Constraining Primordial Magnetic Fields Through Large-Scale Structure

Kahniashvili, Tina; Maravin, Y.; Natarajan, Aravind; Battaglia, Nicholas; Tevzadze, Alexander G.

doi:10.1088/0004-637x/770/1/47

Cited by 55 publications

(65 citation statements)

References 65 publications

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“…(3): such CMB constraint is 30 times tighter than the one derived from Big Bang Nucleosythesis, i.e. B 2 < 840 nG [46]. Another possible definition for the amplitude of the stochastic background of PMF which takes into account the damping scale in Eq.…”

Section: Resultsmentioning

confidence: 99%

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Constraints on a stochastic background of primordial magnetic fields with WMAP and South Pole Telescope data

Paoletti

Finelli⋆

2013

Physics Letters B

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We constrain a stochastic background of primordial magnetic fields (PMF) by its contribution to the cosmic microwave background (CMB) anisotropy angular power spectrum with the combination of WMAP 7 year and South Pole Telescope (SPT) data. The contamination in the SPT data by unresolved point sources and by the Sunyaev Zeldovich (SZ) effect due to galaxy clusters has been taken into account as modelled by the SPT collaboration. With this combination of WMAP 7 yr and SPT data, we constrain the amplitude Gaussian smoothed over 1 Mpc scale of a stochastic background of non-helical PMF to B1Mpc < 3.5 nG at 95% confidence level, improving on previous bounds. Our analysis shows that SPT data up to ℓ = 3000 bring an improvement of almost a factor two with respect to results with previous CMB high-ℓ data. We then discuss the forecasted impact from unresolved points sources and SZ effect for Planck capabilities in constraining PMF.

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Section: Resultsmentioning

confidence: 99%

“…has also been used as an effective amplitude to be compared with observations [45,46]. This alternative definition is a non-local quantity, strongly dependent on the damping scale and unrelated to local astrophysical measurements, but useful in the context of nucleosynthesis [47].…”

Section: Resultsmentioning

confidence: 99%

Constraints on a stochastic background of primordial magnetic fields with WMAP and South Pole Telescope data

Paoletti

Finelli⋆

2013

Physics Letters B

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“…Planck data limits the magnetic field strength smoothed over 1 Mpc to B 1Mpc < 4.4 nano Gauss (nG) at the 95% confidence level [41,42]. Comparable bounds are obtained from Lyman-α spectra [43]. The next-generation of CMB polarization experiments promise order of magnitude improvements with the ability to detect sub-nG PMFs [44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

POLARBEAR constraints on cosmic birefringence and primordial magnetic fields

Ade¹,

Arnold²,

Atlas³

et al. 2015

Phys. Rev. D

100

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We constrain anisotropic cosmic birefringence using four-point correlations of even-parity E-mode and odd-parity B-mode polarization in the cosmic microwave background measurements made by the Polarbear experiment in its first season of observations. We find that the anisotropic cosmic 2 birefringence signal from any parity violating processes is consistent with zero. The Faraday rotation from anisotropic cosmic birefringence can be compared with the equivalent quantity generated by primordial magnetic fields if they existed. The Polarbear non-detection translates into a 95% confidence level (C.L.) upper limit of 93 nano-Gauss (nG) on the amplitude of an equivalent primordial magnetic field inclusive of systematic uncertainties. This four-point correlation constraint on Faraday rotation is about 15 times tighter than the upper limit of 1380 nG inferred from constraining the contribution of Faraday rotation to two-point correlations of B-modes measured by Planck in 2015. Metric perturbations sourced by primordial magnetic fields would also contribute to the B-mode power spectrum. Using the Polarbear measurements of the B-mode power spectrum (two-point correlation), we set a 95% C.L. upper limit of 3.9 nG on primordial magnetic fields assuming a flat prior on the field amplitude. This limit is comparable to what was found in the Planck 2015 two-point correlation analysis with both temperature and polarization. We perform a set of systematic error tests and find no evidence for contamination. This work marks the first time that anisotropic cosmic birefringence or primordial magnetic fields have been constrained from the ground at sub-degree scales.

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“…(2). Indeed, the most significant limits on large-scale cosmic magnetic fields come from big bang nucleosynthesis analyses, B 0 1 × 10 −6 G [ [85][86][87], data on large-scale structures, B 0 few × 10 −9 G [87,88], studies of CMB radiation, B 0 few×10 −9 G [87, [89][90][91][92][93], studies of the ionization history of our Universe, B 0 10 −9 G [94], Faraday rotation maps of distant quasars, B 0 10 −11 G [95,96], and blazar observations, B 0 7 × 10 −14 G [97][98][99], where the last lower limit refers to the less conservative bound from the blazar 1ES 0229+200 [99]. It is interesting to observe that the upper limit from Faraday rotation maps and the lower limit from blazar observations are a just few times outside the interval of B 0 in Eq.…”

Section: Seed Magnetic Fieldsmentioning

confidence: 99%

Lorentz-violating inflationary magnetogenesis

Campanelli

2015

Eur. Phys. J. C

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A non-conformally invariant coupling between the inflaton and the photon in the minimal Lorentz-violating standard model extension is analyzed. For specific forms of the Lorentz-violating background tensor, the strongcoupling and back-reaction problems of magnetogenesis in de Sitter inflation with scale ∼10 16 GeV are evaded, the electromagnetic-induced primordial spectra of (Gaussian and non-Gaussian) scalar and tensor curvature perturbations are compatible with cosmic microwave background observations, and the inflation-produced magnetic field directly accounts for cosmic magnetic fields.

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Constraining Primordial Magnetic Fields Through Large-Scale Structure

Cited by 55 publications

References 65 publications

Constraints on a stochastic background of primordial magnetic fields with WMAP and South Pole Telescope data

Constraints on a stochastic background of primordial magnetic fields with WMAP and South Pole Telescope data

POLARBEAR constraints on cosmic birefringence and primordial magnetic fields

Lorentz-violating inflationary magnetogenesis

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