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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EHT data show a 51.8 microarcsecond ring around Sgr A* consistent with the shadow of a 4 million solar mass Kerr black hole viewed at moderate inclination.
Transient Faraday-complex spectropolarimetric structure detected during radio flaring of Swift J1727 implies internal Faraday rotation from electron-proton jet plasma with rotating mass ~10^21 g, a small fraction of accreted mass.
Synchrotron polarization at the black hole horizon follows a universal pattern set solely by spin and inclination.
FIRE-2 simulations show per-galaxy tidal disruption rates peak near z=2.5 at 4e-4 per year, correlate with SFR and central density, and remain high in satellite galaxies at early times.
Primordial black holes captured by stars lead to either quiet consumption or explosive disruption via disk formation, producing transients and high-spin remnants with potentially observable event rates.
Red quasars are intrinsically X-ray weak with low alpha_OX values, tracing a distinct evolutionary stage of suppressed black hole accretion relative to stellar mass growth.
Confirmation of 77 new heavily reddened quasars at 1.5 < z < 3.9 with high luminosities and extinctions, showing they are deficient in hot and warm dust relative to blue quasars and supporting a blow-out feedback phase.
SDSSJ110546.07+145202.4 is the first known long-duration radio changing-look NLS1 galaxy whose outburst is explained by an accretion-rate change that triggered a powerful radio jet.
A white dwarf on an eccentric orbit around an intermediate-mass black hole undergoes successive partial tidal disruptions, with frame-dragging precession producing the irregular flares observed in GRB 250702B.
Cold compact circumbinary rings evolve into highly eccentric disks with suppressed accretion and dominant variability at ~0.1 times the binary orbital frequency via a stream impact mechanism.
Neutrino-cooled collapsar disks in 3D GRMHD simulations lead to black hole equilibrium spins of a_eq ≈ 0.13, enabling 4-16x more powerful LGRB jets than non-radiative models.
VAPOLA releases multi-epoch multi-band ALMA full-Stokes products and polarimetric fits for AGN and Sgr A* via an automated pipeline and web portal.
A Chimera accretion flow can sustain MAD-level horizon flux and electromagnetic jet power without the standard MAD's eruptive variability, mass-flow geometry, or inner-disk morphology, so MAD-like behavior is multi-diagnostic and history-dependent.
Steady GRMHD jets exhibit a universal near-horizon polarization pattern set only by black hole spin, with large-radius polarization angle following a collimation-determined power law and intermediate scales modified by plasma loading.
Derives GR jump conditions and self-similar shock solutions for SIS collapse to BH, showing shocks up to 0.4c, accretion suppressed by factor 5-7, and shock energy release ~10% of enclosed rest mass.
Machine learning on simulated images identifies that flux eruption events cause more diffuse, polarized, lower-flux millimeter emission with decreased Q-U loop rotation rate, achieving ~80% accuracy with random forests on summary statistics.
VLBI observations of TXS 0506+056 show a spine-sheath jet with aligned inner and perpendicular outer EVPAs plus a new superluminal component near the IceCube neutrino detection.
GW190814 is proposed to originate from a collapsar-disk fragment merging with the central black hole, potentially preceded by SN2019npv ~60 days earlier, yielding H0 = 70.5 (+9.2, -6.4) km/s/Mpc.
Efficient neutrino production in blazar jets requires an external radiation field that strongly dominates the magnetic field (Y>>1), which radio constraints place near the broad-line region and only for uncommon jet acceleration or beaming conditions.
In cool-core cluster simulations, mixing with pre-existing cold gas, not direct radiative cooling, dominates condensation; magnetic fields stretch the pre-condensation history to ~150 Myr and brake infalling clouds through tension.
Only the simultaneous presence of AGN jets and winds produces sufficient turbulence via their interaction to suppress star formation in elliptical galaxies; neither component alone is effective.
Fitting 80 SNe Ic-BL lightcurves with a magnetar-plus-Ni model reveals a universal ejecta-mass–spin-period anti-correlation linking SNe Ic-BL, SLSNe, and FBOTs to a common magnetar origin.
RIAF polarized-transfer models of six poloidal field geometries show Faraday-conversion-dominated, polarity-invariant CP for radial/parabolic fields and emission-dominated, polarity-sensitive CP for dipole/vertical fields; ALMA’s negative V_net excludes reversed fields at high inclination.
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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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First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
EHT data show a 51.8 microarcsecond ring around Sgr A* consistent with the shadow of a 4 million solar mass Kerr black hole viewed at moderate inclination.
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Spectropolarimetric detection of baryonic mass loading in a transient relativistic jet: application to the black hole X-ray binary Swift J1727.8$-$1613
Transient Faraday-complex spectropolarimetric structure detected during radio flaring of Swift J1727 implies internal Faraday rotation from electron-proton jet plasma with rotating mass ~10^21 g, a small fraction of accreted mass.
