A no-go theorem excludes Gamma in [0,d] for typical non-topological non-relativistic spherically symmetric solitons, with the same exclusion for barotropic fluid compact objects, ruling out natural soliton explanations for observed dark matter halo cores with Gamma ~1.7.
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Physics-informed Fourier neural operators recover plasmoid formation in sparse SRRMHD vortex data where data-only models fail, and transformer operators approximate AMR jet evolution, marking first reported uses in these relativistic MHD settings.
Neural network corrects residual errors in isotopologue energy extrapolations for CO2 (MAE reduction in >87% of levels vs Marvel) and transfers patterns to improve CO predictions in >93% of samples.
Exact analytic relations express M, α, D (and a) of Schwarzschild-MOG and Kerr-MOG black holes directly in terms of accretion-disk frequency shift, aperture angle, and redshift rapidity (plus acceleration in the rotating case).
In multispecies relativistic turbulence, energization occurs at reconnection current sheets driven by the divergence of the relativistic pressure tensor, with electrons accelerated more efficiently than positrons due to species imbalance.
Develops a fourth-order scalar equation for purely toroidal linear waves on a differentially rotating sphere, proves well-posedness under explicit rotation conditions, and demonstrates local unique identifiability plus convergence of Nesterov-Landweber regularization for the inverse problem of joint
Multi-wavelength timing analysis of an X-class flare reveals temperature-dependent phase drifting in 5-minute QPPs, interpreted as evidence for periodic magnetic reconnection triggered by lower-atmosphere oscillations.
New isotopic data from presolar SiC grains are best reproduced by hydrodynamic models of CO novae, establishing them as the primary source for 1-2% of such grains.
Extended misalignment for axion-like particles with constant-ω_ϕ pre-oscillation and dark radiation coupling yields data-driven constraints favoring negative ω_ϕ and f_ϕ in [80, 1.5×10^10] TeV but does not ease cosmological tensions.
The quiet-Sun temperature ratio R≈2.4 equals the KL-divergence difference between a κ=2.5 distribution and its EUV and radio Maxwellian projections, satisfying ΔD_KL = (3/2)[R0 − ln R0 − 1] = (3/2) d_IS(T_eff, T_core).
Stacking Fermi-LAT data from 21 blazars aligned to their jet directions detects anisotropic extended emission consistent with pair halos produced by a 2.8 x 10^{-16} G intergalactic magnetic field at 3.8 sigma.
G objects are modeled as primordial black hole-neutron star remnants whose population simultaneously accounts for the Galactic Center pulsar deficit.
Derives an electrically charged generalization of the Kiselev black hole metric and studies charged particle orbits, finding prograde periapsis shifts for uncharged particles but possible retrograde shifts for charged ones.
Reanalysis of pulsar data shows polarization angles in PSRs B1133+16 and B2016+28 follow great-circle geodesics on the Poincare sphere due to mode transitions.
Sulphur abundances decrease above 150 G in coronal loops, indicating FIP fractionation is modulated by mean magnetic field strength.
SPADE demonstrates a small, fully digital phased array spectrograph for decameter solar radio observations, with first 2024 data showing temporal and frequency resolution suitable for coronal turbulence and propagation studies.
Derives a unified partial differential equation for perturbations in Bianchi cosmologies and computes the CMB power spectrum for a toy Bianchi V model.
A neural network detector applied to 2011 solar radio spectra identified 50 QFP wave train candidates, with 13 associated with global coronal EUV waves.
Mean-field theory extended to unequal critical temperatures shows neutron vortex cores exceed magnetic penetration depth in neutron star outer cores.
Fast magnetoacoustic waves steepen and dissipate nonlinearly before reaching coronal magnetic null points due to decreasing fast speed in the non-uniform magnetic field.
Experiments reveal that hydrogen plays a central role in forming SiC2, the key precursor to silicon carbide nanodust in carbon-rich stars.
Four new exact Bianchi I solutions in a non-variational scalar field model produce Big Bang, Big Crunch, Big Rip, and cyclic behaviors, with stability to inhomogeneous perturbations depending on singularity type.
A van der Waals-inspired modification to general relativity renders the gravitational coupling dynamical, providing a mechanism to avoid Big Bang and black hole singularities.
