What is recorded here?
A 2015 joint analysis of BICEP2/Keck and Planck polarization maps found substantial Galactic dust contribution to the observed B-mode power and set a model-dependent limit r at pivot 0.05 per Mpc below 0.12 at 95% confidence. A later BICEP/Keck analysis adding 2016–2018 data and using WMAP and Planck maps reported r below 0.036 at 95% under its stated foreground and cosmological model.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
Both limits depend on foreground and cosmological assumptions. The 2021 baseline removes the earlier external dust spectral-index prior but retains a parametric foreground model, assumptions about lensing and synchrotron, and systematic uncertainties; its data overlap earlier analyses. The 2015 approximately seven-sigma lensing B-mode detection is not a primordial gravitational-wave detection. Neither upper limit establishes primordial tensor modes.
Read the original work
- A Joint Analysis of BICEP2/Keck Array and Planck Data
- BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
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People and systems
P. A. R. Ade; N. Aghanim; Z. Ahmed; M. Amiri
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged. The recorded author list is incomplete.
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English catalogue narrative
BICEP/Keck and Planck foreground analysis and primordial B-mode constraints
A 2015 joint analysis of BICEP2/Keck and Planck polarization maps found substantial Galactic dust contribution to the observed B-mode power and set a model-dependent limit r at pivot 0.05 per Mpc below 0.12 at 95% confidence. A later BICEP/Keck analysis adding 2016–2018 data and using WMAP and Planck maps reported r below 0.036 at 95% under its stated foreground and cosmological model.
Scientific scope
Both limits depend on foreground and cosmological assumptions. The 2021 baseline removes the earlier external dust spectral-index prior but retains a parametric foreground model, assumptions about lensing and synchrotron, and systematic uncertainties; its data overlap earlier analyses. The 2015 approximately seven-sigma lensing B-mode detection is not a primordial gravitational-wave detection. Neither upper limit establishes primordial tensor modes.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
P. A. R. Ade; N. Aghanim; Z. Ahmed; M. Amiri
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.