Detection of a variable stratified UFO with velocities 0.1c and 0.3c, extreme mass outflow rates, and kinetic powers of 1-10% of bolometric luminosity in quasar WISSH13 at z=3.294.
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X-ray reverberation lags are used to measure the mass of the stellar-mass black hole Cygnus X-1 for the first time.
Milky Way globular clusters formed with initial half-mass densities of ~10^6.4 M_sun/pc^3, bottom-light IMFs, and small present-day black hole mass fractions, inferred by coupling rapid evolution models with multimass equilibrium models fitted to present-day observations.
One acceleration measurement equals ~10^5 phase-space measurements for local dark matter density estimation, with acceleration outperforming Jeans modeling in both equilibrium and perturbed Milky Way simulations.
GraphNPE recovers a significantly lower central density for Boötes I consistent with a core while Draco remains marginally cuspy, and demonstrates that higher-order velocity moments reduce bias in dynamical modeling.
Detection of a non-harmonic QPO precursor to Type-B in the HIMS of MAXI J1820+070 using NICER timing data.
Low-redshift IGM measured to be extremely hot (T0 ≈ 28,000 K) and nearly isothermal at z=0.1, with Gamma_HI lower than UV-background models, possibly due to 15 km/s turbulence.
Self-regulating AGN jets in MHD simulations of cool-core clusters yield realistic FRI radio morphologies viewed along the jet axis and account for frequency-independent lobe extents via 1-50 μG fields allowing both young and old electrons to radiate.
Self-consistent spherical accretion simulations show cooling-enhanced growth of PBHs with radiative efficiency ~10^{-2} in the bremsstrahlung regime, yielding a critical seed mass of ~10^{-16} M_sun to consume a solar-mass star in a Hubble time.
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.
Type-C QPO amplitudes correlate linearly with jet inclination up to 8 Hz in BH LMXBs, lower on decay than rise, reproducible by precessing hot flow if misalignment ≥10-15°.
First detection of QPOs above 250 keV in Swift J1727.8-1613 with up to 8.9 sigma significance, showing decreasing rms and increasing soft lags that suggest a geometric origin from small-scale jet precession.
Boötes III has σ_v ≈ 1.7 km/s, a recent ~9.5 kpc pericenter on a polar eccentric orbit, and is actively tidally disrupting, with debris broadly consistent with the Styx stream.
AGN radiation pressure, not black-hole mass, simultaneously boosts large-scale [O III] outflows and clears circumnuclear gas as Eddington ratio rises.
SN 2011kl is broadly consistent with an LFBOT light-curve model and ULGRB hosts match LFBOT/LGRB environments, supporting a shared He-CO merger progenitor for a subset of both classes.
In 24 BHXRB outbursts, the thermal disk luminosity drops below the soft-state exponential decay baseline, and this deficit is used as a tracer of disk truncation, corroborated by decreasing timing frequencies.
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.
Simulations of Milky Way-mass galaxies reveal direction-dependent dynamical heating during stellar radial migration, with inward migrators heating, some cooling, and cold preservation uncommon especially for older stars.
Galaxies become less concentrated, more asymmetric and less clumpy toward lower stellar masses, with bar fraction declining to zero near 10^8 solar masses and CAS parameters losing separating power in the dwarf regime.
In 37 massive ETGs, the IMF becomes less bottom-heavy with radius, with average α_IMF falling from 2.16 to 1.74 and IMF gradients dominating M/L variations over stellar population effects.
High-resolution zoom-in simulation of a z~10 galaxy produces over 10^5 star clusters with scale-free mass function, 90% of star formation in clusters, global SFE 0.2-0.3, and reproduces JWST super-bright galaxies via feedback-free bursts.
Koposov 2 is an ancient, extremely metal-poor, compact stellar system best explained as a dissolving globular cluster, not a dwarf galaxy.
X-ray timing and spectral analysis of ASKAP J174508.9-505149 detects matching periodicity and features consistent with an accreting magnetic CV.
The Guitar nebula's pulsar appears to accelerate electrons to within ~3/4 of the theoretical maximum potential, and its brightness is best explained by the pulsar crossing an old supernova remnant's compressed, magnetized shell.
citing papers explorer
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The WISSHFUL program: the highest redshift UFO discovered in a non-lensed QSO
Detection of a variable stratified UFO with velocities 0.1c and 0.3c, extreme mass outflow rates, and kinetic powers of 1-10% of bolometric luminosity in quasar WISSH13 at z=3.294.
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An X-ray reverberation mass measurement of Cygnus X-1
X-ray reverberation lags are used to measure the mass of the stellar-mass black hole Cygnus X-1 for the first time.
