Cosmology and the massive photon frequency shift in the Standard-Model Extension

Spallicci, A.; Helayël-Neto, J. A.; López-Corredoira, Martín; Capozziello, Salvatore

doi:10.1140/epjc/s10052-020-08703-3

Cited by 30 publications

(26 citation statements)

References 85 publications

(146 reference statements)

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“…If true, this would have crucial implications on the standard model of cosmology. Recently, several theoretical frameworks that accumulate such anisotropies were developed (e.g., D ąbrowski & Wagner 2020; Paliathanasis & Leon 2020; Das et al 2021;Spallicci et al 2021). On the other hand, results that do not show any strong evidence for departure for statistical isotropy have also been presented (e.g., Andrade et al 2019;Bengaly et al 2019).…”

Section: Anisotropic Hubble Expansionmentioning

confidence: 99%

Cosmological implications of the anisotropy of ten galaxy cluster scaling relations

Migkas

Pacaud

Schellenberger

et al. 2021

A&A

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The hypothesis that the late Universe is isotropic and homogeneous is adopted by most cosmological studies, including studies of galaxy clusters. The cosmic expansion rate H0 is thought to be spatially constant, while bulk flows are often presumed to be negligible compared to the Hubble expansion, even at local scales. The effects of bulk flows on the redshift–distance conversion are hence usually ignored. Any deviation from this consensus can strongly bias the results of such studies, and thus the importance of testing these assumptions cannot be understated. Scaling relations of galaxy clusters can be effectively used for this testing. In previous works, we observed strong anisotropies in cluster scaling relations, whose origins remain ambiguous. By measuring many different cluster properties, several scaling relations with different sensitivities can be built. Nearly independent tests of cosmic isotropy and large bulk flows are then feasible. In this work, we make use of up to 570 clusters with measured properties at X-ray, microwave, and infrared wavelengths to construct ten different cluster scaling relations and test the isotropy of the local Universe; to our knowedge, we present five of these scaling relations for the first time. Through rigorous and robust tests, we ensure that our analysis is not prone to generally known systematic biases and X-ray absorption issues. By combining all available information, we detect an apparent 9% spatial variation in the local H0 between (l, b)∼(280°−35°+35°, −15°−20°+20°) and the rest of the sky. The observed anisotropy has a nearly dipole form. Using isotropic Monte Carlo simulations, we assess the statistical significance of the anisotropy to be > 5σ. This result could also be attributed to a ∼900 km s−1 bulk flow, which seems to extend out to at least ∼500 Mpc. These two effects will be indistinguishable until more high-z clusters are observed by future all-sky surveys such as eROSITA.

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Section: Anisotropic Hubble Expansionmentioning

confidence: 99%

Cosmological implications of the anisotropy of ten galaxy cluster scaling relations

Migkas

Pacaud

Schellenberger

et al. 2021

A&A

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“…Indeed, if a field is constant, its associated potential is not. For M = m γ c/ , being m γ the photon mass, = 1.055 × 10 −34 kg m 2 s −1 , the energy-momentum density tensor variation becomes [74]…”

Section: B De Broglie-proca Theorymentioning

confidence: 99%

Investigating dark energy by electromagnetic frequency shifts

Spallicci,

Sarracino,

Capozziello

2022

Preprint

Self Cite

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The observed red shift z might be composed by the expansion red shift z C and an additional frequency shift z S , towards the red or the blue, by considering Extended Theories of Electromagnetism (ETE). Indeed, massive photon theories -the photon has a real mass as in the de Broglie-Proca theory or an effective mass as in the Standard-Model Extension (SME), based on Lorentz-Poincaré Symmetry Violation (LSV) -or Non-Linear Electro-Magnetism (NLEM) theories may induce a cosmological expansion independent frequency shift in presence of background (inter-) galactic electromagnetic fields, and where of relevance LSV fields, even when both fields are constant. We have tested this prediction considering the Pantheon Catalogue, composed by 1048 SNe Ia, and 15 BAO data, for different cosmological models characterised by the absence of a cosmological constant. From the data, we compute which values of z S match the observations, spanning cosmological parameters (Ω densities and Hubble-Lemaître constant) domains. We conclude that the frequency shift z S can support an alternative to accelerated expansion, naturally accommodating each SN Ia position in the distance-modulus versus red shift diagram, due to the light-path dependency of z S . Finally, we briefly mention laboratory test approaches to investigate the additional shift from ETE predictions.

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“…Equations ( 32) and (33) give the negative energy solutions for the anti-fermions while equations ( 34) and (35) give the positive energy solutions for fermions. Accordingly, by equating vector coefficient (e j ) in equation ( 29) the momentum like solutions for Dirac rotating particles can be expressed as…”

Section: Quaternionic Minkowski Space-timementioning

confidence: 99%

Generalized quaternionic free rotational Dirac equation and spinor solutions in the electromagnetic field

Bhatt,

Chanyal

2022

Preprint

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Starting with the quaternionic Minkowski space-time and its four-vector representation, a rotational analogue of the quaternionic Dirac equation in the electromagnetic field is developed, which includes not only the energy solutions but also the angular momentum solutions for rotating Dirac fermions. The striking feature of the quaternionic approach is that it depicts a unified representation of energy-momentum in a single framework as the space-time. Furthermore, we establish the generalized Schrodinger-Pauli-like equation associated with generalized electric and magnetic dipole energies that corresponding to their dipole moments. As such, the present analysis deals with the invariant behavior of the extended quaternionic rotational Dirac equation under Lorentz-Poincaré, Gauge, duality, and CPT invariance.

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Cosmology and the massive photon frequency shift in the Standard-Model Extension

Cited by 30 publications

References 85 publications

Cosmological implications of the anisotropy of ten galaxy cluster scaling relations

Cosmological implications of the anisotropy of ten galaxy cluster scaling relations

Investigating dark energy by electromagnetic frequency shifts

Generalized quaternionic free rotational Dirac equation and spinor solutions in the electromagnetic field

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