Subject
Stars, planets, galaxies, cosmology, missions, and space observations.
A study of BL Lacertae found significant gamma-ray changes on hour-long timescales, while evidence for faster variability remained marginal and model-dependent.
Scientific publication4 min read
A three-dimensional neural network inferred averaged cosmological quantities from present-day simulated matter maps, including parameters linked to curvature and backreaction. Its predictions tracked the simulations closely, but the study is only a proof of principle because the training data were too simplified for sensible use on observations.
Scientific publication4 min read
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 long-running spectroscopic record of Rho Leo found a persistent 16.46-day rhythm, while TESS data suggested a less secure 33-day brightness cycle.
Scientific publication4 min read
A combined analysis of spectra, light curves and eclipse timings places the three systems at different stages of contact-binary evolution, with ZZ PsA closest to instability.
Scientific publication4 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
An analysis of 11 extremely low mass ratio contact binaries found that two systems changed their out-of-eclipse brightness asymmetry within one TESS sector. It also found mixed orbital-period changes and evolutionary tracks that could not reproduce the shortest-period targets under the tested assumptions.
Scientific publication4 min read
A chirped femtosecond-laser system produced a measurable broadband heterodyne signal in a single-channel laboratory test, while projected multiplexed sensitivity remains untested.
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 preprint reports completed internal tests and modeled targets for PLACID, while the instrument's contrast performance and first science still await on-sky commissioning.
Scientific publication4 min read
A seven-star comparison found a sharp contrast between two ways of selecting slowly rotating, chemically peculiar A-type stars for magnetic-field searches.
Scientific publication3 min read
A cosmology preprint reports overwhelming statistical support for GPAge expansion histories after CMB distances are included, while stressing that the fitted pattern still needs fuller tests.
Scientific publication3 min read
A two-specimen proof of concept reconstructed three-dimensional fluorescence volumes and paired them with structural phase-contrast tomography under the same geometry.
Scientific publication4 min read
A preprint analyzing seven years of Van Allen Probes data reports that outer-belt electron flux was far higher during high-Alfvénicity solar wind, with seasonal coherence strongest near solar minimum. The observational result points to a possible role for magnetic fluctuations but does not establish causation or show that it applies beyond solar cycle 24.
Scientific publication4 min read
A numerical preprint finds that only one modeled condition with unscaled JWST telemetry reaches the 10−10 raw-contrast target, while a tenfold motion reduction succeeds under idealized assumptions.
Scientific publication5 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 modeling study finds that assumed magma composition and condensate chemistry can sharply alter predicted sub-Neptune atmospheres, sizes and spectra, but the results remain conditional on unverified chemistry and simplified planetary physics.
Scientific publication5 min read
A modeled Venusian moon survives for up to 4.5 billion years in some scenarios but is destroyed in others, leaving a narrow, model-sensitive survival window.
Scientific publication5 min read
A topology-based simulation test distinguished collisionless and self-interacting dark matter around massive halos, but the contrast faded on larger scales.
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
An engineering case study of Chile's 4.1-m SOAR telescope finds a 50-Hz optical-axis wobble that blurs speckle data, while the vibration's source and disappearance after 2020 remain unresolved.
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 preprint describes a deterministic pipeline that improves the signal-to-noise of faint Jovian radio emissions in Parker Solar Probe archives, compares its patterns with Stokes V data, and screens likely events without becoming a definitive detector.
Scientific publication5 min read
Prime-Cam met its laboratory deployment requirements and shipped with its first two modules, but its projected survey advantage still awaits telescope testing.
Proc. SPIE 14156, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XIII, 1415604 (20 Aug 2026)5 min read
A preprint describes a browser-based tool for extracting TESS full-frame light curves and reports 86.3% period agreement in a periodic subset, versus 58.8% across a heterogeneous sample, with caveats about crowding and magnitude calibration.
Scientific publication4 min read
A preprint modeling study of a hypothetical 10 TeV gamma-gamma collider finds a trade-off between total collision yield and a narrower high-energy peak.
Scientific publication4 min read
The model recovered 70% of labeled likely young stars and added 14,426 candidates, but recall ranged from almost 100% in M dwarfs to about 0% in O-type stars.
Scientific publication4 min read
A small study of 55 Cnc finds that Hubble's STIS can produce highly stable scanned spectra for exoplanet transit work, while showing why the reddest wavelengths remain difficult to interpret.
Scientific publication4 min read
An arXiv preprint describes TOI-4468 as a hot-Jupiter system with a validated outer planet and a separate, unconfirmed signal that may be a distant giant.
Scientific publication4 min read
A methods preprint proposes choosing the redshift where the dark-energy equation of state sits farthest from w = −1 relative to its uncertainty, and its illustrative application gives a higher one-dimensional significance than the pivot.
Scientific publication3 min read
FAST observations of two bright 2024 comets found contrasting 18-centimeter OH signals, with model-derived production estimates and a tentative satellite-line identification in A3.
Scientific publication4 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
The study reports a 98.0% pure muon mode with a spatial spread of about 15 millimetres, while measurements across 12 configurations showed a consistent trade-off between intensity and hadron contamination.
Scientific publication4 min read
An analysis of 225 Rowan et al. (2023) candidates with two eclipsing periods reports 76 confirmed blends and a 33.8% false-positive fraction for the examined set.
2025MNRAS.544L.174Z3 min read
A short VLA observing run on the single star AU Mic found strong variability even during selected quiet intervals, along with two clear flares. The authors interpret the pattern as evidence that many small, unresolved flares may help sustain the star’s radio emission, but the result is based on one star at one epoch.
Scientific publication4 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
A targeted optical search of nine unusual eclipsing candidates reported at least four magnetic white dwarfs, including three likely wind-accreting pre-polars and one normal polar, while other classifications remained unclear.
Scientific publication3 min read