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Fast Dynamical Modelling of Milky Way Globular Clusters -- I. Implications for Initial Cluster Densities
Milky Way globular clusters formed with initial half-mass densities of ~10^6.4 M_sun/pc^3, bottom-light IMFs, and small present-day black hole mass fractions, inferred by coupling rapid evolution models with multimass equilibrium models fitted to present-day observations.
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An Acceleration is Worth a Hundred Thousand Phase Space Measurements
One acceleration measurement equals ~10^5 phase-space measurements for local dark matter density estimation, with acceleration outperforming Jeans modeling in both equilibrium and perturbed Milky Way simulations.
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Dark Matter in Draco and Bo\"otes I: Hints of a Core in an Ultra-Faint Dwarf from Simulation-Based Inference
GraphNPE recovers a significantly lower central density for Boötes I consistent with a core while Draco remains marginally cuspy, and demonstrates that higher-order velocity moments reduce bias in dynamical modeling.
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Discovery of a quasi-periodic oscillation non-harmonically related to the Type-C QPO in the hard intermedidate state of MAXI J1820+070
Detection of a non-harmonic QPO precursor to Type-B in the HIMS of MAXI J1820+070 using NICER timing data.
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A Measurement of the Thermal and Ionization State of the IGM at $z < 0.5$
Low-redshift IGM measured to be extremely hot (T0 ≈ 28,000 K) and nearly isothermal at z=0.1, with Gamma_HI lower than UV-background models, possibly due to 15 km/s turbulence.
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Simulating realistic radio morphologies of Fanaroff-Riley I jets in a self-regulating cool-core cluster
Self-regulating AGN jets in MHD simulations of cool-core clusters yield realistic FRI radio morphologies viewed along the jet axis and account for frequency-independent lobe extents via 1-50 μG fields allowing both young and old electrons to radiate.
-
Accretion of Primordial Black Holes in Stellar Interiors
Self-consistent spherical accretion simulations show cooling-enhanced growth of PBHs with radiative efficiency ~10^{-2} in the bremsstrahlung regime, yielding a critical seed mass of ~10^{-16} M_sun to consume a solar-mass star in a Hubble time.
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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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The strength of Type-C quasi-periodic oscillations in black hole X-ray binaries correlates with the jet inclination
Type-C QPO amplitudes correlate linearly with jet inclination up to 8 Hz in BH LMXBs, lower on decay than rise, reproducible by precessing hot flow if misalignment ≥10-15°.
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Search for the Highest-energy Quasiperiodic Oscillation in the Black Hole X-Ray Binary Candidate Swift J1727.8-1613
First detection of QPOs above 250 keV in Swift J1727.8-1613 with up to 8.9 sigma significance, showing decreasing rms and increasing soft lags that suggest a geometric origin from small-scale jet precession.
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Bo\"otes III is a Tidally Disrupting Ultra-Faint Dwarf Galaxy on an Eccentric Polar Orbit
Boötes III has σ_v ≈ 1.7 km/s, a recent ~9.5 kpc pericenter on a polar eccentric orbit, and is actively tidally disrupting, with debris broadly consistent with the Styx stream.
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AGN radiative feedback as the main regulator of [O III] outflow activity and obscuration in X-ray AGN
AGN radiation pressure, not black-hole mass, simultaneously boosts large-scale [O III] outflows and clears circumnuclear gas as Eddington ratio rises.
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Compact Objects Merging with Stars as an Origin of Ultra-Long Gamma-Ray Bursts and Luminous Fast Blue Optical Transients
SN 2011kl is broadly consistent with an LFBOT light-curve model and ULGRB hosts match LFBOT/LGRB environments, supporting a shared He-CO merger progenitor for a subset of both classes.
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The disk luminosity deficit as a tracer of receding disk during Soft-to-Hard transitions in Black Hole X-ray Binaries
In 24 BHXRB outbursts, the thermal disk luminosity drops below the soft-state exponential decay baseline, and this deficit is used as a tracer of disk truncation, corroborated by decreasing timing frequencies.
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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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Hot or Cold? Radial Redistribution of Stars in FIRE Simulations of Milky Way-Mass Galaxies and the Asymmetry of Inward versus Outward Migrators
Simulations of Milky Way-mass galaxies reveal direction-dependent dynamical heating during stellar radial migration, with inward migrators heating, some cooling, and cold preservation uncommon especially for older stars.
