Constraints on primordial magnetic fields from their impact on the ionization history with Planck 2018

Paoletti, D.; Chluba, Jens; Finelli⋆, F.; Rubiño-Martín, J. A.

doi:10.1093/mnras/stac2947

Cited by 10 publications

(10 citation statements)

References 114 publications

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“…This is reflected in the constraints we obtain and shown in table 6 and in two-dimensional contours in figure 15. With respect to current constraints from Planck data (in parentheses in the table) [181], we find that with LiteBIRD sensitivities we are capable of improving the constraints for negative n B . This is due to the shape of the MHD decaying turbulence effect.…”

Section: Magneto-hydrodynamics Decaying Turbulencementioning

confidence: 83%

“…We use the extension developed and optimized in refs. [178,180,181], with the same settings as in ref. [181], of the Recfast++ routine within the CosmoRec code [226].…”

Section: Jcap07(2024)086mentioning

confidence: 99%

“…[178,180,181], with the same settings as in ref. [181], of the Recfast++ routine within the CosmoRec code [226]. Our treatment is based on analytical approximations for MHD decaying turbulence and ambipolar diffusion.…”

Section: Jcap07(2024)086mentioning

confidence: 99%

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LiteBIRD science goals and forecasts: primordial magnetic fields

Paoletti,

Rubino-Martin,

Shiraishi

et al. 2024

J. Cosmol. Astropart. Phys.

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We present detailed forecasts for the constraints on the characteristics of primordial magnetic fields (PMFs) generated prior to recombination that will be obtained with the LiteBIRD satellite. The constraints are driven by some of the main physical effects of PMFs on the CMB anisotropies: the gravitational effects of magnetically-induced perturbations; the effects on the thermal and ionization history of the Universe; the Faraday rotation imprint on the CMB polarization spectra; and the non-Gaussianities induced in polarization anisotropies. LiteBIRD represents a sensitive probe for PMFs. We explore different levels of complexity, for LiteBIRD data and PMF configurations, accounting for possible degeneracies with primordial gravitational waves from inflation. By exploiting all the physical effects, LiteBIRD will be able to improve the current limit on PMFs at intermediate and large scales coming from Planck. In particular, thanks to its accurate B-mode polarization measurement, LiteBIRD will improve the constraints on infrared configurations for the gravitational effect, giving B n B=-2.9 1 Mpc< 0.8 nG at 95% C.L., potentially opening the possibility to detect nanogauss fields with high significance. We also observe a significant improvement in the limits when marginalized over the spectral index, B n Bmarg 1 Mpc< 2.2 nG at 95 % C.L. From the thermal history effect, which relies mainly on E-mode polarization data, we obtain a significant improvement for all PMF configurations, with the marginalized case, √⟨B 2⟩marg<0.50 nG at 95 % C.L. Faraday rotation constraints will take advantage of the wide frequency coverage of LiteBIRD and the high sensitivity in B modes, improving the limits by orders of magnitude with respect to current results, B n B=-2.9 1 Mpc < 3.2 nG at 95 % C.L. Finally, non-Gaussianities of the B-mode polarization can probe PMFs at the level of 1 nG, again significantly improving the current bounds from Planck. Altogether our forecasts represent a broad collection of complementary probes based on widely tested methodologies, providing conservative limits on PMF characteristics that will be achieved with the LiteBIRD satellite.

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Section: Magneto-hydrodynamics Decaying Turbulencementioning

confidence: 83%

“…We use the extension developed and optimized in refs. [178,180,181], with the same settings as in ref. [181], of the Recfast++ routine within the CosmoRec code [226].…”

Section: Jcap07(2024)086mentioning

confidence: 99%

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LiteBIRD science goals and forecasts: primordial magnetic fields

Paoletti,

Rubino-Martin,

Shiraishi

et al. 2024

J. Cosmol. Astropart. Phys.

Self Cite

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“…The leading constraint on this parameter is B 1Mpc 1.2 nG for a nearly scale-invariant PMF, derived from a combination of Planck and SPT two-point power spectra (Zucca et al 2017). Through the effect of PMFs on the postrecombination ionization history, Paoletti et al (2022) were able to constrain the amplitude of the magnetic fields to < B 0.69 nG 2 . The A CB constraint derived from BICEP3 95 GHz alone (A CB 0.097) is comparable to the upper limits from SPT and ACT, but the resulting constraint on B 1Mpc is considerably better because of the advantage of the lower-frequency leverage with the ν −2 scaling.…”

