3D GRMHD collapsar simulations initialized with toroidal fields demonstrate that an accretion-disk dynamo generates poloidal fields and launches variable, wobbling jets with LGRB-comparable power.
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The first empirical O/H-Ne23 calibration from JWST data on 18 nebulae yields a tight 0.06 dex scatter relation over 1.5 dex in metallicity.
First kinetic PIC simulation of expanding turbulent solar wind shows preferential parallel electron energization forming power-law tails under weakly compressive Alfvénic conditions.
Late strange-mode pulsations from supermassive stars eject compact, nitrogen-rich gas shells that reproduce the dense circumstellar environments of Little Red Dots before the star collapses into a heavy black hole seed.
EP250302a shows chromatic flares interpreted as the first observed late-time collision of two relativistic shells in an EFXT, indicating central engine reactivation.
Dynamic Time Warping with a shared warping path across parameters aligns binary stellar tracks for accurate interpolation while preserving physical relationships such as the Stefan-Boltzmann law.
Time-resolved XRISM spectroscopy shows the corona in MCG-6-30-15 expands to ~15 rg and reaches 0.27c during a flare, collapses to within 2.5 rg during dips, and the black hole has spin a > 0.93.
In LambdaCDM simulations, over 90% of subhalo sinking events occur between adjacent hierarchy levels, satellite-satellite mergers can rival central-satellite rates at low masses, and the overall merger landscape deviates from self-similarity.
Geant4-IcyMoons enables the first transport-ready Monte Carlo simulation of electron irradiation in water ice and shows hemisphere-dependent deposition depths on Europa that may explain observed radiolysis product patterns.
No definitive lensing is detected in GW231123, though a potential microlensing feature with modulation amplitude up to 0.8 at 95% confidence is noted, limited by large waveform systematics in short signals.
New JWST multi-filter imaging of Sgr B2 detects previously hidden massive stars and ionized structures while finding no extended young stellar objects, implying star formation there has only recently begun.
The GeV phaseograms of three canonical young pulsars decompose into lower-altitude corotating beams sharpening main peaks and higher-altitude radially outflowing beams producing bridges and ripples within a single four-beam geometry.
KilonovaSCORER uses kilonova model grids and sequential ABC diagnostics to score candidates and distinguish kilonovae from supernovae in real-time GW follow-up observations.
A new SPHEREx-based spectral library doubles the sample of ultracool dwarfs with 0.75-5.0 micron spectrophotometry to 7402 objects and provides automated typing tools.
Using simulated LuSEE-Night spectra, Bayesian inference with an emulator trained on 216 HFSS beam models recovers lunar subsurface dielectric parameters and Galactic foreground spectral parameters jointly, but only when the true parameters sit on the simulation grid.
External photoevaporation from high UV fields reduces the average lifetime of protoplanetary disks in star-forming regions.
Chemically driven convection can be sustained during the helium core flash by rapid carbon production but is too weak above the red giant branch bump.
Cosmic rays enhance momentum transfer in Kelvin-Helmholtz turbulent shear flows by acting as long-range messengers when their gyroradii are smaller than the shear scale, increasing effective viscosity even when not energetically dominant.
Multi-D progenitor perturbations leave shock revival and explosion energetics essentially unchanged in 2D CHIMERA runs; any effects sit below the level of numerical stochasticity.
Star formation histories inferred for z=2-5 massive quiescent galaxies imply past number densities that align with observed rapid evolution since z~7.
GOPREAUX supplies Gaussian process models and a large open dataset for non-parametric interpolation of transient photometry across phase and wavelength.
Young stars younger than 630 Myr are widespread in M82's halo including a 20 kpc tail, with total mass ~4e6 solar masses, suggesting outflow-triggered extraplanar star formation.
Release of 158 SPTpol AGN light curves at 90 and 150 GHz with analysis finding >10 sigma correlation between fractional intrinsic variance and mean spectral index.
A mode-coupling model reproduces the qualitative frequency-dependent circular polarization of selected FAST single pulses, but its Bayesian parameter constraints are undermined by the model's poor fits to most pulses.
citing papers explorer
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Jets from Scratch: A 3D Dynamo Origin of Long Gamma-Ray Burst Jets
3D GRMHD collapsar simulations initialized with toroidal fields demonstrate that an accretion-disk dynamo generates poloidal fields and launches variable, wobbling jets with LGRB-comparable power.
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The First Empirical Calibration of the MIR Abundance Diagnostic Ne$_{23}$ with JWST
The first empirical O/H-Ne23 calibration from JWST data on 18 nebulae yields a tight 0.06 dex scatter relation over 1.5 dex in metallicity.
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Formation of Suprathermal Electron Populations in the Expanding, Turbulent Solar Wind
First kinetic PIC simulation of expanding turbulent solar wind shows preferential parallel electron energization forming power-law tails under weakly compressive Alfvénic conditions.
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Pulsational mass loss from supermassive stars creates the compact shells of Little Red Dots
Late strange-mode pulsations from supermassive stars eject compact, nitrogen-rich gas shells that reproduce the dense circumstellar environments of Little Red Dots before the star collapses into a heavy black hole seed.
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A fast X-ray transient with chromatic flares: signatures of violent collisions induced by late-time central engine reactivation
EP250302a shows chromatic flares interpreted as the first observed late-time collision of two relativistic shells in an EFXT, indicating central engine reactivation.
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Irregularly Sampled Time Series Interpolation for Binary Evolution Simulations Using Dynamic Time Warping
Dynamic Time Warping with a shared warping path across parameters aligns binary stellar tracks for accurate interpolation while preserving physical relationships such as the Stefan-Boltzmann law.
