have investigated various, more general ways of reconstructing the shape of PR(k) (Matsumiya et al. 2002, 2003; Mukherjee & Wang 2003b,a,c; Bridle et al. 2003; Kogo et al. 2004; Kogo et al. 2005; Hu & Okamoto 2004; Hannestad 2004; Shafieloo & Souradeep 2004; Sealfon et al. 2005;…”
Punctuated inflation and the low CMB multipoles (2008, unknown): “[4, 33–37]).”
Does the small CMB quadrupole moment suggest new physics (2003, background): “[13] found that the data favor having such a modified primordial spectrum at the 2σ level, whereas [12] obtain weaker evidence for a cutoff.”
CMB-S4 Science Case, Reference Design, and Project Plan (2019, unknown): “, [36, 37, 38, 39, 40, 41, 42, 43])”