REVIEW 5 cited by
Planck 2018 results. XI. Polarized dust foregrounds
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Planck 2018 results. XI. Polarized dust foregrounds
read the original abstract
The study of polarized dust emission has become entwined with the analysis of the cosmic microwave background (CMB) polarization. We use new Planck maps to characterize Galactic dust emission as a foreground to the CMB polarization. We present Planck EE, BB, and TE power spectra of dust polarization at 353 GHz for six nested sky regions covering from 24 to 71 % of the sky. We present power-law fits to the angular power spectra, yielding evidence for statistically significant variations of the exponents over sky regions and a difference between the values for the EE and BB spectra. The TE correlation and E/B power asymmetry extend to low multipoles that were not included in earlier Planck polarization papers. We also report evidence for a positive TB dust signal. Combining data from Planck and WMAP, we determine the amplitudes and spectral energy distributions (SEDs) of polarized foregrounds, including the correlation between dust and synchrotron polarized emission, for the six sky regions as a function of multipole. This quantifies the challenge of the component separation procedure required for detecting the reionization and recombination peaks of primordial CMB B modes. The SED of polarized dust emission is fit well by a single-temperature modified blackbody emission law from 353 GHz to below 70 GHz. For a dust temperature of 19.6 K, the mean spectral index for dust polarization is $\beta_{\rm d}^{P} = 1.53\pm0.02 $. By fitting multi-frequency cross-spectra, we examine the correlation of the dust polarization maps across frequency. We find no evidence for decorrelation. If the Planck limit for the largest sky region applies to the smaller sky regions observed by sub-orbital experiments, then decorrelation might not be a problem for CMB experiments aiming at a primordial B-mode detection limit on the tensor-to-scalar ratio $r\simeq0.01$ at the recombination peak.
Forward citations
Cited by 5 Pith papers
-
Single Frequency CMB Foreground Removal with Inter-scale Machine Learning
A hybrid CNN using both inter-scale and multi-frequency dust correlations achieves residual B-mode foreground power 3.62e-4 in DustFilaments simulations, about 7x lower than spatial ILC.
-
Galactic Science with the LiteBIRD satellite: Spectral characterization of diffuse Galactic polarized emission at the angular power spectrum level
LiteBIRD is forecast to measure Galactic polarized dust and synchrotron spectral parameters with errors as low as σ(T_d)≈0.2 K, σ(β_d)≈0.006, σ(β_s)≈0.04, and to detect E/B and T/P spectral discrepancies in the diffuse ISM.
-
Calibration of CMB Polarisation Using Cross-Experiment Correlations
A data-driven method calibrates relative CMB polarization angles via cross-correlations without assuming zero isotropic birefringence or primordial EB, forecasting 0.10° and 0.17° uncertainties for SO LAT and Planck a...
-
Simultaneous inference of isotropic and anisotropic polarization rotation angles for next-generation cosmic microwave background experiments
A Bayesian power-spectrum framework simultaneously infers isotropic and anisotropic cosmic birefringence angles, instrumental miscalibration angles, and foreground parameters from simulated multi-frequency next-genera...
-
Blind mitigation of foreground-induced biases on primordial $B$ modes for ground-based CMB experiments
Two NILC extensions—one deprojecting foreground moments and one marginalizing residuals at the likelihood level—yield unbiased r estimates and consistent lensing B-mode reconstruction in SO-SAT-like simulations.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.