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Black Hole Polarimetry III: Universal Polarization of Synchrotron Radiation at the Horizon
Synchrotron polarization at the black hole horizon follows a universal pattern set solely by spin and inclination.
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TDEs on FIRE: Illuminating the Cosmic Evolution of Tidal Disruption Rates
FIRE-2 simulations show per-galaxy tidal disruption rates peak near z=2.5 at 4e-4 per year, correlate with SFR and central density, and remain high in satellite galaxies at early times.
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The Life and Death of Stars That Capture Primordial Black Holes
Primordial black holes captured by stars lead to either quiet consumption or explosive disruption via disk formation, producing transients and high-spin remnants with potentially observable event rates.
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SDSS-V: Revealing a weak accretion state in X-ray selected red quasars
Red quasars are intrinsically X-ray weak with low alpha_OX values, tracing a distinct evolutionary stage of suppressed black hole accretion relative to stellar mass growth.
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Hidden Monsters with SPHEREx I: A goldmine for heavily reddened quasars at cosmic noon
Confirmation of 77 new heavily reddened quasars at 1.5 < z < 3.9 with high luminosities and extinctions, showing they are deficient in hot and warm dust relative to blue quasars and supporting a blow-out feedback phase.
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SDSSJ110546.07+145202.4: The first long-duration radio changing-look NLS1 galaxy
SDSSJ110546.07+145202.4 is the first known long-duration radio changing-look NLS1 galaxy whose outburst is explained by an accretion-rate change that triggered a powerful radio jet.
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Successive Partial Disruptions with Orbital Precession in a White Dwarf-Black Hole System for Repeating GRB 250702B
A white dwarf on an eccentric orbit around an intermediate-mass black hole undergoes successive partial tidal disruptions, with frame-dragging precession producing the irregular flares observed in GRB 250702B.
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Eccentric Disks from Gaseous Rings around Equal-Mass, Circular Binaries
Cold compact circumbinary rings evolve into highly eccentric disks with suppressed accretion and dominant variability at ~0.1 times the binary orbital frequency via a stream impact mechanism.
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Black Hole Spin-down in Collapsars in 3D Neutrino Transport GRMHD Simulations
Neutrino-cooled collapsar disks in 3D GRMHD simulations lead to black hole equilibrium spins of a_eq ≈ 0.13, enabling 4-16x more powerful LGRB jets than non-radiative models.
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VAPOLA -- A multi-year, multi-band polarization survey of AGN and Sgr A* at mm wavelengths with ALMA I. Survey Overview and Science-Ready Archival Products
VAPOLA releases multi-epoch multi-band ALMA full-Stokes products and polarimetric fits for AGN and Sgr A* via an automated pipeline and web portal.
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The SANE, the MAD, and the Chimera
A Chimera accretion flow can sustain MAD-level horizon flux and electromagnetic jet power without the standard MAD's eruptive variability, mass-flow geometry, or inner-disk morphology, so MAD-like behavior is multi-diagnostic and history-dependent.
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Polarization Architecture of Steady GRMHD Jets from the Horizon to Infinity
Steady GRMHD jets exhibit a universal near-horizon polarization pattern set only by black hole spin, with large-radius polarization angle following a collimation-determined power law and intermediate scales modified by plasma loading.
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General Relativistic Shock Wave Solutions with Black Hole Formation: The Singular Isothermal Sphere Case
Derives GR jump conditions and self-similar shock solutions for SIS collapse to BH, showing shocks up to 0.4c, accretion suppressed by factor 5-7, and shock energy release ~10% of enclosed rest mass.
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Identifying Observational Signatures of Flux Eruption Events in Supermassive Black Hole Accretion Flows with Machine Learning
Machine learning on simulated images identifies that flux eruption events cause more diffuse, polarized, lower-flux millimeter emission with decreased Q-U loop rotation rate, achieving ~80% accuracy with random forests on summary statistics.
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Parsec-scale polarimetry and kinematics of a spine-sheath jet in the neutrino-blazar TXS 0506+056
VLBI observations of TXS 0506+056 show a spine-sheath jet with aligned inner and perpendicular outer EVPAs plus a new superluminal component near the IceCube neutrino detection.
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A Collapsar-Disk Origin for GW190814
GW190814 is proposed to originate from a collapsar-disk fragment merging with the central black hole, potentially preceded by SN2019npv ~60 days earlier, yielding H0 = 70.5 (+9.2, -6.4) km/s/Mpc.
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Locating the Production Sites of High-Energy Neutrinos in Blazar Jets
Efficient neutrino production in blazar jets requires an external radiation field that strongly dominates the magnetic field (Y>>1), which radio constraints place near the broad-line region and only for uncommon jet acceleration or beaming conditions.
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XMAGNET -- Stir before serving: a Lagrangian perspective on mixing-driven condensation in the intracluster medium
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Turbulence and Star Formation Suppression in Elliptical Galaxies: The Role of Active Galactic Nucleus Jet Wind Interaction
Only the simultaneous presence of AGN jets and winds produces sufficient turbulence via their interaction to suppress star formation in elliptical galaxies; neither component alone is effective.
