Specialty
A study of the quasar PDS 456 links changes around 1 keV to a patchy, low-ionization ultrafast outflow crossing the X-ray-emitting region. Under that geometric interpretation, the wind lies well beyond a separately estimated high-ionization phase, narrowing the leading explanations for how it was accelerated.
Scientific publication5 min read
A theoretical preprint models steady spherical accretion onto a static Konoplya-Zhidenko black hole and reports different transonic locations for different idealized fluid choices.
Scientific publication4 min read
A small observational study of blue field candidates confirmed nine ultra-diffuse galaxies and eight other low-surface-brightness galaxies. After an aperture correction, all targets were described as lying within the star-forming main sequence, although the corrected star-formation rates were treated as upper limits.
Scientific publication4 min read
ALMA observations show a highly collimated, chemically stratified jet whose shape and velocity pattern fit a disk-wind interpretation better than an X-wind model.
Scientific publication4 min read
A new deep, multi-epoch VISTA dataset covers about 2.5 million detections in the central Large and Small Magellanic Clouds, with preliminary signs that it may improve motion studies and reveal central structure.
Scientific publication5 min read
A two-object follow-up study identifies J0109–5424 as a z = 2.07 FeLoBAL quasar and does not favor lensing for P170+20.
Scientific publication4 min read
A simulation analysis found the strongest reported galaxy bias in node outskirts and a decline in mean bias from short to long filaments.
Scientific publication3 min read
A model-based analysis of 40 selected gamma-ray bursts found mostly small inferred off-axis ratios, with no significant difference between its ISM and wind groups or between bursts with and without X-ray plateaus.
Scientific publication4 min read
A fiducial MACER simulation suggests that weak short-term links between AGN brightness and host-galaxy gas can coexist with long-term depletion and star-formation quenching.
Scientific publication4 min read
A theoretical study finds that Lense-Thirring precession is essential to stationary orbital arrangements around a spinning black hole, while most modeled equilibria are unstable.
Scientific publication3 min read
A model of the compact source Punctum finds that a primordial black hole with a dark-matter spike could fit its reported millimeter emission, polarization and size, but the calculation does not confirm that interpretation.
Scientific publication4 min read
Infrared tests on porous amorphous solid water found a shared spectral restructuring pattern across three vibrational modes, but the accompanying water-desorption signal differed among wavelengths.
Scientific publication4 min read
An observational preprint of NGC 4438 finds that bulk motion dominates the estimated energy in its compact nuclear bubbles, while a larger outflow has comparable thermal and magnetic support. Different power-estimation methods also produce sharply different results.
Scientific publication4 min read
A model of lobed AGN feedback places the strongest time-averaged heating near the central few kiloparsecs. It finds modeled heating-cooling balance in seven of ten mock clusters, but cooling still exceeds AGN heating above 100 kiloparsecs in seven cases.
Scientific publication3 min read
The preprint models lower deflection for rays inside an extended dark-matter halo than for an equal-total-mass point lens, while a confined core has no distinguishable exterior lensing signature.
Scientific publication4 min read
A survey of the Milky Way's Central Molecular Zone found a consistent association between lower SiO emission ratios and a measure combining each cloud's average density with its dynamical time.
Scientific publication4 min read
A wavelet-based method separated Galactic dust from cosmic infrared background anisotropies in three Planck sky patches, including a low-signal region, while preserving the contamination statistics used to test the result.
Scientific publication5 min read
A model-based analysis of 251,462 star-forming galaxies finds a mildly super-linear low-mass main sequence and a better match to the observed flattening of the low-mass galaxy stellar mass function.
Scientific publication4 min read
A study of 5,124 massive galaxies found 247 spiral galaxies with quenched central cores whose properties resembled quenched early-type systems. The authors say the pattern supports a possible rebuilding of spiral disks around older centers, although the data do not follow any galaxy through that change.
Scientific publication4 min read
A modeling study of synthetic MeerKAT data reports higher simulated chances of resolving a single supermassive black-hole binary when timing precision and cadence are improved.
