1669 papers
Astro-Ph — Sr explores the fascinating realm of stellar astrophysics, focusing on how stars are born, evolve, and eventually meet their dramatic ends. This field deciphers the life cycles of our cosmic neighbors, from the gentle glow of newborn suns to the explosive power of supernovae and the mysterious depths of black holes. It helps us understand the fundamental forces shaping the universe we inhabit.
Every new preprint in this category arrives directly from arXiv, where researchers share their latest discoveries before formal publication. At Gist.Science, we process each of these fresh uploads to provide both clear, plain-language explanations for curious minds and detailed technical summaries for experts. This dual approach ensures that breakthroughs in stellar science are accessible to everyone.
Below are the latest papers in stellar astrophysics, featuring the most recent insights shared by the global research community.
This paper argues that the observed saturation of Earth's response to extreme solar wind driving is not a physical limit but a statistical artifact caused by regression to the mean due to measurement uncertainties, implying that the true impact of extreme geomagnetic storms is actually linear and potentially twice as large as previously believed.
This paper analytically solves the long-term octupole evolution of librating Kozai-Lidov cycles in hierarchical three-body systems, demonstrating that their previously unsolved slow dynamics are governed by a simple pendulum model that predicts orbital flips and slow oscillations of angular momentum on extended timescales.
This study analyzes 12 highly metal-rich white dwarfs from DESI Data Release 1 to determine the compositions of accreted exoplanetary debris, revealing that most parent bodies resemble dry inner Solar System materials while a few appear water-rich, thereby establishing DESI as a powerful tool for identifying and characterizing metal-rich exoplanetary systems.
This study employs Markov Chain Monte Carlo modeling of the Swift J1834.9-0846/W41 region's broadband spectrum to demonstrate that lepto-hadronic scenarios, particularly a two-component model where hadronic interactions dominate the extended W41 emission and a magnetar wind nebula powers the central TeV excess, provide a physically consistent explanation for the non-thermal emission that purely leptonic models cannot.
This paper confirms the existence of a MOND-type gravitational anomaly in wide binary stars at low accelerations by demonstrating that rigorous data quality control and realistic modeling of multiple-star systems cannot eliminate the observed deviation from standard gravity, attributing conflicting previous results to calibration biases, unaccounted selection effects, or insufficient statistics.
This study analyzes a volume-complete sample of OB stars within 1 kpc of the Sun to determine runaway star probabilities, finding that approximately 17.5% of O-type and 6.9% of B-type stars are runaways based on a fixed velocity threshold, a result consistent with previous research but influenced by sample selection and methodology.
This study attributes the extreme CME productivity of solar active region 13664/8 to the rapid emergence of complex magnetic flux that created multiple collisional polarity inversion lines, which, combined with low critical decay heights, facilitated both recurrent and disturbance-triggered eruptions.
This paper presents the design of DUET, a dual-channel imager for the SPECULOOS-Southern Observatory that utilizes a dichroic beamsplitter to simultaneously capture visible and near-infrared light with optimized filters, enabling precise detection of transiting terrestrial exoplanets around ultra-cool dwarfs while mitigating atmospheric water vapor noise.
Hydrodynamical simulations reveal that while circumstellar discs in binary systems support dust growth comparable to isolated discs, tidal perturbations from the inner binary in circumbinary discs significantly inhibit dust settling and growth, thereby hindering in situ planet formation for wide binaries.
By analyzing 773 open clusters, this study reveals that while binary fractions are largely independent of cluster age and evolution, they exhibit an anticorrelation with metallicity and show that binary systems are preferentially concentrated in cluster centers with mass ratios decreasing toward the outskirts, suggesting that multiplicity is primarily established during early formation rather than shaped by subsequent dynamical evolution.