Introducing SPHINX-MHD: the impact of primordial magnetic fields on the first galaxies, reionization, and the global 21-cm signal

  title={Introducing SPHINX-MHD: the impact of primordial magnetic fields on the first galaxies, reionization, and the global 21-cm signal},
  author={Harley Katz and Sergio Martin-Alvarez and Joakim Rosdahl and Taysun Kimm and J{\'e}r{\'e}my Blaizot and Martin G. Haehnelt and L'eo Michel-Dansac and Thibault Garel and Jos{\'e} O{\~n}orbe and Julien Devriendt and Adrianne D. Slyz and Omar Attia and R. Teyssier},
We present the first results from SPHINX-MHD, a suite of cosmological radiation-magnetohydrodynamics simulations designed to study the impact of primordial magnetic fields (PMFs) on galaxy formation and the evolution of the intergalactic medium (IGM) during the epoch of reionization. The simulations are among the first to employ multi-frequency, on-the-fly radiation transfer and constrained transport ideal MHD in a cosmological context to simultaneously model the inhomogeneous process of… 
Evolution of Primordial Magnetic Fields during Large-scale Structure Formation
Primordial magnetic fields (PMFs) could explain the large-scale magnetic fields present in the universe. Inflation and phase transitions in the early universe could give rise to such fields with
Reionization with Simba: How Much Does Astrophysics Matter in Modeling Cosmic Reionization?
Traditional large-scale models of reionization usually employ simple deterministic relations between halo mass and luminosity to predict how reionization proceeds. We here examine the impact on
Effect of Magnetic Field Dissipation on Primordial Li Abundance
The dissipation effects of primordial magnetic fields on the primordial elemental abundances were investigated. When a magnetic field reconnects, its energy is converted to the kinetic energy of
AMBER: A Semi-numerical Abundance Matching Box for the Epoch of Reionization
The Abundance Matching Box for the Epoch of Reionization (AMBER) is a semi-numerical code for modeling the cosmic dawn. The new algorithm is not based on the excursion set formalism for reionization,
Distribution function of nuclei from e± scattering in the presence of a strong primordial magnetic field
The amplitude of the primordial magnetic field (PMF) is constrained from observational limits on primordial nuclear abundances. Within this constraint, it is possible that nuclear motion is regulated
Probing isocurvature perturbations with 21-cm global signal in the light of HERA result
We argue that the 21-cm global signal can be a powerful probe of isocurvature perturbations, particularly for the ones with blue-tilted spectra. Although the 21-cm global signal is much affected by
Gravitational waves from the remnants of the first stars in nuclear star clusters
We study Population III (Pop III) binary remnant mergers in nuclear star clusters (NSCs) with a semi-analytical approach for early structure formation. Within this framework, we keep track of the


Primordial magnetic fields and the HI signal from the epoch of reionization
The implication of primordial magnetic-field-induced structure formation for the HI signal from the epoch of reionization is studied. Using semi-analytic models, we compute both the density and
Generation of the Primordial Magnetic Fields during Cosmological Reionization
We investigate the generation of magnetic fields by the Biermann battery in cosmological ionization fronts, using new simulations of the reionization of the universe by stars in protogalaxies. Two
An MHD gadget for cosmological simulations
Various radio observations have shown that the hot atmospheres of galaxy clusters are magnetized. However, our understanding of the origin of these magnetic fields, their implications on structure
Ly α as a tracer of cosmic reionization in the SPHINX radiation-hydrodynamics cosmological simulation
The Lyα emission line is one of the most promising probes of cosmic reionisation but isolating the signature of a change in the ionisation state of the IGM is challenging because of intrinsic
Cosmological MHD simulation of a cooling flow cluster
Context. Various observations of magnetic fields in the intra-cluster medium (ICM), most of the time restricted to cluster cores, point towards a field strength of a few µG (synchrotron radiation
Magnetic fields in the early universe can significantly alter the thermal evolution and the ionization history during the dark ages. This is reflected in the 21 cm line of atomic hydrogen, which is
Strong magnetic fields and large rotation measures in protogalaxies from supernova seeding
We present a model for the seeding and evolution of magnetic fi elds in protogalaxies. Super- nova (SN) explosions during the assembly of a protogalaxy self-consistently provide magnetic seed fields,
Resolved magnetic dynamo action in the simulated intracluster medium
Faraday rotation and synchrotron emission from extragalactic radio sources give evidence for the presence of magnetic fields extending over ˜ Mpc scales. However, the origin of these fields remains
Magnetogenesis around the first galaxies: the impact of different field seeding processes on galaxy formation
We study the evolution of magnetic fields generated by charge segregation ahead of ionization fronts during the Epoch of Reionization, and their effects on galaxy formation. We compare this magnetic
Magnetic reheating
We provide a new bound on the amplitude of primordial magnetic fields (PMFs) by using a novel mechanism, named {\it magnetic reheating}. Before the epoch of recombination, PMFs induce the fluid