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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A changing-look AGN exhibits a rapid accretion-driven spectral transition with broad-line region temperatures of approximately 11,800 K measured via Boltzmann plots and stable black hole mass estimates of 5 times 10 to the 7 solar masses across epochs.
A score-based diffusion generative model on deep infrared galaxy photometry yields a star formation rate density peaking at z=1.3 and shows distinct non-parametric star formation histories plus AGN activity peaking during the quenching transition of massive galaxies.
Calculation predicts ~60 lensed star transients per JWST pointing in the Cosmic Horseshoe, enabling spatial tests of dark matter and constraints on the stellar IMF.
High-resolution mapping reveals nitrogen enrichment around super star clusters in NGC 5253, attributed to Wolf-Rayet stars with material expelled to surrounding gas.
JWST spectroscopy of 295 galaxies at 5.5 < z < 14.3 shows UV slope beta reddening at z > 9.5, with lack of dust as the main driver of bluer values and nebular continuum at T > 15,000 K able to reproduce the observed range without dust.
Blind tests on simulated disc-wind BLR data show standard RM methods recover rotation but miss wind geometry and yield inconsistent velocity-delay maps despite good spectral fits.
3D CO5BOLD simulations show convective overshoot increases the fully mixed mass in DA white dwarfs by up to 2.5 orders of magnitude and shifts the convection onset temperature to 18000-18250 K.
Decomposition of CALIFA early-type galaxies shows star formation confined to discs compatible with the SFMS, with no molecular gas deficit in bulges relative to discs at fixed mass.
Discovery of 35 high-redshift dwarf galaxies with radio AGN showing jet powers of 10^42-10^44 erg/s and efficiencies >=10% in over half the sample.
The improved riddler framework with expanded training data across five explosion scenarios accurately recovers input parameters from unseen simulated spectra and is applied to fit real observations of SN 2011fe, SN 2005hk, and SN 2018byg.
3D simulations find that initial disc tilt and binary mass ratio determine preferential accretion onto the primary or secondary star, with polar discs showing the slowest mass loss.
The Gaia-Sausage-Enceladus merger occurred 11.2 ± 0.1 Gyr ago, coinciding with the formation of a group of globular clusters and potentially leaving ω Centauri as its remnant, while placing disk formation at z ≳ 4.
Paschen jumps in Little Red Dots indicate their continua originate from free-bound recombination emission in low-temperature nebular gas rather than thermalized or AGN components.
A Hubble-like sequence of galaxy morphologies exists by redshift 4, with low-mass galaxies as persistent star-forming disks and massive galaxies following either stable disk or rapid compaction-quenching paths.
In COLIBRE, today's galaxy morphology is set mostly by stellar mass: galaxies near M*≈1–2×10^10 M⊙ are the most disc-dominated, above ~2×10^11 M⊙ everything is spheroidal, and halo properties matter only weakly at fixed mass.
A new Gaia-based catalogue identifies 57 kinematically coherent OB associations within 1 kpc of the Sun, twice as many as previously known, and finds most are expanding.
Morphological metrics in galaxy images suffer systematic biases from resolution, depth, and noise that can be quantified and corrected empirically, with new metrics proposed to reduce those effects.
Observations of coronal rain downflows reveal preceding compressions, microflare-scale impact energy, hot rebound flows carrying under 15% of kinetic energy, and footpoint heating signatures matching TNE-TI cycles.
Order statistics reveal that the divergent variance in the 3D Holtsmark gravitational force distribution stems entirely from the first nearest neighbor.
Porous elongated dust grains exhibit decreasing intrinsic polarization with rising porosity and 90-degree polarization flips at specific wavelength-to-size ratios, enabling a new multi-wavelength method to constrain grain porosity in protoplanetary disks.
Four new FRBs discovered commensally during Parkes PTA pulsar observations, including one with record S/N and unusual spectrum; all highly polarized.
The paper delivers the first empirical masses and radii for the doubly-magnetic binary ε Lupi from combined photometry and radial velocities and classifies additional variability as g-mode pulsations of an SPB star.
A nonlinear short-wavelength approximation for eccentric waves in discs yields conditions for steepening of nonlinearity and eccentricity, with solutions bounded by linear WKB results.
citing papers explorer
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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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Tracing Active Galactic Nuclei Properties Through a Changing-look Event
A changing-look AGN exhibits a rapid accretion-driven spectral transition with broad-line region temperatures of approximately 11,800 K measured via Boltzmann plots and stable black hole mass estimates of 5 times 10 to the 7 solar masses across epochs.