GPU-accelerated N-body simulations show that the common acceleration factor f distorts planetary chemical compositions and that terrestrial planets can form resonant chains without gas-driven orbital migration.
citing papers explorer
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A No-Go Theorem for the Mass-Radius Relation of Solitons
A no-go theorem excludes Gamma in [0,d] for typical non-topological non-relativistic spherically symmetric solitons, with the same exclusion for barotropic fluid compact objects, ruling out natural soliton explanations for observed dark matter halo cores with Gamma ~1.7.
-
Learning Neural Operator Surrogates for the Black Hole Accretion Code
Physics-informed Fourier neural operators recover plasmoid formation in sparse SRRMHD vortex data where data-only models fail, and transformer operators approximate AMR jet evolution, marking first reported uses in these relativistic MHD settings.
-
Machine learning isotope shifts in molecular energy levels
Neural network corrects residual errors in isotopologue energy extrapolations for CO2 (MAE reduction in >87% of levels vs Marvel) and transfers patterns to improve CO predictions in >93% of samples.
-
Accretion Disks in Schwarzschild-MOG and Kerr-MOG Backgrounds: MOG Parameter in terms of Observational Quantities
Exact analytic relations express M, α, D (and a) of Schwarzschild-MOG and Kerr-MOG black holes directly in terms of accretion-disk frequency shift, aperture angle, and redshift rapidity (plus acceleration in the rotating case).
-
Particle-acceleration mechanisms in multispecies relativistic plasmas
In multispecies relativistic turbulence, energization occurs at reconnection current sheets driven by the divergence of the relativistic pressure tensor, with electrons accelerated more efficiently than positrons due to species imbalance.
-
Linear toroidal-inertial waves on a differentially rotating sphere with application to helioseismology: Modeling, forward and inverse problems
Develops a fourth-order scalar equation for purely toroidal linear waves on a differentially rotating sphere, proves well-posedness under explicit rotation conditions, and demonstrates local unique identifiability plus convergence of Nesterov-Landweber regularization for the inverse problem of joint
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Phase-drifting with emitting plasma temperature in the quasi-periodic pulsations of an X-class solar flare
Multi-wavelength timing analysis of an X-class flare reveals temperature-dependent phase drifting in 5-minute QPPs, interpreted as evidence for periodic magnetic reconnection triggered by lower-atmosphere oscillations.
-
New NanoSIMS Multielement Isotope Data Reveal CO Novae As Key Sources Of 13C-rich Presolar Silicon Carbide Grains
New isotopic data from presolar SiC grains are best reproduced by hydrodynamic models of CO novae, establishing them as the primary source for 1-2% of such grains.
-
Axion dark matter from extended misalignment with a constant-$\omega_\phi$ pre-oscillatory phase and dark radiation
Extended misalignment for axion-like particles with constant-ω_ϕ pre-oscillation and dark radiation coupling yields data-driven constraints favoring negative ω_ϕ and f_ϕ in [80, 1.5×10^10] TeV but does not ease cosmological tensions.
-
Diagnostic Disagreement as an Information-Projection Divergence: An Information-Theoretic Reading of the Quiet-Sun Temperature Ratio
The quiet-Sun temperature ratio R≈2.4 equals the KL-divergence difference between a κ=2.5 distribution and its EUV and radio Maxwellian projections, satisfying ΔD_KL = (3/2)[R0 − ln R0 − 1] = (3/2) d_IS(T_eff, T_core).
-
Search for Anisotropic Pair Halos Associated with Blazar Jets
Stacking Fermi-LAT data from 21 blazars aligned to their jet directions detects anisotropic extended emission consistent with pair halos produced by a 2.8 x 10^{-16} G intergalactic magnetic field at 3.8 sigma.
-
G objects as Primordial Black Hole-Neutron Star Remnants: Population Modeling and Multi-Wavelength Observables
G objects are modeled as primordial black hole-neutron star remnants whose population simultaneously accounts for the Galactic Center pulsar deficit.
-
Particle dynamics around an electrically charged Kiselev black hole embedded in quintessence
Derives an electrically charged generalization of the Kiselev black hole metric and studies charged particle orbits, finding prograde periapsis shifts for uncharged particles but possible retrograde shifts for charged ones.
-
Polarization Angle Geodesics in PSRs B1133+16 and B2016+28
Reanalysis of pulsar data shows polarization angles in PSRs B1133+16 and B2016+28 follow great-circle geodesics on the Poincare sphere due to mode transitions.
