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The SFB 676 has been funded by the DFG from 2006 to 2018. The project was completed with a special colloquium in June 2018. A book with the scientific results of the SFB 676 has been published in September 2018.

J. Haller and M. Grefe (eds.), “Particles, Strings and the Early Universe: The Structure of Matter and Space-Time,” Hamburg (2018), DOI: 10.3204/PUBDB-2018-00782.

Many research directions developed within the SFB 676 will be continued within the Cluster of Excellence "Quantum Universe" starting 1 January 2019.

C9 – Cosmic Magnetic Fields and their role in High Energy Physics

Project Leaders

Robi Banerjee (e-mail | group homepage)

Günter Sigl (e-mail | group homepage)


Magnetic fields are observed at all astrophysical objects and are most probably present already in the Early Universe. But very little is known about their origin and their development during the cosmic evolution. Within this project we are studying the evolution of primordial and cosmic magnetic fields through the course of the Universe, including the necessary interactions that are relevant during the different evolutionary epochs of the expanding Universe. The aim of this project is to find further constraints on primordial and cosmic magnetic fields and to probe the origin of those fields. The detailed knowledge of cosmic magnetic fields is also important to test axion models and to predict the propagation of high energy cosmic rays.


Andrej Dundović

Peter Niksa

Johannes Reppin

Shadi Sajedi Shacker

Pranjal Trivedi

Former members

Adam Dybulla

Natacha Leite

Jacques Wagstaff


Get these publications as bibtex-file

"Magnetic heating across the cosmological recombination era: Results from 3D MHD simulations"
Trivedi, Pranjal and Reppin, Johannes and Chluba, Jens and Banerjee, Robi
doi: 10.1093/mnras/sty1757
eprint: 1805.05315 [astro-ph.CO]

"Anisotropies of Ultra-high Energy Cosmic Rays Dominated by a Single Source in the Presence of Deflections"
Dundović, Andrej and Sigl, Günter
eprint: 1710.05517 [astro-ph.HE]

"Observation of a Large-scale Anisotropy in the Arrival Directions of Cosmic Rays above 8 × 1018 eV"
Aab, Alexander and others
Science 357, 1266-1270 (2017)
doi: 10.1126/science.aan4338
eprint: 1709.07321 [astro-ph.HE]

"Astrophysical Haloscopes"
Sigl, Guenter
Phys. Rev. D96, 103014 (2017)
doi: 10.1103/PhysRevD.96.103014
eprint: 1708.08908 [astro-ph.HE]

"CRPropa 3.1—a low energy extension based on stochastic differential equations"
Merten, Lukas and Becker Tjus, Julia and Fichtner, Horst and Eichmann, Björn and Sigl, Günter
JCAP 1706, 046 (2017)
doi: 10.1088/1475-7516/2017/06/046
eprint: 1704.07484 [astro-ph.IM]

"Implications of strong intergalactic magnetic fields for ultrahigh-energy cosmic-ray astronomy"
Alves Batista, Rafael and Shin, Min-Su and Devriendt, Julien and Semikoz, Dmitri and Sigl, Günter
Phys. Rev. D96, 023010 (2017)
doi: 10.1103/PhysRevD.96.023010
eprint: 1704.05869 [astro-ph.HE]

"Do Cosmic Rays Heat the Early Intergalactic Medium?"
Leite, Natacha and Evoli, Carmelo and D'Angelo, Marta and Ciardi, Benedetta and Sigl, Günter and Ferrara, Andrea
Mon. Not. Roy. Astron. Soc. 469, 416-424 (2017)
doi: 10.1093/mnras/stx805
eprint: 1703.09337 [astro-ph.CO]

"Propagation of Ultra High Energy Cosmic Rays in Extragalactic Magnetic Fields: A view from cosmological simulations"
Hackstein, Stefan and Vazza, Franco and Brüggen, Marcus and Sigl, Günter and Dundovic, Andrej
Mon. Not. Roy. Astron. Soc. 462, 3660-3671 (2016)
doi: 10.1093/mnras/stw1903
eprint: 1607.08872 [astro-ph.CO]