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pop-cosmos: Star formation over 12 Gyr from generative modelling of a deep infrared-selected galaxy catalogue
A score-based diffusion generative model on deep infrared galaxy photometry yields a star formation rate density peaking at z=1.3 and shows distinct non-parametric star formation histories plus AGN activity peaking during the quenching transition of massive galaxies.
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Lensed stars in galaxy-galaxy strong lensing -- a JWST prediction for the Cosmic Horseshoe
Calculation predicts ~60 lensed star transients per JWST pointing in the Cosmic Horseshoe, enabling spatial tests of dark matter and constraints on the stellar IMF.
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The heart of NGC 5253 as seen with MUSE-NFM: nitrogen enrichment through stellar chemical feedback at parsec scales
High-resolution mapping reveals nitrogen enrichment around super star clusters in NGC 5253, attributed to Wolf-Rayet stars with material expelled to surrounding gas.
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Hitting the slopes: A spectroscopic view of UV continuum slopes of galaxies reveals a reddening at z > 9.5
JWST spectroscopy of 295 galaxies at 5.5 < z < 14.3 shows UV slope beta reddening at z > 9.5, with lack of dust as the main driver of bluer values and nebular continuum at T > 15,000 K able to reproduce the observed range without dust.
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Do Reverberation Mapping Analyses Provide an Accurate Picture of the Broad Line Region?
Blind tests on simulated disc-wind BLR data show standard RM methods recover rotation but miss wind geometry and yield inconsistent velocity-delay maps despite good spectral fits.
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Convective Overshoot and Macroscopic Diffusion in Pure-Hydrogen Atmosphere White Dwarfs
3D CO5BOLD simulations show convective overshoot increases the fully mixed mass in DA white dwarfs by up to 2.5 orders of magnitude and shifts the convection onset temperature to 18000-18250 K.
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Star-formation in CALIFA early-type galaxies. A matter of discs
Decomposition of CALIFA early-type galaxies shows star formation confined to discs compatible with the SFMS, with no molecular gas deficit in bulges relative to discs at fixed mass.
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Radio jets from AGN in dwarf galaxies in the COSMOS survey: mechanical feedback out to redshift $\sim$3.4
Discovery of 35 high-redshift dwarf galaxies with radio AGN showing jet powers of 10^42-10^44 erg/s and efficiencies >=10% in over half the sample.
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Quantitative modelling of type Ia supernovae spectral time series II: Exploring the diversity of thermonuclear explosion scenarios
The improved riddler framework with expanded training data across five explosion scenarios accurately recovers input parameters from unseen simulated spectra and is applied to fit real observations of SN 2011fe, SN 2005hk, and SN 2018byg.
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Misaligned circumbinary discs around unequal-mass eccentric binaries: alignment, morphology, and binary accretion variability
3D simulations find that initial disc tilt and binary mass ratio determine preferential accretion onto the primary or secondary star, with polar discs showing the slowest mass loss.
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The Last Galactic Firework: Timing the last significant merger with stars, globular clusters and $\omega$Centauri
The Gaia-Sausage-Enceladus merger occurred 11.2 ± 0.1 Gyr ago, coinciding with the formation of a group of globular clusters and potentially leaving ω Centauri as its remnant, while placing disk formation at z ≳ 4.
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Paschen Jumps in Little Red Dots: Evidence for Nebular Continua
Paschen jumps in Little Red Dots indicate their continua originate from free-bound recombination emission in low-temperature nebular gas rather than thermalized or AGN components.
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The Hubble sequence in JWST CEERS from unbiased galaxy morphologies
A Hubble-like sequence of galaxy morphologies exists by redshift 4, with low-mass galaxies as persistent star-forming disks and massive galaxies following either stable disk or rapid compaction-quenching paths.
-
The morphologies of present-day galaxies in the COLIBRE simulations
In COLIBRE, today's galaxy morphology is set mostly by stellar mass: galaxies near M*≈1–2×10^10 M⊙ are the most disc-dominated, above ~2×10^11 M⊙ everything is spheroidal, and halo properties matter only weakly at fixed mass.
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A new Gaia census of OB associations within 1 kpc
A new Gaia-based catalogue identifies 57 kinematically coherent OB associations within 1 kpc of the Sun, twice as many as previously known, and finds most are expanding.
