Progress in the Global Modeling of the Galactic Magnetic Field

Unger, Michael; Farrar, Glennys R.

doi:10.1051/epjconf/201921004005

Cited by 24 publications

(17 citation statements)

References 30 publications

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“…Concretely, using recent estimates, deflections of cosmic rays by the regular GMF are expected to range from ∼ 15 to ∼ 40 × 10 EeV E/Z degrees depending on the direction [949,950]; root-mean-square deflections by the turbulent GMF are a few times smaller, ranging from 3.5 (most likely ∼ 0.5) ×…”

Section: Effects Of Magnetic Fieldsmentioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

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The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experimental data that is obtained by the detection of the various cosmic messengers (photons, neutrinos, cosmic rays and gravitational waves) from numerous origins. They give us information about their sources in the universe and the properties of the intergalactic medium. Moreover, multi-messenger astronomy opens up the possibility to search for phenomenological signatures of quantum gravity. On the one hand, the most energetic events allow us to test our physical theories at energy regimes which are not directly accessible in accelerators; on the other hand, tiny effects in the propagation of very high energy particles could be amplified by cosmological distances. After decades of merely theoretical investigations, the possibility of obtaining phenomenological indications of Planck-scale effects is a revolutionary step in the quest for a quantum theory of gravity, but it requires cooperation between different communities of physicists (both theoretical and experimental). This review, prepared within the COST Action CA18108 "Quantum gravity phenomenology in the multi-messenger approach", is aimed at promoting this cooperation by giving a state-of-the art account of the interdisciplinary expertise that is needed in the effective search of quantum gravity footprints in the production, propagation and detection of cosmic messengers.

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Section: Effects Of Magnetic Fieldsmentioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The regular Galactic magnetic field component is still quite uncertain, with different existing models leading to different predictions for the deflections (see e.g. [20,21,22,23,24]. These can be in the ballpark of 10 • to 30 • for 10 EeV protons and depend on the direction considered.…”

Section: Effects Of Galactic Magnetic Field Deflectionsmentioning

confidence: 99%

Anisotropies of ultrahigh-energy cosmic rays in a scenario with nearby sources

Mollerach,

Roulet

2021

Preprint

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The images of ultrahigh-energy cosmic ray sources get distorted, in an energy dependent way, by the effects of Galactic and extragalactic magnetic fields. These deflections can also affect the observed cosmic ray spectrum, specially when the sources are transient. We study scenarios in which one or a few nearby extragalactic sources, such as Cen A or M81/M82, provide the dominant contribution to the cosmic ray flux above the ankle of the spectrum. We discuss the effects of the angular dispersion induced by the turbulent extragalactic magnetic fields, and the coherent deflections caused by the regular Galactic magnetic field, with the associated multiple imaging of the sources. We consider the possible contribution from those sources to the dipolar distribution discovered by the Pierre Auger Observatory above 8 EeV, as well as to the hot spots hinted in the observations by the Pierre Auger and Telescope Array observatories at higher energies, taking into account the mixed nature of the cosmic ray composition.

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“…We know magnetic fields exist on galaxy scales and larger in the Universe, but we do not know how they got there, neither we do completely understand their role in how the Universe has evolved. Our observational and theoretical understanding of magnetic fields in the Milky Way and of the global structure of the Galactic magnetic field (GMF) has matured over many decades [1,2], with a new-generation of more sophisticated and quantitatively-constrained models emerging in the last decade [3][4][5][6][7][8][9].…”

Section: General Ideamentioning

confidence: 99%

The Galactic Magnetic Field in the Light of Starburst-generated Ultrahigh-energy Cosmic Rays

Soriano¹,

Anchordoqui²,

Torres³

2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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Auger data show evidence for a correlation between ultrahigh-energy cosmic rays (UHECRs) and nearby starburst galaxies. This intriguing correlation is consistent with data collected by the Telescope Array, which have revealed a much more pronounced directional "hot spot" in arrival directions not far from the starburst galaxy M82. In this work, we assume starbursts are sources of UHECRs and investigate the prospects to use the observed distribution of UHECR arrival directions to constrain Galactic magnetic field models. We show that if the Telescope Array hot spot indeed originates from M82, UHECR data would place a strong constraint on the coherent and turbulent components of the Galactic magnetic field.

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Progress in the Global Modeling of the Galactic Magnetic Field

Cited by 24 publications

References 30 publications

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Anisotropies of ultrahigh-energy cosmic rays in a scenario with nearby sources

The Galactic Magnetic Field in the Light of Starburst-generated Ultrahigh-energy Cosmic Rays

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