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Global trends in morphology from massive to dwarf galaxies
Galaxies become less concentrated, more asymmetric and less clumpy toward lower stellar masses, with bar fraction declining to zero near 10^8 solar masses and CAS parameters losing separating power in the dwarf regime.
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The MASSIVE SURVEY XXI: Local Variations in the Stellar Initial Mass Function of MASSIVE Early-Type Galaxies
In 37 massive ETGs, the IMF becomes less bottom-heavy with radius, with average α_IMF falling from 2.16 to 1.74 and IMF gradients dominating M/L variations over stellar population effects.
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Feedback-Free Star Formation in Clusters within a Galaxy Simulated at High Resolution in Cosmic Dawn
High-resolution zoom-in simulation of a z~10 galaxy produces over 10^5 star clusters with scale-free mass function, 90% of star formation in clusters, global SFE 0.2-0.3, and reproduces JWST super-bright galaxies via feedback-free bursts.
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The Hubble Missing Globular Clusters Survey IV. Ultra-faint compact satellites of the Milky Way. The case of Koposov 2
Koposov 2 is an ancient, extremely metal-poor, compact stellar system best explained as a dissolving globular cluster, not a dwarf galaxy.
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The X-ray emission of the long-period transient and accreting cataclysmic variable ASKAP J174508.9-505149
X-ray timing and spectral analysis of ASKAP J174508.9-505149 detects matching periodicity and features consistent with an accreting magnetic CV.
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Guitar Nebula: extreme accelerator in extreme environment
The Guitar nebula's pulsar appears to accelerate electrons to within ~3/4 of the theoretical maximum potential, and its brightness is best explained by the pulsar crossing an old supernova remnant's compressed, magnetized shell.
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NEFERTITI: Linking early galaxy formation to the assembly of the Milky Way
NEFERTITI simulations show that the Milky Way's most metal-poor stars largely come from a handful of accreted massive dwarf galaxies, while reproducing the JWST Hebe galaxy at z~11 as a pure Population III system.
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Binary Evolution Can Mimic the Pair-Instability Mass Gap in Black Hole Mergers
Efficient mass transfer in binaries naturally limits the mass of the first-born black hole and produces a sharp drop above 45 solar masses that mimics the pair-instability gap.
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The GECKOS survey: Resolving the molecular and ionised gas in the galactic outflow of ESO~484-036
Multiphase observations show molecular gas mass loading factors 10 times higher than ionised gas in ESO 484-036, creating a 3.5 dex discrepancy with cosmological simulations that underpredict cold gas outflows.
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Investigating Extended Main-Sequence Turnoffs in Galactic Open Clusters
In low-extinction galactic open clusters fast and slow rotators populate distinct parts of the extended main-sequence turnoff while differential extinction inflates the turnoff width and biases age estimates in others.
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Possible evidence for a pair-instability supernova nature of ultra-early JWST sources
A pair-instability supernova from a 250-260 solar mass Population III star at z≈15 matches the brightness, variability, photometry, and spectrum of the JWST source Capotauro.
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Exploring the impact of AGN feedback model variations on the Lyman-$\alpha$ Forest Flux Power Spectrum
Varying AGN feedback parameters shows that jet feedback from the most massive black holes suppresses the Lyman-alpha forest P1D unless it reduces the number of such black holes.
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The Fraction of Clumpy Galaxies in JADES Over $2<z<9$
The clumpy-galaxy fraction rises from ~20% at z>6.5 to ~80% at z~2.75 in a 9,121-galaxy JWST sample, higher than HST-based values because JWST detects fainter clumps.
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First Results from the TNG50 Simulation: Galactic outflows driven by supernovae and black hole feedback
TNG50 shows galactic outflow mass loading is non-monotonic with stellar mass, rising rapidly above 10^10.5 Msun due to black hole feedback, and produces fast multi-phase outflows with emergent collimation.
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Deep far-UV observations of the ELAIS N1 field using AstroSat: Source catalogue, spectral energy distribution modelling and star formation
UVIT FUV catalogues of ELAIS N1 plus CIGALE SED fits show SFR increasing with redshift and a flat young-to-total stellar mass ratio to z≲0.76, consistent with secular SFMS evolution.
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A Census of the 200 Most Massive Galaxies Spectroscopically Observed with JWST at zspec $\sim$3-15
JWST prism spectroscopy of 200 massive galaxies at z~3-15 shows normal star-forming galaxies dominate at z>6 while dusty systems and quiescent galaxies increase at lower redshift, with evidence for multiple quenching pathways.
