2283 papers
Astro-Ph — He explores the dynamic lives of stars, from their fiery births in cosmic clouds to their dramatic deaths as supernovae or quiet fades into white dwarfs. This field helps us understand the chemical evolution of our universe and the physical processes that power the night sky, offering a window into the life cycles of the objects that dot our galaxy.
At Gist.Science, we process every new preprint in this category directly from arXiv, ensuring you stay ahead of the curve without needing to decode dense academic jargon. For each submission, we provide both a clear, plain-language overview for the curious mind and a detailed technical summary for researchers who need the full depth of the findings.
Below are the latest papers in stellar astrophysics, carefully selected and summarized to help you grasp the newest discoveries in how stars are born, evolve, and die.
This paper proposes that hierarchical black hole mergers like GW231123 naturally occur in nuclear star clusters through a combined channel of binary-single interactions and secular evolution driven by a central supermassive black hole, predicting a concurrent population of observable black hole-star binaries.
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 paper presents ultra-long 2D3V PIC simulations of unmagnetized relativistic pair shocks in a front-comoving frame, providing strong evidence for a steady downstream state characterized by soliton-like magnetic structures and limited Fermi acceleration, while confirming that true power-law tails do not form.
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 presents significant advancements to the CRESCENDO spectral cosmic-ray solver in OpenGadget3, including improved energy loss calculations, realistic supernova seeding models, and the removal of ultra-relativistic approximations, to enable more accurate and observationally verifiable simulations of cosmic-ray impacts on galaxy evolution.
Motivated by the 2025 Wake Forest workshop, this paper proposes a practical framework comprising three principles—detectability, uniqueness, and robustness—to evaluate the reliability of black hole spin measurements derived from X-ray reflection spectroscopy and to establish community standards for future high-precision X-ray astronomy.
By applying -machine reconstruction to the waiting-time sequences of three repeating fast radio bursts, this study reveals that FRB 20121102A and FRB 20201124A exhibit non-random, structured temporal memory governed by hidden activity-rate states spanning hours to weeks, whereas FRB 20220912A appears consistent with memoryless emission.
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 paper presents multi-wavelength observations of the tidal disruption event 2024aepd, revealing an early near-infrared excess likely caused by free-free emission from a reprocessing photospheric envelope and a rapid spectral evolution from a thermal disk to a hard power-law dominated by a strengthening corona within the first 300 days.
This paper proposes a self-consistent single-fluid relativistic mean-field framework for dark matter-admixed neutron stars using a Higgs-portal model with a massive mediator, demonstrating how the resulting repulsive interaction dynamically couples baryonic and dark matter sectors to systematically soften the equation of state, reduce maximum stellar mass, and establish a direct link between collider-motivated WIMP models and multimessenger astrophysical constraints.