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statmorph-lsst: Quantifying and correcting morphological biases in galaxy surveys
Morphological metrics in galaxy images suffer systematic biases from resolution, depth, and noise that can be quantified and corrected empirically, with new metrics proposed to reduce those effects.
-
Compression, Impact and Hot Rebound Flows from Coronal Rain Downflows
Observations of coronal rain downflows reveal preceding compressions, microflare-scale impact energy, hot rebound flows carrying under 15% of kinetic energy, and footpoint heating signatures matching TNE-TI cycles.
-
Statistical properties of the gravitational force through ordering statistics
Order statistics reveal that the divergent variance in the 3D Holtsmark gravitational force distribution stems entirely from the first nearest neighbor.
-
Intrinsic polarisation of elongated porous dust grains
Porous elongated dust grains exhibit decreasing intrinsic polarization with rising porosity and 90-degree polarization flips at specific wavelength-to-size ratios, enabling a new multi-wavelength method to constrain grain porosity in protoplanetary disks.
-
Commensal discovery of four Fast Radio Bursts during Parkes Pulsar Timing Array observations
Four new FRBs discovered commensally during Parkes PTA pulsar observations, including one with record S/N and unusual spectrum; all highly polarized.
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$\varepsilon$ Lupi: measuring the heartbeat of a doubly-magnetic massive binary with BRITE-Constellation
The paper delivers the first empirical masses and radii for the doubly-magnetic binary ε Lupi from combined photometry and radial velocities and classifies additional variability as g-mode pulsations of an SPB star.
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Focusing of nonlinear eccentric waves in astrophysical discs
A nonlinear short-wavelength approximation for eccentric waves in discs yields conditions for steepening of nonlinearity and eccentricity, with solutions bounded by linear WKB results.
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A public relativistic transfer function model for X-ray reverberation mapping of accreting black holes
A new public relativistic transfer-function model reltrans for X-ray reverberation mapping that fits both spectra and lags to measure black-hole masses.
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DINGO/GAMA /WAVES: HI-halo mass relation
The HI-halo mass relation follows a double power-law with turnover near 10^11.2 solar masses; centrals dominate the HI budget below ~6e12 solar masses while satellites dominate above, and photometric members boost high-mass halo HI by 1.5-3x.
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Spectral Evolution and Transient Broad-Line Features in the Isolated AGN UNAM-KIAS 613
Multi-epoch spectroscopy of UNAM-KIAS 613 shows transient double-peaked broad Hα emission interpreted as a one-time bipolar outflow in an isolated low-luminosity AGN with Eddington ratio ~0.03-0.04.
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A Theoretical Study of the Structure and Elemental Abundances of HD 20794
MESA grid models find HD 20794 is a 0.80 solar-mass star aged ~9 Gyr whose observed abundances match core-collapse supernova enrichment and are preserved over Gyr timescales.
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Quantitative modelling of type Ia supernovae spectral time series III: Implications for type Ia supernovae standardisation in cosmology
Two-thirds of the ZTF Type Ia supernova sample are best fit by sub-Chandrasekhar mass explosions, and mechanism-specific standardization reduces distance scatter.
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A Quasar--Companion System Without AGN Outflow at $z \sim 6$: The Case of PSO J083+11
New ALMA [C II] and FIR data on PSO J083+11 at z=6.34 reveal ordered rotation, typical star-forming ratios, and no outflow signatures in either galaxy, interpreted as a pre-AGN-feedback accretion phase.
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A universal relationship between the variability timescale and black hole mass in black hole jetted and non-jetted accreting systems
Mass-scaled DRW damping timescales in AGNs follow a linear relation with black hole mass (slope 0.35-0.50) for both jetted and non-jetted sources, supporting universal accretion physics.
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Stellar Population Characterisations in nearby, dusty Early-Type Galaxies
Most dusty early-type galaxies exhibit recent star formation components in their stellar populations, as revealed by spectral fitting of 15 nearby examples with a non-dusty control comparison.
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The PLATO Input Catalogue of targets (tPIC) for the first Long Pointing Field
tPIC2.2 supplies a list of 217,741 stars for PLATO's LOPS2 field, including 202,315 FGK dwarfs/subgiants and 15,037 M dwarfs with uniformly estimated temperatures, radii, and masses.
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Improved lanthanide constraints for the kilonova AT 2017gfo
More complete lanthanide line data in radiative transfer modeling requires a lanthanide mass fraction of only 2.5e-3 to match the observed spectrum of AT 2017gfo, twenty times below prior claims.