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Wrinkles in Time. II. Stellar Age Trends in Kinematic Signatures from Transient Spiral Structure
Simulations show Lindblad-resonance wrinkles from non-winding spirals are filled with zero-age stars on orbits normally occupied by much older populations, offering an age-based constraint on past transient spiral patterns.
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Revised orbital parameters of the gamma2 Velorum system
New interferometry revises gamma2 Velorum eccentricity to 0.322 and yields masses/radii that constrain evolutionary tracks but confirm the mass-discrepancy problem.
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Constraints on Binarity for the Extreme Oe Variable Star AzV 493
Chandra non-detection and heterogeneous RV data leave AzV 493's putative highly eccentric companion unconfirmed, with only L_X < 2.5e33 erg/s and conditional mass lower limits if RV variations are real.
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Deep Newtonian Afterglows: Theoretical Light Curves for Quasi-spherical Outflows
An analytical model for multiwavelength synchrotron emission from decelerated quasi-spherical ejecta with energy injection in stratified environments is developed for the deep Newtonian regime of GRB afterglows.
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Constraints on the Gas Geometry Surrounding Little Red Dots through Narrow-Line Diagnostics
Narrow-line diagnostics on ~20 LRDs indicate that stellar photoionization alone cannot explain the observed ratios in many objects, implying anisotropic ionizing radiation from complex gas geometry.
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Neutron Star Mass-Radius Constraints for EXO 0748$-$676 from 2008-2025 Quiescent X-ray Spectra
Joint MCMC analysis of Chandra and XMM-Newton quiescent spectra yields M = 1.77^{+0.17}_{-0.22} M_⊙ and R = 12.62^{+0.56}_{-0.74} km at 7.1 kpc, with conservative ranges 1.41-2.11 M_⊙ and 10.15-15.13 km when distance uncertainty is included.
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A Log-Uniform Initial Magnetic Field Distribution Explains Pulsar and Magnetar Populations through Magnetic Inclination Alignment
Magnetic inclination alignment with timescale proportional to B to the minus two suppresses observed numbers of strong-field neutron stars, unifying pulsars and magnetars under one log-uniform initial B distribution.
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An atypical X-ray variability component in the black hole candidate AT2019wey
Detection of an imaginary QPO in AT2019wey whose frequency drops from ~5 Hz to ~1 Hz with rising phase lags as the source transitions through HIMS and LHS, showing U-shaped phase-lag spectrum in HIMS.
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The effect of near-core mixing on rejuvenation and the asteroseismic properties of massive accretors
1D models show convective boundary mixing dominates the asteroseismic imprint of accretion in massive stars, robust to semiconvection changes but drastically altered without it, with thermal relaxation as key.
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Feedback in Extragalactic Star Clusters (FEAST): Spectral Energy Distributions and the Physical Properties of Star Clusters in NGC 628 with CIGALE
SED fitting of star clusters in NGC 628 identifies an evolutionary sequence from embedded young clusters to visible ones with a photo-dissociation region clearing timescale of approximately 4 Myr.
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The Light Curve of Wind-Reprocessed Tidal Disruption Events
Radiation hydrodynamic simulations of wind-reprocessed TDEs reveal a ~3-week offset between optical/UV and bolometric light curve peaks due to the buildup time of the reprocessing layer.
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A Colour-colour Fingerprint Links the UV Upturn in Early-type Galaxies to Second-generation Stars from Dissolved Globular Clusters
HST photometry reveals radial color gradients in two ETGs that match predictions from the multiple-population scenario linking the UV upturn to second-generation stars from dissolved globular clusters.
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The impact of source and survey modelling on the connection between [O III] emitters and Ly $\alpha$ forest transmission at z ~ 6
Empirical halo-to-[O III] emitter modeling with realistic JWST survey mocks produces cross-correlations consistent with z~6 data within large scatter, but with a ~10 cMpc offset in the 1D peak.
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Magnetic Configuration Imprints on Quasi-Periodic Variability in GRMHD Simulations of Thin Accretion Disks
Simulations show magnetic field configurations set truncation radii and resonant cavities that produce QPO frequencies in thin disks matching black hole X-ray binary observations.
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GMRT Survey of Radio Emission from Magnetic Massive Stars -- I: Emission from Single Stars at sub-GHz Frequencies
GMRT sub-GHz survey of 44 magnetic hot stars detects emission in 11 cases and finds scaling of radio luminosity with magnetic field and rotation period consistent with higher-frequency work.
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Strong X-ray Variability of I Zwicky 1: Obscuration from Clumpy Accretion-Disk Winds
Variable column density and covering factor of three ionized absorbers in clumpy disk winds explain the X-ray variability in I Zw 1 with stable corona.