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Title: Inflationary features and shifts in cosmological parameters from Planck 2015 data

Abstract

We explore the relationship between features in the Planck 2015 temperature and polarization data, shifts in the cosmological parameters, and features from inflation. Residuals in the temperature data at low multipole ℓ, which are responsible for the high H 0 ≈ 70 km s –1 Mpc –1 and low σ 8$$Ω^{1/2}_{m}$$ values from ℓ < 1000 in power-law ΛCDM models, are better fit to inflationary features with a 1.9σ preference for running of the running of the tilt or a stronger 99% CL local significance preference for a sharp drop in power around k = 0.004 Mpc –1 in generalized slow roll and a lower H 0 ≈ 67km s –1 Mpc –1. The same in-phase acoustic residuals at ℓ >1000 that drive the global H 0 constraints and appear as a lensing anomaly also favor running parameters which allow even lower H 0, but not once lensing reconstruction is considered. Polarization spectra are intrinsically highly sensitive to these parameter shifts, and even more so in the Planck 2015 TE data due to an outlier at ℓ ≈ 165,which disfavors the best fit H 0 ΛCDM solution by more than 2σ, and high H 0 value at almost 3σ. Current polarization data also slightly enhance the significance of a sharp suppression of large-scale power but leave room for large improvements in the future with cosmic variance limited E-mode measurements.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1595678
Alternate Identifier(s):
OSTI ID: 1405213
Grant/Contract Number:  
[SC0009924; PHY-0551142; FG02-13ER41958; NNX15AK22G]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
[ Journal Volume: 96; Journal Issue: 8]; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Obied, Georges, Dvorkin, Cora, Heinrich, Chen, Hu, Wayne, and Miranda, Vinicius. Inflationary features and shifts in cosmological parameters from Planck 2015 data. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.083526.
Obied, Georges, Dvorkin, Cora, Heinrich, Chen, Hu, Wayne, & Miranda, Vinicius. Inflationary features and shifts in cosmological parameters from Planck 2015 data. United States. doi:10.1103/PhysRevD.96.083526.
Obied, Georges, Dvorkin, Cora, Heinrich, Chen, Hu, Wayne, and Miranda, Vinicius. Sun . "Inflationary features and shifts in cosmological parameters from Planck 2015 data". United States. doi:10.1103/PhysRevD.96.083526. https://www.osti.gov/servlets/purl/1595678.
@article{osti_1595678,
title = {Inflationary features and shifts in cosmological parameters from Planck 2015 data},
author = {Obied, Georges and Dvorkin, Cora and Heinrich, Chen and Hu, Wayne and Miranda, Vinicius},
abstractNote = {We explore the relationship between features in the Planck 2015 temperature and polarization data, shifts in the cosmological parameters, and features from inflation. Residuals in the temperature data at low multipole ℓ, which are responsible for the high H0 ≈ 70 km s–1 Mpc–1 and low σ8$Ω^{1/2}_{m}$ values from ℓ < 1000 in power-law ΛCDM models, are better fit to inflationary features with a 1.9σ preference for running of the running of the tilt or a stronger 99% CL local significance preference for a sharp drop in power around k = 0.004 Mpc–1 in generalized slow roll and a lower H0 ≈ 67km s–1 Mpc–1. The same in-phase acoustic residuals at ℓ >1000 that drive the global H0 constraints and appear as a lensing anomaly also favor running parameters which allow even lower H0, but not once lensing reconstruction is considered. Polarization spectra are intrinsically highly sensitive to these parameter shifts, and even more so in the Planck 2015 TE data due to an outlier at ℓ ≈ 165,which disfavors the best fit H0 ΛCDM solution by more than 2σ, and high H0 value at almost 3σ. Current polarization data also slightly enhance the significance of a sharp suppression of large-scale power but leave room for large improvements in the future with cosmic variance limited E-mode measurements.},
doi = {10.1103/PhysRevD.96.083526},
journal = {Physical Review D},
number = [8],
volume = [96],
place = {United States},
year = {2017},
month = {10}
}

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