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Lagrangian versus Eulerian Methods for Toroidally-Magnetized Isothermal Disks
Lagrangian methods reproduce high-resolution Eulerian behavior for toroidally-magnetized disks and continue to lose flux at low resolution by following thin layers, unlike Eulerian methods that show no evolution.
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Steady-State or Not? The Evolution of Cosmic Ray Electron Spectra in Galaxies
Time-dependent cosmic ray electron spectra in a simulated galactic disk match steady-state solutions up to 500 GeV but become steeper and more disk-confined at higher energies due to recent injections.
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Nominal thresholds for good astrometric fits, and prospects for binary detectability, for the full extended Gaia mission
Nominal RUWE thresholds of 1.15 (DR4) and 1.11 (DR5) derived from Gaia Universe Model simulations increase detectable short-period binaries by 5-10% and long-period systems by 10-20%.
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DESI DR2 Galaxy Luminosity Functions
DESI DR2 yields galaxy luminosity functions showing non-power-law faint-end behavior and bright-end deviations, with good North-South agreement and reduced errors compared to GAMA.
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The Atacama Cosmology Telescope: stellar mass growth in massive galaxy clusters from DR5 over the past 7 billion years
Composite cluster stellar mass functions show marginal M* evolution at high z and a factor of 2.5 growth in stellar mass fraction from z=0.8 to 0.2 after accounting for halo mass growth.
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The HyLight model for hydrogen emission lines in simulated nebulae
HyLight is a new atomic model computing hydrogen recombination line emissivities from local physical conditions, matching Cloudy predictions to within 1% for typical photoionized nebulae.
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Cosmic dipole tensions: confronting the cosmic microwave background with infrared and radio populations of cosmological sources
Bayesian tension analysis shows Planck CMB dipole in >5σ disagreement with CatWISE infrared sources and moderate-to-strong disagreement with radio surveys NVSS and RACS, with evidence for shared astrophysical signals in some catalogs.
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Build-up and survival of the disc: From numerical models of galaxy formation to the Milky Way
Simulations show that observed rotation in 13.5-Gyr-old alpha-rich stars constrains the Gaia-Sausage-Enceladus merger to mass ratios below 1:4, with interaction and starburst times both near 11 Gyr.
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A method for statistical research on binary stars using radial velocities
DVCD is a new algorithm for binary star radial velocity analysis that is claimed to be 10,000-100,000 times faster than existing approaches and reveals decreasing binary fractions with lower log g and higher metallicity in APOGEE DR16 subsets.
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Self-consistent modelling of the Milky Way's Nuclear Stellar Disc
Axisymmetric self-consistent models fitted to NSD kinematic data yield a mass of 1.05 x 10^9 solar masses, radial scale length ~89 pc, vertical scale ~28 pc, and declining velocity dispersion.
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Are the observed gaps in protoplanetary discs caused by growing planets?
Simulations require 2000 Earth masses of pebbles to match observed disc gaps, but this produces mostly gas giants and few super-Earths, contradicting exoplanet data.
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Shiva: the dust destruction model
Shiva is a new simulation tool that computes time-dependent dust size distributions and band gap energy evolution for HAC grains under photo-processing, sputtering, and shattering in specified interstellar conditions.
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The "Red Radio Ring": Ionised and Molecular Gas in a Starburst/Active Galactic Nucleus at $z \sim 2.55$
Detection of [NII]205μm and CO lines plus SED analysis in the Red Radio Ring at z=2.55 shows co-spatial ionized and molecular gas, high column density after dust correction, and starburst-powered ISM.
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The impact of asymmetric neutrino emissions on nucleosynthesis in core-collapse supernovae
Asymmetric neutrino emissions produce proton-rich ejecta in one hemisphere and neutron-rich ejecta in the other, with asymmetries of 30% or more overproducing elements heavier than zinc relative to solar abundances.
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Star cluster formation from turbulent clumps. V. Stellar clustering around massive stars
N-body simulations show massive stars in TCCA clusters rapidly acquire triple or higher multiples and local density enhancements via dynamics, with multiplicity trends and shallower N_* profiles than competitive accretion models, matching AFGL 5180 better.
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The ubiquity of turbulence in the expanding kinematics of the ionized shells of Galactic planetary nebulae
Turbulence is ubiquitous in the ionized shells of Galactic planetary nebulae, with residual velocities transonic or slightly supersonic and larger in inner regions and [WR]-type central stars.