Specialty
A small Subaru study identifies one CEMP-s star with the highest magnesium-to-iron ratio reported for a turn-off star of its kind, while its binary origin and Galactic membership remain unresolved.
Scientific publication4 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
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
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 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
The preprint reports that LY UMa was bluer during the brighter of two B and V observing runs and estimates a K7-K8V mass donor using distance and assumed light-share calculations. It also gives a single V-band estimate for nearby Mrk 153.
Scientific publication4 min read
A multi-wavelength case study of NOAA active region 12297 records recurrent brightenings along a fishbone-like solar magnetic structure and interprets their motion as sequential reconnection, while acknowledging that direct node-to-node triggering was not observed.
Scientific publication4 min read
A new computational study finds that circumbinary-disc interaction can match the observed eccentricities of stripped giant binaries only under demanding assumptions, while failing to explain most short post-AGB periods.
Scientific publication4 min read
High-resolution infrared spectra suggest TRAPPIST-1 has broadly solar-like chemistry, while its carbon isotope ratio is higher than the solar-system value.
Scientific publication4 min read
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