-
Signs of Sulphur fractionation under high magnetic field strength
Sulphur abundances decrease above 150 G in coronal loops, indicating FIP fractionation is modulated by mean magnetic field strength.
-
The Small Phased Array DEmonstrator (SPADE) -- Description and first results
SPADE demonstrates a small, fully digital phased array spectrograph for decameter solar radio observations, with first 2024 data showing temporal and frequency resolution suitable for coronal turbulence and propagation studies.
-
Exploring the CMB in Anisotropic Universes
Derives a unified partial differential equation for perturbations in Bianchi cosmologies and computes the CMB power spectrum for a toy Bianchi V model.
-
Detector for fast wave trains in the solar radio emission
A neural network detector applied to 2011 solar radio spectra identified 50 QFP wave train candidates, with 13 associated with global coronal EUV waves.
-
The mean-field theory of superfluid-superconducting vortex states in the outer core of neutron stars
Mean-field theory extended to unequal critical temperatures shows neutron vortex cores exceed magnetic penetration depth in neutron star outer cores.
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Nonlinear steepening of a fast magnetoacoustic wave in the vicinity of a coronal magnetic null point
Fast magnetoacoustic waves steepen and dissipate nonlinearly before reaching coronal magnetic null points due to decreasing fast speed in the non-uniform magnetic field.
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The Significant Role of Hydrogen in the Formation of Silicon Carbide in Evolved Stars
Experiments reveal that hydrogen plays a central role in forming SiC2, the key precursor to silicon carbide nanodust in carbon-rich stars.
-
Non-variational scalar field cosmology: Exact Bianchi I solutions for near-minimal scalar fields
Four new exact Bianchi I solutions in a non-variational scalar field model produce Big Bang, Big Crunch, Big Rip, and cyclic behaviors, with stability to inhomogeneous perturbations depending on singularity type.
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Van der Waals Gravity Theory
A van der Waals-inspired modification to general relativity renders the gravitational coupling dynamical, providing a mechanism to avoid Big Bang and black hole singularities.
-
Terrestrial planet formation in the era of GPU computing
GPU-accelerated N-body simulations show that the common acceleration factor f distorts planetary chemical compositions and that terrestrial planets can form resonant chains without gas-driven orbital migration.
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Single field slow-roll inflation with step uplift to $n_s=1$
Single-field slow-roll inflation achieves ns=1 by ending inflation suddenly via a large step in the potential.
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Thermodynamical uncertainties for primordial black holes from cosmological phase transitions
A state-of-the-art thermodynamic analysis of supercooled phase transitions yields a universal lower bound β/H_* ≃ 5 and shows that viable PBH dark-matter parameter space in classically conformal gauge-Higgs theories is severely limited by percolation and QCD constraints.
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Cosmological Viability of Exponential Infrared $f(T)$ Gravity
Exponential IR f(T) gravity Model I alleviates Hubble tension but is disfavoured by combined Planck/ACT/SPT+DESI+Pantheon+ data; Model II is ruled out because background constraints force unphysical shifts in CMB parameters.
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Ion firehose and ion cyclotron instability with subtracted-Kappa distributions
Numerical study showing that increased loss-cone features in bi-kappa ion distributions decrease firehose growth rates and increase ion-cyclotron growth rates, with additional effects from electron anisotropy and drift.
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GRMHD and GRRT Simulations of Black Hole Accretion: Flares, Precession, and Complex Spacetimes
Simulations of accreting black holes in standard and complex spacetimes indicate that magnetic geometry, quantum corrections, and binary dynamics influence flares, precession, photon rings, and multi-wavelength variability, with potential EHT constraints.
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Spectropolarimetric analysis of waves linked to FIP
Stokes V amplitude asymmetries are proposed as an alternative diagnostic for wave activity linked to FIP bias in the solar corona.
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Detection and characterization of the temperate super-earth Gliese 48 b
Re-analysis of multi-year RV data and TESS photometry detects Gliese 48 b, a temperate super-Earth with P=39.63 days, M sin i=8.11 Earth masses, no transit, and incident flux 0.889 S_earth.
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Photon regions, shadow observables and constraints from M87* of a Kerr-Newman-like black hole in Bumblebee gravity surrounded by plasma
The shadow of a Kerr-Newman-like black hole in Bumblebee gravity with plasma is analyzed via observables and constrained by M87* EHT data, with spin and Lorentz violation mainly distorting the shape while charge and plasma shrink the size.
