Fundamental Physics with the Square Kilometre Array

Abstract

The Square Kilometre Array (SKA) is a planned large radio interferometer designed to operate over a wide range of frequencies, and with an order of magnitude greater sensitivity and survey speed than any current radio telescope. The SKA will address many important topics in astronomy, ranging from planet formation to distant galaxies. However, in this work, we consider the perspective of the SKA as a facility for studying physics. We review four areas in which the SKA is expected to make major contributions to our understanding of fundamental physics: cosmic dawn and reionisation; gravity and gravitational radiation; cosmology and dark energy; and dark matter and astroparticle physics. These discussions demonstrate that the SKA will be a spectacular physics machine, which will provide many new breakthroughs and novel insights on matter, energy and spacetime.

69 pages, PASA, in press

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• Probing primordial non-Gaussianity via iSW measurements with SKA continuum surveys
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• Primordial black holes in the Dark Ages: Observational prospects for future 21cm surveys
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• On the perturbation of the luminosity distance by peculiar motions
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• Testing gravity at large scales with HI intensity mapping
• Parameter estimation with Sandage-Loeb test
• Cosmic shear without shape noise
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• Measuring Changes in the Fundamental Constants with Redshifted Radio Absorption Lines
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• Late reionizations of the Universe and their manifestation in the CMB data
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• Updated galactic radio constraints on Dark Matter
• Detectable Signatures of Cosmic Radiative Feedback
• CMB-Galaxy correlation in Unified Dark Matter Scalar Field Cosmologies
• The cosmological free-free signal from galaxy groups and clusters
• Disformal scalars as dark matter candidates: Branon phenomenology
• The Halo Model of Large Scale Structure for Warm Dark Matter
• Possible Astrophysical Observables of Quantum Gravity Effects near Black Holes
• Effects of primordial black holes quantum gravity decay on galaxy clustering
• Effective cosmological constant induced by stochastic fluctuations of Newton's constant
• Observing Gravitational Radiation with QSO Proper Motions and the SKA
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• Radio observations of the Galactic Centre and the Coma cluster as a probe of light dark matter self-annihilations and decay
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• Stringy Models of Modified Gravity: Space-time defects and Structure Formation
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• Searches for Extra Spatial Dimensions with the CMS Detector at the LHC
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• The Inflaton that Could : Primordial Black Holes and Second Order Gravitational Waves from Tachyonic Instability induced in Higgs-$R^2$ Inflation
• One $\mu$ to rule them all: CMB spectral distortions can probe domain walls, cosmic strings and low scale phase transitions
• Reconnection-powered fast radio transients from coalescing neutron star binaries
• A universal formula for the relativistic correction to the mutual friction coupling time-scale in neutron stars
• Enhancement of gravitational waves at Q-ball decay including non-linear density perturbations
• Multipole expansion for HI intensity mapping experiments: simulations and modelling
• From EMBER to FIRE: predicting high resolution baryon fields from dark matter simulations with Deep Learning
• Learning how to surf: Reconstructing the propagation and origin of gravitational waves with Gaussian Processes
• Neutron stars as extreme laboratories for gravity tests
• Upgraded antennas for pulsar observations in the Argentine Institute of Radio astronomy
• $R^2$ Inflation Revisited and Dark Energy Corrections
• 21-cm observations and warm dark matter models
• Generating enhanced parity-violating gravitational waves during inflation with violation of the null energy condition
• Probing neutrino interactions and dark radiation with gravitational waves
• Pinning down the primordial black hole formation mechanism with gamma-rays and gravitational waves
• Super heavy dark matter origin of the PeV neutrino event: KM3-230213A
• Amplification of the Primordial Gravitational Waves Energy Spectrum by a Kinetic Scalar in $F(R)$ Gravity
• Neutron stars in massive scalar-Gauss-Bonnet gravity: Spherical structure and time-independent perturbations
• Testing gravity with cosmic variance-limited pulsar timing array correlations
• Field-level inference of galaxy intrinsic alignment from the SDSS-III BOSS survey
