Magnetically assisted primordial scalar perturbations: Scalar-Induced Gravitational Waves

arXiv:2607.17875 · astro-ph.CO, gr-qc, hep-ph · Submitted 2026-07-20 · Read on arXiv

Arko Bhaumik, Theodoros Papanikolaou, Anish Ghoshal

astro-ph.CO, gr-qc, hep-ph

Submitted: 2026-07-20

Comments: 29 pages plus appendices (total 37 pages), 4 figures, 4 tables

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Reheating — 40× in this paper · explained in 2 episodes
• Primordial Magnetic Fields — 24× in this paper · explained in 2 episodes
• Benchmark — 21× in this paper · explained in 2 episodes
• Abundance — 15× in this paper · explained in 1 episode
• Decoupling — 7× in this paper · explained in 2 episodes
• Consistency — 6× in this paper · explained in 3 episodes
• Standard Model — 3× in this paper
• Trace — 3× in this paper · explained in 2 episodes
• Matter Power Spectrum — 2× in this paper · explained in 2 episodes
• Signal-to-noise ratio (SNR) — 2× in this paper · explained in 2 episodes
• 21 cm Line Signal — 1× in this paper · explained in 1 episode
• 21-cm signal — 1× in this paper · explained in 1 episode
• Adiabatic Evolution — 1× in this paper · explained in 2 episodes
• Anisotropy — 1× in this paper · explained in 3 episodes
• Degeneracy — 1× in this paper · explained in 3 episodes
• Fine-Tuning — 1× in this paper · explained in 5 episodes
• Frequency Dependence — 1× in this paper · explained in 2 episodes
• Generalization — 1× in this paper · explained in 13 episodes
• Higher-order statistics — 1× in this paper · explained in 2 episodes
• Hubble Tension — 1× in this paper · explained in 9 episodes
• Phase Transitions — 1× in this paper · explained in 2 episodes
• pulsar timing arrays — 1× in this paper · explained in 2 episodes

Sources

• Modeling the Magnetic Field in the Galactic Disk using New Rotation Measure Observations from the Very Large Array
• The intergalactic magnetic field probed by a giant radio galaxy
• Lower limit on the strength and filling factor of extragalactic magnetic fields
• Cosmological Magnetic Fields: Their Generation, Evolution and Observation
• The origin, evolution and signatures of primordial magnetic fields
• Constraining Primordial Magnetism
• Massive Neutrinos and Magnetic Fields in the Early Universe
• Constraining primordial magnetic fields with distortions of the black-body spectrum of the cosmic microwave background: pre- and post-decoupling contributions
• Inflationary Magnetogenesis without the Strong Coupling Problem II: Constraints from CMB anisotropies and B-modes
• Planck 2015 results. XIX. Constraints on primordial magnetic fields
• Constraints on the Intergalactic Magnetic Field from Bow Ties in the Gamma-ray Sky
• Constraints on Primordial Magnetic Fields from Planck combined with the South Pole Telescope CMB B-mode polarization measurements
• Relieving the Hubble tension with primordial magnetic fields
• Constraining primordial magnetic fields through large scale structure
• Magnetic field back reaction on the matter power spectrum
• Primordial Density Perturbations from Magnetic Fields
• Matter power spectrum induced by primordial magnetic fields: from the linear to the non-linear regime
• Influence of primordial magnetic fields on 21 cm emission
• 21 cm line signal from magnetic modes
• Insight into primordial magnetic fields from 21-cm line observation with EDGES experiment

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