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Stochastic Quantum Mechanics Trajectories Near Schwarzschild Horizon Black Holes
Stochastic trajectories near Schwarzschild horizons are shaped by gravitational fluctuations, producing different behaviors depending on angular momentum, particle frequency, and integration time.
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rcosmo: R Package for Analysis of Spherical, HEALPix and Cosmological Data
rcosmo is a new R package with over 100 functions for analysis of HEALPix spherical data including CMB, plus coordinate transformation tools.
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PiMiX 2.0: AI-enhanced Data Fusion for Radiographic Imaging and Tomography
PiMiX 2.0 extends prior PiMiX work into an AI-enhanced framework for multimodal RadIT data ingestion, 3D/4D reconstruction, and physics-aware interpretation.
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Testing an anisotropic spinor field--based Modified Chaplygin Gas model in Kantowski--Sachs spacetime with observational constraints
A spinor-field Modified Chaplygin Gas model in Kantowski-Sachs spacetime yields H0 of 67-68 km/s/Mpc, late-time isotropy, q0 of -0.49, and a better AIC fit than LambdaCDM.
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Prediction of Celestial Pole Offsets Based on Sliding Window and Bivariate Least Squares Fitting
A 900-day sliding window plus bivariate least squares fitting yields lower MAE for celestial pole offset forecasts than prior competition entries and IERS daily files.
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Electron-impact ionization rates for neutral He, Li, and Be in the Tsallis framework
A sensitivity study shows Tsallis q-distributions alter ionization rates for He, Li, and Be, with q<1 suppressing and q>1 enhancing low-temperature rates, while separating cross-section and EEDF uncertainties and releasing the code.
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ECLAIRs: the SVOM high-energy transient trigger camera
ECLAIRs is the autonomous trigger and localization camera for high-energy transients on the SVOM satellite, with reported design details and early science performance through March 2025.
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Technology Research Software: An Often Overlooked Category of Research Software
Technology research software is a distinct but overlooked category of research software developed in technology research, with subroles defined by technology readiness levels.
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High-Contrast Imaging of Forming Protoplanets: VLTs, JWST, and the Promise of ELT
Reviews direct imaging of protoplanets and proposes deriving observational estimates of planet mass-to-radius ratio to test formation models, highlighting ELT capabilities.
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The Two-component Model of the 'spokes' in Saturn's Rings
The spokes are modeled as a two-component system of persistent diamagnetic pyrolytic carbon and transient diamagnetic ice grains whose visibility and dynamics are controlled by electromagnetic interactions with Saturn's magnetosphere and solar elevation.
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Challenges for $\Lambda$CDM: An update
The review updates the status of multiple cosmological and astrophysical signals that appear inconsistent with LambdaCDM as defined by the Cosmological Principle, General Relativity, and Planck18 parameters.
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Numerical modeling of cosmic-ray transport in the heliosphere and interpretation of the proton-to-helium ratio in Solar Cycle 24
Numerical and analytical modeling of cosmic-ray transport attributes the long-term variation in the AMS-observed proton-to-helium ratio below 3 GV to mass-to-charge dependence in the heliospheric diffusion coefficient.
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VLBI Tracking of the JUICE Mission: Two Years of Cruise Phase Operations and Performance Analysis
VLBI tracking of JUICE during cruise phase yields Doppler residual characterisation, mission performance indicators, and solar wind scintillation analysis using the UTAS array.
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Machine-learning applications for weak-lensing cosmology
Machine learning techniques can mitigate limitations in traditional weak-lensing analyses and enhance extraction of cosmological information from galaxy imaging surveys.
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Application of Machine Learning to 21 cm Cosmology
Review chapter organizing machine learning methods for 21 cm cosmology into observation, theory, and inference domains.
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Interpreting Galaxy Physical Properties Using Stellar Population Synthesis
The thesis assesses the reliability of stellar population synthesis modeling for galaxy physical properties using limited multi-band photometry rather than full spectra.
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The connection between solar coronal abundances and the underlying lower atmospheric properties
Observational evidence points to the chromosphere as the site of chemical fractionation responsible for the FIP effect in the solar corona.
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Current Unsolved Problems in Planetary Nebulae Research
The review identifies and discusses key unsolved problems in planetary nebulae such as 3D morphology, multipolar origins, dust distribution, binarity, and the abundance discrepancy, along with suggested future directions.