• Null test for cosmic curvature using Gaussian process
• An Effective Bias Expansion for 21 cm Cosmology in Redshift Space
• Gravitational Wave Signatures from Domain Wall and Strong First-Order Phase Transitions in a Two Complex Scalar extension of the Standard Model
• Astrophysical Observations of a Dark Matter-Baryon Fifth Force
• Eigengalaxies: describing galaxy morphology using principal components in image space
• Cosmology of Supercooled Universe
• Running of the Spectral Index and Inflationary Dynamics of $F(R)$ Gravity
• Amplification of Primordial Gravitational Waves by a Geometrically Driven non-canonical Reheating Era
• Primordial black holes in scalar field inflation coupled to the Gauss-Bonnet term with fractional power-law potentials
• Prospects for Constraining the Yukawa Gravity with Pulsars around Sagittarius A*
• Constraining axion and compact dark matter with interstellar medium heating
• $f(R)$-Gravity Generated Post-inflationary Eras and their Effect on Primordial Gravitational Waves
• Data Compression and Inference in Cosmology with Self-Supervised Machine Learning
• Collapsing domain walls beyond $Z_2$
• Principles of Gravitational-Wave Detection with Pulsar Timing Arrays
• Timing-residual power spectrum of a polarized stochastic gravitational-wave background in pulsar-timing-array observation
• Multi-wavelength detectability of isolated black holes in the Milky Way
• Probing Left-Right Symmetry via Gravitational Waves from Domain Walls
• Probing dark matter interactions with 21cm observations
• Enhanced primordial gravitational waves from a stiff post-inflationary era due to an oscillating inflaton
• A first order dark $SU(2{)}_D$ phase transition with vector dark matter in the light of NANOGrav 12.5 yr data
• Variations in fundamental constants at the cosmic dawn
• Effects of a Pre-inflationary de Sitter Bounce on the Primordial Gravitational Waves in $f(R)$ Gravity Theories
• Optimizing simulation parameters for weak lensing analyses involving non-Gaussian observables
• Toward a direct measurement of the cosmic acceleration: the first preparation with FAST
• Charting the Nanohertz Gravitational Wave Sky with Pulsar Timing Arrays
• Physics Beyond The Standard Model with Circular Polarization in the CMB and CMB-21cm Cross-Correlation
• ${\mathcal{R}}^2$ Quantum Corrected Scalar Field Inflation
• Tomography of flavoured leptogenesis with primordial blue gravitational waves
• Generalized $R^p$-attractor Cosmology in the Jordan and Einstein Frames: New Type of Attractors and Revisiting Standard Jordan Frame $R^p$ Inflation
• Observing relativistic features in large-scale structure surveys -- I: Multipoles of the power spectrum
• Growth of non-linear structures and spherical collapse in the Galileon Ghost Condensate model
• Imprint of PBH domination on gravitational waves generated by cosmic strings
• Inflation from Multiple Pseudo-Scalar Fields: PBH Dark Matter and Gravitational Waves
• Rescaled Einstein-Hilbert Gravity: Inflation and the Swampland Criteria
• Multiwavelength constraints on the unidentified Galactic TeV sources HESS J1427$-$608, HESS J1458$-$608, and new VHE $\gamma$-ray source candidates
• Angular bispectrum and trispectrum of scalar-induced gravitational waves: all contributions from primordial non-Gaussianity $f_{\mathrm{NL}}$ and $g_{\mathrm{NL}}$
• The evolution of cosmic ray electrons in the cosmic web: seeding by AGN, star formation and shocks
• Distinguishing the impact and signature of black holes from different origins in early cosmic history
• Probing the primordial Universe with 21-cm line from cosmic dawn/epoch of reionization
• Cornering Extended Starobinsky Inflation with CMB and SKA
• Probing ultralight scalar, vector and tensor dark matter with pulsar timing arrays
• Simulations of the progenitors of black hole-neutron star gravitational wave sources
• Non-Gaussian CMB and LSS statistics beyond polyspectra
• The HI Bias during the Epoch of Reionization
• Swampland Criteria and Constraints on Inflation in a $f(R,T)$ Gravity Theory
• asevolution: a relativistic N-body implementation of the (a)symmetron
• Walls, bubbles and doom -- the cosmology of HEFT
• $\text{PineTree}$: A generative, fast, and differentiable halo model for wide-field galaxy surveys
• Imprint of Early Dark Energy in Stochastic Gravitational Wave Background
• Probing the vector charge of Sagittarius A* with pulsar timing
• Primordial black holes in non-minimal Gauss-Bonnet inflation in light of the PTA data
• Gravitational waves and primordial black holes from chirality imbalanced QCD first-order phase transition with $\mathcal{P}$ and $\mathcal{C}\mathcal{P}$ violation
• Leptogenesis, Dark Matter and Gravitational Waves from Discrete Symmetry Breaking
• Gamma-ray and Synchrotron Radiation from Dark Matter annihilations in Ultra-faint Dwarf Galaxies
• How are gamma-ray burst radio afterglows populated?
