Cosmic Birefringence from Planck Data Release 4

Diego-Palazuelos, P.; Eskilt, J. R.; Minami, Y.; Tristram, M.; Sullivan, R. M.; Banday, A. J.; Barreiro, R. B.; Eriksen, H. K.; Górski, K. M.; Keskitalo, R.; Komatsu, E.; Martínez-González, E.; Scott, D.; Vielva, P.; Wehus, I. K.

doi:10.48550/arxiv.2201.07682

Cited by 6 publications

(18 citation statements)

References 67 publications

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“…On the other hand, a smaller Galactic mask gave EB correlations with a fluctuating sign over multipoles . This mask dependence was confirmed by Diego-Palazuelos et al (2022) where a declining measurement of β was found when ignoring the intrinsic EB power spectra of the foreground using polarized data from the Planck public release 4 (PR4) (Planck Collaboration Int. LVII 2020), often called the "NPIPE" release.…”

Section: Introductionmentioning

confidence: 67%

“…As in previous work (Diego-Palazuelos et al 2022;Minami & Komatsu 2020a), we bin the spectra into groups of ∆ = 20 multipoles to minimize noise and cosmic variance. We focus only on high-multipoles by using min = 51 and max = 1490 which gives the number of bins N bins = 72.…”

Section: Methodsmentioning

confidence: 99%

“…We will also consider the possibility of β ν ∝ ν 2 which has been predicted from quantum gravity theories that can modify the dispersion relation of photons (Myers & Pospelov 2003). We can therefore learn a lot about the origin of the measured cosmic birefringence result of Diego-Palazuelos et al (2022) by quantifying the frequency dependence of the signal.…”

Section: Theorymentioning

confidence: 99%

“…In Minami & Komatsu (2020a) and Diego-Palazuelos et al (2022), the cosmic birefringence angle β was assumed to be independent of the photon frequency ν. In this paper, we explore a possible frequency dependence.…”

Section: Introductionmentioning

confidence: 99%

“…Other constraints have come from looking at Lorentz violating origins, such as Kahniashvili et al (2008) using WMAP data. No detection of a frequency-dependent β has been found, but this work will generalize the methods of Diego-Palazuelos et al (2022) and Minami & Komatsu (2020a) to search for such a frequency dependence. They assumed that β was constant for all frequencies, which gave them a hint of a non-zero β.…”

Section: Introductionmentioning

confidence: 99%

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Frequency-Dependent Constraints on Cosmic Birefringence from the LFI and HFI Planck Data Release 4

Eskilt

2022

Preprint

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We present new constraints on the frequency dependence of the cosmic birefringence angle from the Planck data release 4 polarization maps. An axion field coupled to electromagnetism predicts a nearly frequency-independent birefringence angle, β ν = β, while Faraday rotation from local magnetic fields and Lorentz violating theories predict a cosmic birefringence angle that is proportional to the frequency, ν, to the power of some integer n, β ν ∝ ν n . In this work, we first sample β ν individually for each polarized HFI frequency band in addition to the 70 GHz channel from the LFI. We also constrain a power-law formula for the birefringence angle, β ν = β 0 (ν/ν 0 ) n , with ν 0 = 150 GHz. For a nearly full-sky measurement, f sky = 0.93, we find β 0 = 0.26 • ± 0.11 • (68% C.L.) and n = −0.45 +0.61 −0.82 when we ignore the intrinsic EB correlations of the polarized foreground emission, and β 0 = 0.33 • ± 0.12 • and n = −0.37 +0.49 −0.64 when we use a filamentary dust model for the foreground EB. Next, we use all the polarized Planck maps, including the 30 and 44 GHz frequency bands. These bands have a negligible foreground contribution from polarized dust emission. We, therefore, treat them separately. Without any modeling of the intrinsic EB of the foreground, we generally find that the inclusion of the 30 and 44 GHz frequency bands raises the measured values of β ν and tightens n. At nearly full-sky, we measure β 0 = 0.29 •+0.10 • −0.11 • and n = −0.35 +0.48 −0.47 . Assuming no frequency dependence, we measure β = 0.33 • ± 0.10 • . If our measurements have effectively mitigated the EB of the foreground, our constraints are consistent with a mostly frequency-independent signal of cosmic birefringence.

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Section: Introductionmentioning

confidence: 67%

Section: Methodsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Frequency-Dependent Constraints on Cosmic Birefringence from the LFI and HFI Planck Data Release 4

Eskilt

2022

Preprint

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Parity violation in primordial tensor non-Gaussianities from matter bounce cosmology

Akama,

Zhu

2024

J. Cosmol. Astropart. Phys.

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It has been shown that primordial tensor non-Gaussianities from a cubic Weyl action with a non-dynamical coupling are suppressed by the so-called slow-roll parameter in a conventional framework of slow-roll inflation. In this paper, we consider matter bounce cosmology in which the background spacetime is no longer quasi-de Sitter, and hence one might expect that the matter bounce models could predict non-suppressed non-Gaussianities. Nevertheless, we first show that the corresponding non-Gaussian amplitudes from the cubic Weyl term with a non-dynamical coupling are much smaller than those from the conventional slow-roll inflation, in spite of the fact that there is no slow-roll suppression. We then introduce a dynamical coupling that can boost the magnitude of graviton cubic interactions and clarify that there is a parameter region where the tensor non-Gaussianities can be enhanced and can potentially be tested by cosmic microwave background experiments.

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Probing cosmic inflation with theLiteBIRDcosmic microwave background polarization survey

Allys

Arnold

Aumont

et al. 2022

Progress of Theoretical and Experimental Physics

140

108

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LiteBIRD the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and fundamental physics. The Japan Aerospace Exploration Agency (JAXA) selected LiteBIRD in May 2019 as a strategic large-class (L-class) mission, with an expected launch in the late 2020s using JAXA’s H3 rocket. LiteBIRD is planned to orbit the Sun-Earth Lagrangian point L2, where it will map the cosmic microwave background (CMB) polarization over the entire sky for three years, with three telescopes in 15 frequency bands between 34 and 448 GHz, to achieve an unprecedented total sensitivity of 2.2 μK-arcmin, with a typical angular resolution of 0.5○ at 100 GHz. The primary scientific objective of LiteBIRD is to search for the signal from cosmic inflation, either making a discovery or ruling out well-motivated inflationary models. The measurements of LiteBIRD will also provide us with insight into the quantum nature of gravity and other new physics beyond the standard models of particle physics and cosmology. We provide an overview of the LiteBIRD project, including scientific objectives, mission and system requirements, operation concept, spacecraft and payload module design, expected scientific outcomes, potential design extensions and synergies with other projects. Subject Index LiteBIRD cosmic inflation, cosmic microwave background, B-mode polarization, primordial gravitational waves, quantum gravity, space telescope

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Cosmic Birefringence from Planck Data Release 4

Cited by 6 publications

References 67 publications

Frequency-Dependent Constraints on Cosmic Birefringence from the LFI and HFI Planck Data Release 4

Frequency-Dependent Constraints on Cosmic Birefringence from the LFI and HFI Planck Data Release 4

Parity violation in primordial tensor non-Gaussianities from matter bounce cosmology

Probing cosmic inflation with theLiteBIRDcosmic microwave background polarization survey

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