<i>Planck</i> 2018 results
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Machine scores (provisional)
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- Teacher spread
- 0.211 · how far apart the two teachers sit on this one work
- Validation status
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Abstract
In the original version, the bounds given in Eqs. (87a) and (87b) on the contribution to the early-time optical depth, (15,30), contained a numerical error in deriving the 95th percentile from the Monte Carlo samples. The corrected 95% upper bounds are: τ(15,30) &lt; 0:018 (lowE, flat τ(15, 30), FlexKnot), (1) τ(15, 30) &lt; 0:023 (lowE, flat knot, FlexKnot): (2) These bounds are a factor of 3 larger than the originally reported results. Consequently, the new bounds do not significantly improve upon previous results from Planck data presented in Millea &amp; Bouchet (2018) as was stated, but are instead comparable. Equations (1) and (2) give results that are now similar to those of Heinrich &amp; Hu (2021), who used the same Planck 2018 data to derive a 95% upper bound of 0.020 using the principal component analysis (PCA) model and uniform priors on the PCA mode amplitudes.
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The record
- Venue
- Astronomy and Astrophysics
- Topic
- Radioactive Decay and Measurement Techniques
- Field
- Physics and Astronomy
- Canadian institutions
- Simon Fraser UniversityUniversity of British ColumbiaUniversity of Toronto
- Funders
- —
- Keywords
- PhysicsAstrophysicsPlanckAstronomy
- Has abstract in OpenAlex
- yes