Section: Constraints On Pmfsmentioning

confidence: 99%

BICEP/Keck. XVII. Line-of-sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors

Collaboration¹,

Ade³

et al. 2023

ApJ

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We present estimates of line-of-sight distortion fields derived from the 95 and 150 GHz data taken by BICEP2, BICEP3, and the Keck Array up to the 2018 observing season, leading to cosmological constraints and a study of instrumental and astrophysical systematics. Cosmological constraints are derived from three of the distortion fields concerning gravitational lensing from large-scale structure, polarization rotation from magnetic fields or an axion-like field, and the screening effect of patchy reionization. We measure an amplitude of the lensing power spectrum A L ϕ ϕ = 0.95 ± 0.20 . We constrain polarization rotation, expressed as the coupling constant of a Chern–Simons electromagnetic term g a γ ≤ 2.6 × 10−2/H I , where H I is the inflationary Hubble parameter, and an amplitude of primordial magnetic fields smoothed over 1 Mpc B 1Mpc ≤ 6.6 nG at 95 GHz. We constrain the rms of optical depth fluctuations in a simple “crinkly surface” model of patchy reionization, finding A τ < 0.19 (2σ) for the coherence scale of L c = 100. We show that all of the distortion fields of the 95 and 150 GHz polarization maps are consistent with simulations including lensed ΛCDM, dust, and noise, with no evidence for instrumental systematics. In some cases, the EB and TB quadratic estimators presented here are more sensitive than our previous map-based null tests at identifying and rejecting spurious B-modes that might arise from instrumental effects. Finally, we verify that the standard deprojection filtering in the BICEP/Keck data processing is effective at removing temperature to polarization leakage.

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“…Magnetic fields exist in various scales of the Universe, from planets, stars, and galaxies [1,2], to clusters of galaxies [3] and remote protogalactic clouds. The absence of blazar halos implies magnetic fields with a magnitude B > 10 −16 G on Mpc to Gpc scales or B > 10 −15 G on kpc scales [4], while the anisotropy and polarization of the cosmic microwave background imposes an upper bound of ∼ 10 −9 G on Mpc scales [5,6].…”

Section: Introductionmentioning

confidence: 99%

Anisotropic gravitational waves induced by hypermagnetic fields during the electroweak phase transition epoch

Li¹,

Yan²,

Huang³

2022

Preprint

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We study the anisotropies of gravitational waves induced by weak hypermagnetic fields which are randomly distributed and oriented during the electroweak phase transition in the early universe. The theory setup of this study is the standard model plus a real singlet scalar field, which can produce the needed strongly first order electroweak phase transition. Then we investigate how the hypermagnetic fields can convert to magnetic fields and we compute the departure of energy difference between the symmetric phase and the broken phase when the magnetic fields are turned on. It is found that the presence of the hypermagnetic fields can increase the Euclidean action, thus can decrease nucleation temperature, which can lead to a supercool plasma. We point out that the hypermagnetic field can enhance the gravitational wave production from a first order electroweak phase transition and the inhomogeneity of primordial hypermagnetic field can lead to anisotropies of gravitational waves. By examining three well-motivated distribution of hypermagnetic fields, we calculate the corresponding angular power spectra of stochastic gravitational wave background and find they can be significantly larger than the contributions of the Sachs-Wolfe effects and integrated Sachs-Wolfe effects. Our results show that the anisotropies of gravitational wave could provide a novel probe to the primordial hypermagnetic field in the electroweak phase transition epoch.

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Constraints on primordial magnetic fields from their impact on the ionization history with Planck 2018

Cited by 10 publications

References 114 publications

LiteBIRD science goals and forecasts: primordial magnetic fields

LiteBIRD science goals and forecasts: primordial magnetic fields

BICEP/Keck. XVII. Line-of-sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors

Anisotropic gravitational waves induced by hypermagnetic fields during the electroweak phase transition epoch

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