• Probing flavor violation and baryogenesis via primordial gravitational waves
• Fast generation of mock galaxy catalogues with COLA
• Multi-messenger observations of double neutron stars in Galactic disk with gravitational and radio waves
• Parameter-Estimation Biases for Eccentric Supermassive Binary Black Holes in Pulsar Timing Arrays: Biases Caused by Ignored Pulsar Terms
• Multitension strings in high-resolution U(1)$\times$U(1) simulations
• Future prospects for measuring 1PPN parameters using observations of S2 and S62 at the Galactic Center
• Thermal leptogenesis, dark matter, and gravitational waves from an extended canonical seesaw scenario
• BullFrog: Multi-step perturbation theory as a time integrator for cosmological simulations
• Toward a test of Gaussianity of a gravitational wave background
• New limits on the local Lorentz invariance violation of gravity in the Standard-Model Extension with pulsars
• Radio Pulsars as a Laboratory for Strong-field Gravity Tests
• Cosmic No-hair Conjecture and Inflation with an SU(3) Gauge Field
• High accuracy on $H_0$ constraints from gravitational wave lensing events
• A novel probe of graviton dispersion relations at nano-Hertz frequencies
• A decaying neutralino as dark matter and its gamma ray spectrum
• The Virtual Research Environment: towards a comprehensive analysis platform
• Screening vs. gevolution: in chase of a perfect cosmological simulation code
• The Science of Fundamental Catalogs
• Hubble drift in Palatini $f(\mathcal{R})$-theories
• DEMNUni: cross-correlating the nonlinear ISWRS effect with CMB-lensing and galaxies in the presence of massive neutrinos
• Gravitational Waves from Metastable Cosmic Strings in Supersymmetric New Inflation Model
• Unveiling the Universe with Emerging Cosmological Probes
• Revisiting primordial magnetic fields through 21-cm physics: Bounds and forecasts
• Prospects for probing small-scale dark matter models with pulsars around Sagittarius A*
• Supercooled phase transitions in conformal dark sectors explain NANOGrav data
• Can EDGES observation favour any dark matter model?
• Gravitational Wave Signatures of Gauged Baryon and Lepton Number
• A Multi-messenger view of Cosmic Dawn: Conquering the Final Frontier
• Primordial black holes in SB SUSY Gauss-Bonnet inflation
• Revisiting coupled CDM-massive neutrino perturbations in diverse cosmological backgrounds
• Probing PeV scale SUSY-breaking with Satellite Galaxies and Primordial Gravitational Waves
• Measuring the Spin of the Galactic Center Supermassive Black Hole with Two Pulsars
• A comparative study of source-finding techniques in HI emission line cubes using SoFiA, MTObjects, and supervised deep learning
• Tidal Deformability as a Probe of Dark Matter in Neutron Stars
• Fast and accurate collapse-time predictions for collisionless matter
• Cross-correlation of the Polarizations of the 21-cm and Cosmic Microwave Backgrounds
• Theory of interacting vector dark energy and fluid
• Effects of observer peculiar motion on the isotropic background frequency spectrum: from monopole to higher multipoles
• Hawking Radiation Signatures from Primordial Black Holes Transiting the Inner Solar System: Prospects for Detection
• The 4MOST-Cosmology Redshift Survey: Target Selection of Bright Galaxies and Luminous Red Galaxies
• Pulsar tests of the gravitational Lorentz violation
• Statistical distribution of HI 21cm intervening absorbers as potential cosmic acceleration probes
• Tests of Classical Gravity with Radio Pulsars
• Chiral symmetry breaking and pion condensation in the early universe
• Cosmological Non-Gaussianity from Neutrino Seesaw Mechanism
• Cosmological Signatures of Neutrino Seesaw Mechanism
• Realistic assessment of a single gravitational wave source localization taking into account precise pulsar distances with pulsar timing arrays
• Primordial blackholes from Gauss-Bonnet-corrected single field inflation