"Probing Intergalactic Magnetic Fields with Simulations of Electromagnetic Cascades"
Alves Batista, Rafael and Saveliev, Andrey and Sigl, Günter and Vachaspati, Tanmay
Phys. Rev. D94, 083005 (2016)
doi: 10.1103/PhysRevD.94.083005
eprint: 1607.00320 [astro-ph.HE]

"Synchrotron Emission from Dark Matter in Galactic Subhalos. A Look into the Smith Cloud"
Leite, Natacha and Reuben, Robin and Sigl, Günter and Tytgat, Michel H. G. and Vollmann, Martin
JCAP 1611, 021 (2016)
doi: 10.1088/1475-7516/2016/11/021
eprint: 1606.03515 [astro-ph.GA]

"CRPropa 3—a Public Astrophysical Simulation Framework for Propagating Extraterrestrial Ultra-High Energy Particles"
Alves Batista, Rafael and Dundovic, Andrej and Erdmann, Martin and Kampert, Karl-Heinz and Kuempel, Daniel and Müller, Gero and Sigl, Günter and van Vliet, Arjen and Walz, David and Winchen, Tobias
JCAP 1605, 038 (2016)
doi: 10.1088/1475-7516/2016/05/038
eprint: 1603.07142 [astro-ph.IM]

"Chiral Magnetic Effect in Protoneutron Stars and Magnetic Field Spectral Evolution"
Sigl, Günter and Leite, Natacha
JCAP 1601, 025 (2016)
doi: 10.1088/1475-7516/2016/01/025
eprint: 1507.04983 [astro-ph.HE]

"Constraining ALP-photon coupling using galaxy clusters"
Schlederer, Martin and Sigl, Günter
JCAP 1601, 038 (2016)
doi: 10.1088/1475-7516/2016/01/038
eprint: 1507.02855 [hep-ph]

"Extragalactic magnetic fields unlikely generated at the electroweak phase transition"
Wagstaff, Jacques M. and Banerjee, Robi
JCAP 1601, 002 (2016)
doi: 10.1088/1475-7516/2016/01/002
eprint: 1409.4223 [astro-ph.CO]

"Diffusion of cosmic rays at EeV energies in inhomogeneous extragalactic magnetic fields"
Alves Batista, Rafael and Sigl, Günter
JCAP 1411, 031 (2014)
doi: 10.1088/1475-7516/2014/11/031
eprint: 1407.6150 [astro-ph.HE]

"Magnetic field amplification by the small-scale dynamo in the early Universe"
Wagstaff, Jacques M. and Banerjee, Robi and Schleicher, Dominik and Sigl, Günter
Phys. Rev. D89, 103001 (2014)
doi: 10.1103/PhysRevD.89.103001
eprint: 1304.4723 [astro-ph.CO]

"CRPropa 2.0 – a Public Framework for Propagating High Energy Nuclei, Secondary Gamma Rays and Neutrinos"
Kampert, Karl-Heinz and Kulbartz, Jörg and Maccione, Luca and Nierstenhoefer, Nils and Schiffer, Peter and others
Astropart.Phys. 42, 41-51 (2013)
doi: 10.1016/j.astropartphys.2012.12.001
eprint: 1206.3132 [astro-ph.IM]


PhD thesis: "The effect of dynamical speed of light theories in Palatini formalism on the cosmic evolution"
Shadi Sajedi Shacker
Universität Hamburg (2018)
[ link ]

PhD thesis: "On Anisotropies of Ultra-high Energy Cosmic Rays"
Andrej Dundović
Universität Hamburg (2018)
[ link ]

PhD thesis: "On the Connection Between Particle Physics and Properties of Cosmic Magnetic Fields"
Violante Gomes Leite, Natacha
Universität Hamburg (2017)
[ link ]

Impressum  | last modified 17 Sep 2018