1176 papers
Astro-Ph EP explores the dynamic physics of the early universe, investigating how the cosmos evolved from its initial moments into the vast structure we observe today. This field tackles profound questions about cosmic inflation, the formation of the first stars, and the mysterious nature of dark matter and dark energy that shape our reality. It is where theoretical models meet observational data to rewrite our understanding of cosmic history.
At Gist.Science, we process every new preprint in this category directly from arXiv, ensuring you have immediate access to the latest breakthroughs. Our team provides both plain-language explanations for broad understanding and detailed technical summaries for researchers, bridging the gap between complex astrophysics and accessible knowledge.
Below are the latest papers in Astro-Ph EP, offering fresh insights into the origins and evolution of our universe.
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.
By conducting a uniform search for nearby transiting companions in the first five years of TESS data, this study establishes a lower-limit occurrence rate of approximately 7.6% for such companions around hot Jupiters, providing critical constraints on the relative efficiency of disk migration versus high-eccentricity migration pathways while suggesting potential slight misalignments between hot Jupiters and their neighbors.
This paper analyzes the orientation of 326 Amazonian geoglyphs using remote sensing and archaeoastronomy, revealing a non-random alignment that indicates their builders possessed a significant interest in the Sun's annual cycle.
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 paper reports the detection of time-variable helium escaping from the atmosphere of the habitable-zone rocky exoplanet LHS 1140b, suggesting a helium-dominated upper atmosphere with trapped volatiles, while no such signal was found for its smaller companion LHS 1140c.
This study demonstrates that residual habitable zone exozodiacal dust can significantly bias the characterization of exoEarths by mimicking cloud-like continuum emission that reduces the apparent depth of molecular absorption features, necessitating rigorous post-processing or alternative detection strategies to accurately assess habitability with future observatories like the Habitable Worlds Observatory.
This paper outlines an observational campaign encouraging both professional and amateur astronomers to monitor the anticipated August 5, 2026, impact of a spent Falcon 9 upper stage on the Moon's sunlit eastern limb, aiming to capture the event in real-time for studies on impact dynamics, plume behavior, and future seismic localization.
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.