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Time-resolved XRISM spectroscopy reveals the evolution and structure of the corona in MCG-6-30-15
Time-resolved XRISM spectroscopy shows the corona in MCG-6-30-15 expands to ~15 rg and reaches 0.27c during a flare, collapses to within 2.5 rg during dips, and the black hole has spin a > 0.93.
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The Broken Similarity: Sinking and Merging of Dark Matter Subhalos Across Hierarchical Levels
In LambdaCDM simulations, over 90% of subhalo sinking events occur between adjacent hierarchy levels, satellite-satellite mergers can rival central-satellite rates at low masses, and the overall merger landscape deviates from self-similarity.
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Geant4-IcyMoons: Simulating Electron Interaction Physics in Irradiated Astrophysical Ices
Geant4-IcyMoons enables the first transport-ready Monte Carlo simulation of electron irradiation in water ice and shows hemisphere-dependent deposition depths on Europa that may explain observed radiolysis product patterns.
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The First Model-Independent Upper Bound on Micro-lensing Signature of the Highest Mass Binary Black Hole Event GW231123
No definitive lensing is detected in GW231123, though a potential microlensing feature with modulation amplitude up to 0.8 at 95% confidence is noted, limited by large waveform systematics in short signals.
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JWST's first view of the most vigorously star-forming cloud in the Galactic center -- Sagittarius B2
New JWST multi-filter imaging of Sgr B2 detects previously hidden massive stars and ionized structures while finding no extended young stellar objects, implying star formation there has only recently begun.
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A common four-beam geometry reveals altitude-stratified GeV pulses in canonical young pulsars
The GeV phaseograms of three canonical young pulsars decompose into lower-altitude corotating beams sharpening main peaks and higher-altitude radially outflowing beams producing bridges and ripples within a single four-beam geometry.
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KilonovaSCORER: Prior-Predictive Scoring of Kilonovae for Real-Time Multimessenger Follow-Up
KilonovaSCORER uses kilonova model grids and sequential ABC diagnostics to score candidates and distinguish kilonovae from supernovae in real-time GW follow-up observations.
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A SPHEREx Pipeline and Spectral Library for Ultracool Dwarfs
A new SPHEREx-based spectral library doubles the sample of ultracool dwarfs with 0.75-5.0 micron spectrophotometry to 7402 objects and provides automated typing tools.
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Joint Estimation of Properties of the Lunar Subsurface and Galactic Foregrounds with LuSEE-Night
Using simulated LuSEE-Night spectra, Bayesian inference with an emulator trained on 216 HFSS beam models recovers lunar subsurface dielectric parameters and Galactic foreground spectral parameters jointly, but only when the true parameters sit on the simulation grid.
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The Effect of External Photoevaporation on the Disk Fraction in M17
External photoevaporation from high UV fields reduces the average lifetime of protoplanetary disks in star-forming regions.
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On the possibility of chemically driven convection in red giants. Implications for the He-core flash and mixing above the Red Giant Branch Bump
Chemically driven convection can be sustained during the helium core flash by rapid carbon production but is too weak above the red giant branch bump.
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Hybrid Simulations of Supersonic Shear Flows: II) Cosmic Ray Viscosity
Cosmic rays enhance momentum transfer in Kelvin-Helmholtz turbulent shear flows by acting as long-range messengers when their gyroradii are smaller than the shear scale, increasing effective viscosity even when not energetically dominant.
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Impacts of Multidimensional Progenitor Perturbations on Core-Collapse Supernova Explosions
Multi-D progenitor perturbations leave shock revival and explosion energetics essentially unchanged in 2D CHIMERA runs; any effects sit below the level of numerical stochasticity.
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Winding Back the Clock: Recent Star Formation Histories of Massive Quiescent Galaxies Are Consistent With Their Rapid Number Density Evolution Since $\mathbf{z\sim7}$
Star formation histories inferred for z=2-5 massive quiescent galaxies imply past number densities that align with observed rapid evolution since z~7.
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GOPREAUX I: Open-source Code and Data to Model Multi-wavelength Emission of Extragalactic Transients using Gaussian Processes
GOPREAUX supplies Gaussian process models and a large open dataset for non-parametric interpolation of transient photometry across phase and wavelength.
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Stars Born in the Wind II: Widespread Extra-planar Star Formation in M82's Halo
Young stars younger than 630 Myr are widespread in M82's halo including a 20 kpc tail, with total mass ~4e6 solar masses, suggesting outflow-triggered extraplanar star formation.
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The South Pole Telescope AGN Monitoring Campaign: First Release of SPTpol Bright AGN Light Curves
Release of 158 SPTpol AGN light curves at 90 and 150 GHz with analysis finding >10 sigma correlation between fractional intrinsic variance and mean spectral index.
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Pulsar electrodynamics inferred from frequency-dependent circular polarization diversity
A mode-coupling model reproduces the qualitative frequency-dependent circular polarization of selected FAST single pulses, but its Bayesian parameter constraints are undermined by the model's poor fits to most pulses.
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A window for water-hydrogen demixing on warm metal-rich sub-Neptunes
Water-hydrogen demixing occurs on warm sub-Neptunes with envelope metallicities of 150-700 times solar, including TOI-270 d, implying layered interiors and underestimated bulk metallicities when using fully-miscible models.
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The role of three-dimensional effects on ion injection and acceleration in perpendicular shocks
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A Deep ALMA Survey of the Redshift Distribution of Dusty Star-forming Galaxies
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Impact of Clouds on the Atmosphere-Mantle Interface of Sub-Neptunes
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Correlation Between Lunar Surface and Exospheric Sodium: Effects of Albedo-Driven Temperature on Multilayer Sodium Reservoirs Rather Than Surface Abundance Variations
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