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Magnetar Engines in Broad-lined Type Ic Supernovae and a Unified Picture for Magnetar-powered Stripped-envelope Supernovae
Fitting 80 SNe Ic-BL lightcurves with a magnetar-plus-Ni model reveals a universal ejecta-mass–spin-period anti-correlation linking SNe Ic-BL, SLSNe, and FBOTs to a common magnetar origin.
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Circular polarization images of Sgr A* for different magnetic field geometries
RIAF polarized-transfer models of six poloidal field geometries show Faraday-conversion-dominated, polarity-invariant CP for radial/parabolic fields and emission-dominated, polarity-sensitive CP for dipole/vertical fields; ALMA’s negative V_net excludes reversed fields at high inclination.
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Simulating the late stages of WD-BH/NS mergers: an origin for fast X-ray transients and GRBs with periodic modulations
SPH simulations of repeated partial disruptions in 16 WD-BH/NS systems predict three categories of periodically modulated X-ray/GRB transients whose durations and peak rates depend on mass ratio and compactness.
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Multi-wavelength Constraints on the Transient EP250905a
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Prospect for Detection of Strongly Lensed Multi-messenger Signals of Binary Neutron Star Mergers
Future CE+ET detectors may detect lensed BNS kilonovae at ~0.5/yr via pointed follow-up of known galaxy lenses, while lensed sGRBs and afterglows remain rare or undetectable with current-generation facilities.
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Minimum Energies and Magnetic Field Strengths of Edge-brightened Compact Symmetric Objects
CSO-2 radio lobes sit near minimum-energy magnetic fields of ~20 mG, implying rapid GHz fading post-jet-shutoff and massive-star origins for luminous sources.
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Magnetic field and plasma number density from radio and millimeter core measurements in AGN jets
Derives B*(d) and N*(d) for AGN jet cores from self-absorbed synchrotron emission model with power-law assumptions on Doppler factor, Lorentz factor, B, and N versus jet width d.
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Accretion-Driven Evolution of Compact-Object Populations in Gas-Rich Environments and the Origin of Massive Gravitational-Wave Sources
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Deep Newtonian Afterglows: Theoretical Light Curves for Quasi-spherical Outflows
An analytical model for multiwavelength synchrotron emission from decelerated quasi-spherical ejecta with energy injection in stratified environments is developed for the deep Newtonian regime of GRB afterglows.
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RAD@home discovery of a bow-and-arrow radio galaxy tracing a ~560 kpc bow-shock structure in a multi-halo environment
Citizen science discovery of a bow-and-arrow radio galaxy with ~560 kpc bow-shock-like structure in a multi-halo environment at z=0.159.
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Ring Position Angles and Spin in M87* and Sgr A*
GRMHD models show PA1 aligns with the approaching limb for high spins, enabling mild disfavoring of low spins and strong disfavoring of Earth-pointing spins in M87* from EHT data, with similar potential for Sgr A*.
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Disk reflection as the origin of the X-ray polarization of NGC 4151 with IXPE
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Magnetic Configuration Imprints on Quasi-Periodic Variability in GRMHD Simulations of Thin Accretion Disks
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A Weak Fe K$\beta$ Emission Line in the Broad-Line Radio Galaxy 3C 111 Observed with XRISM: An Ionized Wind Absorption Feature?
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GRMHD Simulations of Magnetized Accretion Disk/Jet: Variabilities of Black Holes and Spectral Energy Distributions in Magnetic States
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The impact of flickering variability and magnetisation on the dynamics, stability and morphology of radio-loud AGN jets
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A population-based approach to understanding radio AGN feedback with LOFAR: The LoTSS Deep Fields
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Characterizing Gamma-Radio Delayed Flaring Activity from Blazars
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Effects of tidal charge on Blandford-Znajek process around braneworld black holes
Positive tidal charge reduces Blandford-Znajek power by up to 15.2% while negative tidal charge increases it by up to 66.5% compared to Kerr black holes of equal mass and angular velocity.
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Kilonovae and Long-duration Gamma-ray Bursts
Kilonova-like emissions after long GRBs GRB211211A and GRB230307A are consistent with collapsar nucleosynthesis using a single weak r-process component without lanthanide-rich material.
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Direct VLBI evidence for a buried AGN in the triple-merger LIRG UGC 2369S
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The Fundamental Planes of Black Hole Activity for High-Synchrotron-Peaked BL Lacertae Objects
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GRMHD and GRRT Simulations of Black Hole Accretion: Flares, Precession, and Complex Spacetimes
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The link between obscured accretion and mildly relativistic precessing jets
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A dark-matter-sensitive orientation clock near rotating black holes
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The role of major mergers in triggering super-Eddington accretion
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A 0.03 Hz Radio Quasi-periodic Oscillation During the 2025 Flare of GRS 1915+105
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