1092 papers
By using CRIRES+ near-infrared spectroscopy to detect strong CO absorption but no H in the edge-on debris disks of HD 110058 and HD 131488, the study establishes high CO/H ratios that rule out a primordial origin and strongly support an exocometary source for the gas.
This paper introduces ARTEMIDE, an open-source Mask R-CNN framework that successfully automates the detection and segmentation of strong gravitational lensing arcs in Euclid's Quick Data Release, achieving high precision and recall while demonstrating the viability of deep learning for analyzing massive wide-field survey datasets.
This paper demonstrates that the broad iron line feature observed in AGN X-ray spectra can be explained by a relativistic reflection model where a warm, dissipative corona above an accretion disk, illuminated by an external X-ray source, generates highly ionized iron lines that are significantly broadened and redshifted by strong gravity.
This paper presents a comprehensive photometric and spectroscopic analysis of the fast, linearly declining Type Ibn supernova SN 2024acyl, revealing that its properties are best explained by ejecta interacting with a helium-rich circumstellar medium originating from a low-mass helium star in an interacting binary system.
Using ALMA observations at a heliocentric distance of 2.1 au, this study characterizes the molecular composition and dust properties of comet C/2017 K2 (PanSTARRS) as it enters the water sublimation zone, revealing distinct production mechanisms for various volatiles and establishing an upper limit of 6.6 km for the nucleus diameter.
This study uses high-resolution, star-by-star cosmological simulations of an ultra-faint dwarf galaxy to demonstrate that while Type Ia supernova assumptions primarily dictate mean chemical abundances, massive star yields and stochastic sampling significantly shape abundance trends and limit the interpretability of single galaxies, underscoring the need to account for both systematic and statistical uncertainties in chemical enrichment modeling.
This paper introduces a Fourier-based inversion method that analyzes gravity-mode period spacing modulations to precisely locate and characterize internal buoyancy glitches in pulsating stars, thereby enabling rapid constraints on stellar age, composition gradients, and internal mixing processes.
This paper demonstrates that stochastic gravitational wave memory from early universe and astrophysical sources exhibits a fractional Brownian motion scaling ( with ) that grows faster than standard Brownian motion, offering a distinct signature to extract these signals from PTA data and probe post-Big Bang conditions.
This paper demonstrates high-power RF pulse shaping experiments using a digital-only Next Generation LLRF (NG-LLRF) platform and a Cool Copper Collider prototype, achieving peak powers up to 5.4 MW and validating the system's capability to perform complex modulations like phase reversal and beam loading compensation without additional analog components.
This paper introduces Synference, a fast and flexible Python framework that utilizes simulation-based inference to efficiently infer galaxy physical properties and photometric redshifts from multi-band photometry, achieving a ~1700-fold speedup over traditional methods while maintaining high accuracy and calibration.
This study demonstrates that the mass of a central supermassive black hole and a planet's distance from the galactic center critically determine exoplanet habitability by driving atmospheric heating, mass loss, and severe ozone depletion, particularly through energy-driven winds from active galactic nuclei.
By combining high-resolution spectroscopy from the Seimei telescope with continuous TESS photometry, this study demonstrates that the integrated Doppler imaging and light curve inversion method significantly improves the accuracy of reconstructing surface spot distributions and flare origins on the pre-main-sequence star PW And, particularly resolving features at low latitudes and in the southern hemisphere that are poorly constrained by spectroscopy alone.
This paper evaluates the detectability of the 3.46 cm helium line for tracing helium reionization using hydrodynamical simulations and forecasts, concluding that while current facilities struggle to distinguish reionization scenarios due to signal faintness and instrumental noise, next-generation high-sensitivity surveys like PUMA could achieve meaningful constraints within reasonable integration times.
This paper presents a new single-pulse search pipeline and associated software toolkits (FRBfaker and RFIbye) for the northern High Time Resolution Universe survey, demonstrating its readiness for full data processing through FRB-mimicking simulations and the detection of known pulsars, a RRAT, and numerous new single-pulse candidates.
This paper proposes and experimentally validates a novel "Phase-Modulated-sideband × Phase-Modulated-sideband Wave Front Sensing" (PMPMWFS) technique for gravitational-wave detectors, which demodulates signals at the difference frequency between two anti-resonant sidebands to effectively decouple Power Recycling Cavity and incident beam alignment from arm cavity signals, thereby enabling stable, multi-degree-of-freedom control.
Using a comprehensive dataset of 897 pulsars and a robust Bayesian framework, this study overturns the long-held consensus that pulsar radio spectra are predominantly simple power laws, revealing instead that complex curved or broken spectral shapes are the norm and that previous findings were largely statistical artifacts.
This paper presents an updated model-independent analysis of spatial curvature and cosmic ladder calibration using DESY5, DESI, and cosmic chronometer data, finding a mild tension with a flat universe while forecasting that future surveys like LSST and Euclid could significantly improve constraints on key cosmological parameters and resolve the Hubble tension.
Using ALMA observations of interstellar comet 3I/ATLAS, researchers detected distinct outgassing behaviors between methanol and hydrogen cyanide, revealing a remarkably high CHOH/HCN production rate ratio that ranks among the highest ever measured in comets and is surpassed only by the anomalous C/2016 R2.
This study forecasts that the upcoming Chinese Space Station Survey Telescope (CSST) will significantly constrain the properties of primordial black holes as dark matter candidates, achieving tight limits on the product of their fraction and mass () and precise measurements of key cosmological parameters through a comprehensive $3\times2$pt analysis of galaxy clustering, weak lensing, and galaxy-galaxy lensing.
This paper presents the first release of the Stellar Stream Legacy Survey (SSLS), which visually identifies accretion features around 730 nearby dwarf galaxies to establish a baseline frequency of 5.1% and highlight the observational challenges and theoretical needs in studying low-mass galaxy mergers.