• Resolving Individual Signals in the Presence of Stochastic Background in Future Pulsar Timing Arrays
• Pulsar tests of the graviton mass
• Exploring the viability of pseudo Nambu-Goldstone boson as ultralight dark matter in a mass range relevant for strong gravity applications
• Shedding Light on Dark Sectors with Gravitational Waves
• The Role of r-Modes in Pulsar Spin-down, Pulsar Timing, and Gravitational Waves
• Accurate pulsar timing array residual variances and correlation of the stochastic gravitational wave background
• Particle production during inflation: constraints expected from redshifted 21 cm observations from the epoch of reionization
• Axion Structure Formation II: The Wrath of Collapse
• EDGES of the dark forest: A new absorption window into the composite dark matter and large scale structure
• A Machine Learning made Catalog of FR-II Radio Galaxies from the FIRST Survey
• Fast Radio Burst Cosmology and HIRAX
• Breaking the degeneracy of non-canonical quartic inflation by reheating considerations
• Search for Continuous Gravitational Wave Signals in Pulsar Timing Residuals: A New Scalable Approach with Diffusive Nested Sampling
• Lepton parity dark matter and naturally unstable domain walls
• Probing the Dark Matter of Three-loop Radiative Neutrino Mass Generation Model with the Cherenkov Telescope Array
• Cosmological Forecasts from the Baryon Acoustic Oscillations in 21cm Intensity Mapping
• Primordial Cosmology of an Emergent-like Universe from Modified Gravity: Reconstruction and Phenomenology Optimization with a Genetic Algorithm
• Probing baryogenesis with gravitational waves
• Axion Dark Matter Archaeology with Primordial Gravitational Waves
• Cosmological test using the high-redshift detection rate of FSRQs with the Square Kilometer Array
• Cosmological Frequency Combs
• Complementary signatures of $\alpha -$attractor inflation in CMB and cosmic string Gravitational Waves
• Searching Stochastic Gravitational Wave Background Landscape Across Frequency Bands
• Cosmic Collider Gravitational Waves sourced by Right-handed Neutrino production from Bubbles: Testing Seesaw, Leptogenesis and Dark Matter
• Cosmic magnification in beyond-Horndeski gravity
• Reconstructing ACT-compatible and GW170817-compatible Einstein-Gauss-Bonnet Inflation from the Observational Indices
• Tracing Cosmological Signature with Doppler Lensing: Insights from Cosmological Simulations
• Description and Application of the Surfing Effect
• Origin & evolution of the Universe
• Probing High Scale Dirac Leptogenesis via Gravitational Waves from Domain Walls
• Applications of Cosmological Perturbation Theory in the Late Universe
• Advantages of Including Globular Cluster Millisecond Pulsars in Pulsar Timing Arrays
• Cosmology of the companion-axion model: dark matter, gravitational waves, and primordial black holes
• Mutated hilltop inflation in light of Planck/ACT observations
• Probing the Inflaton Potential with SKA
• Gravitational Wave Mountains: current-carrying domain walls
• Addressing the too-big-to-fail problem and the void phenomenon through a modified initial power spectrum
• Prospects for detecting and localizing short-duration transient gravitational waves from glitching neutron stars without electromagnetic counterparts
• Primordial magnetic non-Gaussianity with generic vacua and detection prospects in CMB spectral distortions
• Reheating and relic gravitational waves as remedies for degeneracies of non-canonical natural inflation
• Probing the Neutrino Seesaw Scale with Gravitational Waves
• Observation of polarized stochastic gravitational-wave background in pulsar-timing-array experiments
• Uncertainty-Aware Neural Networks for Fuzzy Dark Matter Model Selection from \texorpdfstring{$x_{\mathrm{HI}}$}{x_HI} Measurements
• Thermodynamic Split Conjecture and an Observational Test for Cosmological Entropy
• Cosmological Implications of Thermodynamic Split Conjecture