Subject
Stars, planets, galaxies, cosmology, missions, and space observations.
Researchers found a linked set of thermal, motion and magnetic-topology signatures in a selected solar brightening. The authors describe the pattern as consistent with reconnection involving a twisted magnetic structure, but not as proof that reconnection occurred.
Scientific publication5 min read
A modeling study tests whether machine learning can estimate how strong an ongoing solar flare will become, finding larger errors and lower uncertainty coverage for stronger events.
Scientific publication3 min read
An arXiv preprint reports that the apparent unevenness in fast radio burst positions is compatible with isotropy after Galactic masking and survey-specific selection functions are applied. The authors warn that a correction learned from the observed sky could also absorb genuine anisotropy aligned with a survey footprint.
Scientific publication3 min read
A numerical preprint reports that nonperturbative lattice evolution changes predicted scalar-induced gravitational-wave spectra in the high-amplitude part of a selected inflation model. The result also shifts the model comparison with selected NANOGrav pulsar-timing data, but remains bounded by a finite scan, finite lattice and chosen inference assumptions.
Scientific publication3 min read
An arXiv preprint describes SPT-3G+, a planned receiver for the 10-meter South Pole Telescope. Its model-based forecasts cover cosmic microwave background mapping, lensing, delensing, galaxy clusters and transient monitoring, but no deployed-instrument results are reported.
Scientific publication6 min read
A version 1 arXiv preprint describes SPT-3G+, a planned South Pole Telescope receiver with modeled cooling margin and a projected mapping speed nearly an order of magnitude above current SPT-3G.
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 theoretical preprint models a brief, unusual phase in a subdominant dark-matter component. The calculation predicts more high-redshift halos and lower fitted star-formation efficiency, but the combined cosmological data do not significantly favor the model over ΛCDM.
Scientific publication4 min read
An arXiv preprint explores warm inflation in two related descriptions of gravity. It reports that the Einstein-frame effective dissipation ratio can be smaller, allowing high-temperature cases that are strongly dissipative in the defining frame to retain quantum-dominated scalar perturbations.
Scientific publication4 min read
An arXiv methods preprint says comparing radial and transverse BAO measurements can expose a constant calibration offset that transverse-only fits cannot see. It reports a 5.4% difference between two SDSS transverse catalogues and unusually large scatter in the MM compilation, while interpreting the pattern as a calibration and error-model problem rather than new physics.
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
A laboratory experiment reports pairs of attosecond soft-X-ray pulses with adjustable timing and evidence that their relative phase could be tuned. The study characterizes the light source and its diagnostics; it does not report a direct molecular or quantum-system control experiment.
Scientific publication3 min read