Scientific publication4 min read
A single GRMHD model showed intermittent, flux-linked jets: dipole-dominated high-flux states were associated with efficient outflows, while mixed low-flux states had suppressed jets.
Scientific publication4 min read
A modeling study reports that AGB gas formed disk-like reservoirs around intermediate-mass black holes in some compact stellar-system models, while the modeled black holes themselves were not allowed to grow.
Scientific publication4 min read
A modelling preprint tests HCm v6.2 on AGN optical spectra. It finds close agreement with direct ionic measurements, but modelled total sulphur is about 0.3 dex higher than correction-based values, while LINER results change with the assumed ionising spectrum.
Scientific publication4 min read
A model-based analysis of about 365 hours of H.E.S.S. observations finds significant curvature in the Galactic Center ridge gamma-ray spectrum and places the preferred cosmic-ray injection site near Sgr A*. Several competing spectral shapes fit equally well, so the result narrows the possibilities without settling the spectrum’s exact form.
Scientific publication5 min read
In ten hydrodynamical simulations, spin-dependent feedback winds were linked to lower accretion, disrupted minidiscs, stalled orbital expansion and persistent spin misalignment.
Scientific publication3 min read
A spatially resolved study of REBELS-25 at redshift 7.31 finds a common rotating structure in ionised and neutral gas, alongside clumpy ultraviolet and optical light, compact dust emission and heavily obscured star formation.
Scientific publication5 min read
Two simulations suggest that strong guide fields are associated with intermittent charge-starved structures and particle-energy statistics unlike a power law, while the proposed mechanism remains model-based.
Scientific publication4 min read
A preprint analysis of seven lensed quasars reports a 13.3-light-day characteristic source size at 5007 Å and a wavelength-size slope below the thin-disk prediction, with results conditional on microlensing assumptions.
Scientific publication3 min read
A preprint on PolarBERT reports a rich set of detector-related signals in the model representation and lower median angular errors from uncertainty-head selection than from total-charge selection at two tested efficiencies. The event-level uncertainty output, however, was not globally calibrated.
Scientific publication4 min read
A model-based comparison of three-dimensional dust and H I absorption places some neutral structures along four pulsar sightlines beyond the Local Bubble, while showing where component matching becomes unreliable.
Scientific publication4 min read
An AI detector revisited galaxies rejected by GOTHIC and produced 29,605 possible paired-nucleus candidates, but their true status remains unconfirmed.
Scientific publication4 min read
A laboratory study reports the first measured infrared absorption spectrum of naphthalene in its lowest triplet state. The spectrum differs from the singlet ground-state pattern and is closely reproduced by anharmonic calculations, while the astronomical comparison remains a model rather than a direct detection.
Scientific publication4 min read
A data-driven simulation tied to the T21 arc-light distribution found that flux-weighted coordinates recovered an input neutral-hydrogen profile more closely than geometric spaxel centres.
Scientific publication5 min read
An analysis of J0011+3443 finds a compact two-sided radio structure and a peaked spectrum consistent with a GPS-class compact symmetric object, while leaving lensing and dual-AGN explanations unresolved.
Scientific publication3 min read
An arXiv preprint analysis of selected star-forming MaNGA regions and galaxies found no statistically significant secondary dependence of gas-phase metallicity on local or total star-formation activity after accounting for stellar mass. The result is tied to the calibration and samples used.
Scientific publication4 min read
A model built from young-cluster trajectories suggests that star formation near the Sun came in bursts, followed by a smoother pattern of core-collapse supernovae. The inferred events are concentrated in several nearby regions, but the absolute rates depend on which stars and clusters the catalogues capture.
Scientific publication3 min read
A new arXiv preprint reports that three of four high-redshift candidates initially identified as extremely metal-poor galaxies had very dense high-ionization gas. Accounting for that density produced higher metallicity estimates and led the authors to classify them as possible EMPG impostors, while stressing that the result is limited to four selected objects.
Scientific publication6 min read