The evens and odds of CMB anomalies
Abstract
The lack of power of large-angle CMB anisotropies is known to increase its statistical significance at higher Galactic latitudes, where a string-inspired pre-inflationary scale can also be detected. Considering the Planck 2015 data, and relying largely on a Bayesian approach, we show that the effect is mostly driven by the even - harmonic multipoles with , which appear sizably suppressed in a way that is robust with respect to Galactic masking, along with the corresponding detections of . On the other hand, the first odd - multipoles are only suppressed at high Galactic latitudes. We investigate this behavior in different sky masks, constraining through even and odd multipoles, and we elaborate on possible implications. We include low- polarization data which, despite being noise-limited, help in attaining confidence levels of about 3 in the detection of . We also show by direct forecasts that a future all-sky -mode cosmic-variance-limited polarization survey may push the constraining power for beyond 5 .
- Authors:
-
- Istituto Nazionale di Fisica Nucleare (INFN), Bologna (Italy); Istituto Nazionale di Astrofisica (INAF), Bologna (Italy). Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
- Tokyo Metropolitan Univ. (Japan)
- Istituto Nazionale di Fisica Nucleare (INFN), Ferrara (Italy)
- INAF-IASF, Bologna (Italy); Univ. degli Studi di Ferrara (Italy); Istituto Nazionale di Astrofisica (INAF), Bologna (Italy). Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
- Istituto Nazionale di Fisica Nucleare (INFN), Ferrara (Italy); INAF-IASF, Bologna (Italy); Univ. degli Studi di Ferrara (Italy)
- Scuola Normale Superiore and INFN, Pisa (Italy)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1543538
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of the Dark Universe
- Additional Journal Information:
- Journal Volume: 20; Journal Issue: C; Journal ID: ISSN 2212-6864
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics
Citation Formats
Gruppuso, A., Kitazawa, N., Lattanzi, M., Mandolesi, N., Natoli, P., and Sagnotti, A. The evens and odds of CMB anomalies. United States: N. p., 2018.
Web. doi:10.1016/j.dark.2018.03.002.
Gruppuso, A., Kitazawa, N., Lattanzi, M., Mandolesi, N., Natoli, P., & Sagnotti, A. The evens and odds of CMB anomalies. United States. https://doi.org/10.1016/j.dark.2018.03.002
Gruppuso, A., Kitazawa, N., Lattanzi, M., Mandolesi, N., Natoli, P., and Sagnotti, A. Sat .
"The evens and odds of CMB anomalies". United States. https://doi.org/10.1016/j.dark.2018.03.002. https://www.osti.gov/servlets/purl/1543538.
@article{osti_1543538,
title = {The evens and odds of CMB anomalies},
author = {Gruppuso, A. and Kitazawa, N. and Lattanzi, M. and Mandolesi, N. and Natoli, P. and Sagnotti, A.},
abstractNote = {The lack of power of large-angle CMB anisotropies is known to increase its statistical significance at higher Galactic latitudes, where a string-inspired pre-inflationary scale can also be detected. Considering the Planck 2015 data, and relying largely on a Bayesian approach, we show that the effect is mostly driven by the even - harmonic multipoles with , which appear sizably suppressed in a way that is robust with respect to Galactic masking, along with the corresponding detections of . On the other hand, the first odd - multipoles are only suppressed at high Galactic latitudes. We investigate this behavior in different sky masks, constraining through even and odd multipoles, and we elaborate on possible implications. We include low- polarization data which, despite being noise-limited, help in attaining confidence levels of about 3 in the detection of . We also show by direct forecasts that a future all-sky -mode cosmic-variance-limited polarization survey may push the constraining power for beyond 5 .},
doi = {10.1016/j.dark.2018.03.002},
journal = {Physics of the Dark Universe},
number = C,
volume = 20,
place = {United States},
year = {Sat Mar 17 00:00:00 EDT 2018},
month = {Sat Mar 17 00:00:00 EDT 2018}
}
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