REVIEW 7 cited by
The Atacama Cosmology Telescope: Constraints on Cosmic Birefringence
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
Signed reviews
abstract
We present new constraints on anisotropic birefringence of the cosmic microwave background polarization using two seasons of data from the Atacama Cosmology Telescope covering $456$ square degrees of sky. The birefringence power spectrum, measured using a curved-sky quadratic estimator, is consistent with zero. Our results provide the tightest current constraint on birefringence over a range of angular scales between $5$ arcminutes and $9$ degrees. We improve previous upper limits on the amplitude of a scale-invariant birefringence power spectrum by a factor of between $2$ and $3$. Assuming a nearly-massless axion field during inflation, our result is equivalent to a $2\,\sigma$ upper limit on the Chern-Simons coupling constant between axions and photons of $g_{\alpha\gamma}<4.0\times 10^{-2}/H_I$ where $H_I$ is the inflationary Hubble scale.
Forward citations
Cited by 7 Pith papers
-
Cosmic birefringence from a joint analysis of ACT and Planck
A joint analysis of Planck and ACT CMB polarization finds a nonzero cosmic birefringence angle of 0.277° ± 0.057°, at 4.8σ, with systematics still to be understood.
-
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...
-
Constraints on Anisotropic Cosmic Birefringence from CMB B-mode Polarization
The combined analysis of SPTpol, ACT, POLARBEAR, and BICEP data constrains the anisotropic cosmic birefringence amplitude to ACB = 0.42^{+0.40}_{-0.34} × 10^{-4}, consistent with zero.
-
Planck PR4 (NPIPE) map-space cosmic birefringence
A map-space stacking analysis of Planck PR4 maps finds a CMB polarization rotation angle of about 0.46 to 0.48 degrees, dominated by instrument calibration uncertainty and consistent with no parity-violating cosmic bi...
-
A short review on Quintom dark energy theory
Quintom dark energy models permit the equation of state to cross w=-1, supporting bouncing cosmologies and CMB-based tests of dark energy nature.
-
Ultralight fuzzy dark matter review
A review of fuzzy dark matter that surveys the models, wave phenomenology, numerical methods, and current observational mass constraints of ultralight dark matter.
-
Cosmic Polarisation Rotation from CMB Data: a Review for GR110
A review of CMB constraints on cosmic birefringence, reporting a possible 3 sigma hint for isotropic rotation and null anisotropic results.
Discussion (0). Continue with ORCID to comment.