1092 papers
Using IXPE observations of the 2025-2026 outburst, this study reports the discovery of significant, strong energy-dependent X-ray polarization in the black hole binary GS 1354-64 during an intermediate state, revealing a ~4% polarization degree that increases to ~11% at higher energies and providing new insights into the accretion geometry and coronal structure of black hole X-ray binaries.
This study utilizes the latest DESI DR2 BAO and cosmic chronometer data to constrain time-varying vacuum CDM models, finding that observations strongly favor the standard CDM limit while significantly reducing parameter degeneracies and alleviating the Hubble tension.
This paper presents a multidisciplinary design optimization framework using OpenMDAO and Dymos that simultaneously optimizes low-thrust trajectories and spacecraft power systems for asteroid orbit insertion, explicitly coupling variable-specific impulse Hall thruster performance with time-varying solar power availability to overcome the limitations of traditional simplifying assumptions.
This study analyzes ACS/WFC bias frames to determine that read noise exhibits no column dependence but is influenced by row number due to accumulated dark current, while also finding that physical pre-scans have lower noise than science arrays, amplifiers A and C show an initial linear noise decrease, and masking hot pixels reduces column noise.
This study demonstrates that approximately 90% of Milky Way open clusters, particularly those with fewer than 250 stars, align with the radial acceleration relation and baryonic Tully-Fisher relation with an acceleration scale consistent with MOND predictions, suggesting that low-acceleration gravitational dynamics operate on parsec scales within the Galaxy.
This paper presents the Cataclysmic Variable Confident Catalogue (CCC), a comprehensive dataset of orbital periods for 910 cataclysmic variables and candidates derived from TESS observations, which validates existing measurements, corrects discrepancies, and provides new period determinations for the broader population.
This study utilizes multi-wavelength thermal imaging to reveal that the archetypal Pictoris debris disk exhibits a vertically thicker mid-infrared structure compared to its millimeter counterpart, a finding that challenges collisional damping models and supports a scenario driven by radiation pressure, random collisions, and secular perturbations from inner giant planets.
This study reports the discovery of a protocluster at z ≈ 4.9 and reveals that its member galaxies are significantly larger in rest-frame optical light compared to field galaxies, suggesting that dense protocluster environments at this epoch preferentially influence the structure of extended stellar populations through mechanisms like tidal interactions or accelerated star formation.
Using JWST NIRSpec and MIRI observations, this study analyzes atomic hydrogen emission in scattered light from the Class 0 protostar L1527 IRS to characterize its magnetospheric accretion, estimating an accretion rate of approximately $1\times10^{-7}~ \text{M}_\odot \text{yr}^{-1}$ and discussing implications for non-steady, asymmetric accretion processes.
This paper demonstrates that the marked power spectrum is a practical and efficient alternative to the bispectrum for extracting non-Gaussian information from galaxy redshift surveys, as it effectively breaks parameter degeneracies, accommodates standard survey geometry treatments, and allows for cosmological inference through smooth interpolation rather than complex analytical modeling.
This paper proposes that the Weibel instability, driven by photoionization-induced anisotropic electron velocity distributions during cosmological reionization, can rapidly generate seed magnetic fields in the intergalactic medium.
Using 13 years of high-resolution SOPHIE spectroscopic data, this study identifies and characterizes distinct long-term magnetic activity cycles of approximately 4.8 and 4.9 years in the exoplanet-hosting M dwarfs GJ 617A and GJ 411, respectively, confirming their magnetic origin and distinguishing them from planetary signals to improve future exoplanet detection efforts.
This paper reports the detection of a high-energy neutrino flare from the Type IIn supernova SN~2017hcd with an isotropic energy far exceeding that of its ejecta, suggesting the emission likely originated from a choked jet rather than the standard ejecta–circumstellar medium interaction.
This study utilizes LAMOST spectroscopic data to calibrate chromospheric activity indices for over 11,000 solar-like stars, revealing that activity levels increase with rotation rate until reaching a saturation threshold that varies systematically with effective temperature and convective zone depth.
This paper investigates the quasinormal modes of a scalar field on a parity-violating rotating black hole background, deriving perturbative frequency corrections for low spins and revealing significant deviations from Kerr predictions in the near-extremal regime, thereby offering a new method to probe parity-violating gravity in strong gravitational fields.
This paper presents a transformer-based foundation model that leverages Gaia XP spectra and APOGEE data to simultaneously predict atmospheric parameters, mass, and age for evolved stars with high accuracy, demonstrating that data-driven approaches can effectively internalize stellar physics to overcome spectral degeneracies in Galactic archaeology.
This paper presents an autoencoder-based machine learning framework that effectively identifies anomalous stellar spectra, such as instrumental errors and rare carbon or oxygen-rich stars, within the MaNGA Stellar Library by leveraging reconstruction errors as anomaly scores.
This paper analyzes the evolution of time-lags and type-C QPOs in the black hole X-ray binary Swift J1727.8-1613 during its 2023 rising outburst, revealing a transition from hard to soft lags and strong correlations with QPO frequency and shock location that support the propagating oscillatory shock model of accretion dynamics.
This study integrates the size-resolved CARMA bin microphysics scheme into the CAM6 global climate model to simulate exoplanets across various rotation rates, revealing that while the native Morrison-Gettelman parameterization yields reasonable habitability assessments, the resolved microphysics significantly alters cloud properties and ice size distributions, which has critical implications for interpreting exoplanet transmission spectra.
This study utilizes complete spectroscopic samples from nine massive local galaxy clusters to characterize their stellar mass functions, revealing distinct shapes for quiescent and star-forming populations and identifying a significant excess of intermediate-mass galaxies compared to IllustrisTNG-300 simulations, thereby providing critical constraints for galaxy formation models in dense environments.