Superimposed oscillations in the WMAP data
By Jérôme Martin, C. Ringeval. 2003
136 citations recorded by the source corpus.
The possibility that the cosmic variance outliers present in the recently released Wilkinson Microwave Anisotropy Probe (WMAP) multipole moments are due to oscillations in the primordial power spectrum is investigated. Since the most important contribution to the WMAP likelihood originates from the outliers at a relatively small angular scale (around the first Doppler peak), special attention is paid to these in contrast with previous studies on the subject which have concentrated on the large scales outliers only (i.e., the quadrupole and octupole). As a physically motivated example, the case where the oscillations are of trans-Planckian origin is considered. It is shown that the presence of the oscillations causes an important drop in the WMAP χ2 of about 15. The F test reveals that such a drop has a probability less than 0.06% to occur by chance and can therefore be considered as statistically significant.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/19bdcb64afca2fa05175b181451ba380bb4eab05
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In Astronomy and Astrophysics
- Jérôme Martin
- C. Ringeval
- Robert Brandenberger
- R. Easther
- Peter Adshead
- J. Pritchard
- Abraham Loeb
- U. Danielsson
In Nuclear and High Energy Physics
Citations in the corpus
- Oscillations in the CMB from axion monodromy inflation (2009, unknown): “39) also shows that instead of starting in the Bunch-Davies state and then following the mode through the resonance, one may start the evolution after the resonance has occurred but use a state that is different from the Bunch-Davies state, which is similar to what is considered in [22, 23, 8, 9, 10”
- Inflation after WMAP3: confronting the slow-roll and exact power spectra with CMB data (2006, methodology): “atio, the only two scales available in the theoryk. These superimposed oscillations are then tested against the data and used as a tool to detect non-trivial features in the primordial power spectrum [126, 127, 128, 129, 130, 131, 132, 133, 134, 135]. It was shown in Ref. [107, 129, 131, 130] that a”