1088 papers
By analyzing 18 years of Fermi-LAT data, this study links a 1.7-year gamma-ray quasi-periodic oscillation in PKS 2155-304 to a spectral hardening event occurring at flux minima, proposing a geometric masking scenario where jet structure regulates the visibility of acceleration processes otherwise obscured by relativistic boosting.
This paper proposes that geometric masking, where Doppler boosting preferentially amplifies a soft jet component in aligned AGN, explains extreme spectral hardening events and TeV detections in low-flux states, thereby refining the AGN unification scheme and suggesting that high-energy particle acceleration occurs more frequently than flux-selected observations imply.
This paper introduces a fast deep generative framework that significantly accelerates high-dimensional Bayesian posterior sampling compared to diffusion-based methods, successfully demonstrating its robustness and effectiveness in recovering unlensed CMB power spectra for cosmological delensing applications.
This paper reviews the current understanding of interstellar polycyclic aromatic hydrocarbons (PAHs)—including their formation, chemical evolution, and critical roles in the interstellar medium—by synthesizing new insights from James Webb Space Telescope observations with supporting laboratory and quantum chemistry studies to chart the field's future progress.
This study analyzes 68 unequal-mass eclipsing binaries from the EBLM survey to demonstrate that tidal synchronization and circularization are highly efficient for orbital periods under 3 days, while the persistence of asynchronous systems in longer-period binaries suggests limitations in current tidal theories.
This study demonstrates that initializing MHD flare simulations with non-force-free extrapolations, which account for plasma pressure and gravity, yields significantly higher magnetic energy release and more realistic synthetic emissions compared to traditional non-linear force-free field models, thereby highlighting the critical impact of initial magnetic assumptions on flare dynamics and observables.
This study presents the first systematic comparison of seven hydrodynamic codes simulating the unstratified streaming instability, revealing broad qualitative agreement across methods while identifying dust modeling choices and resolution as key factors influencing quantitative density statistics and highlighting the superior energy efficiency and scalability of GPU-based implementations.
This paper utilizes hydrodynamical simulations and analytical models to demonstrate that high-mass, centrally concentrated stars can survive numerous partial tidal disruption events by supermassive black holes, thereby explaining the repeating nuclear transients observed in sources like ASASSN-14ko and AT2020vdq, while low-mass stars are predicted to be destroyed after only a few encounters.
Using Strömgren photometry and stellar age-dating algorithms, this study reveals that the R127 and R128 clusters in the Large Magellanic Cloud exhibit an anomalous scarcity of bright blue stars compared to single-star evolutionary models, suggesting that the peculiar nature of the luminous blue variable R127 may stem from binary evolution, rapid rotation, or observational incompleteness rather than standard single-star evolution.
This study reports the first detection of double-peaked forbidden emission lines in the LINER galaxy IC 1459, successfully modeling them with a disk-like broad-line region to demonstrate that such lines originate in lower-density outskirts of the BLR.
This paper introduces NEXUS, a JWST Multi-Cycle Treasury survey around the North Ecliptic Pole comprising Wide and Deep tiers for multi-epoch imaging and spectroscopy, and details the status, targeting information, and initial data releases for its Deep tier's 18-epoch observing campaign.
The paper introduces PulSKASim, a novel pulsar simulator designed to generate realistic SKA-scale interferometric observations by accurately modeling flux variability, integration-time effects, and noise to enable comprehensive end-to-end testing of calibration, imaging, and detection pipelines.
Using XRISM observations of 4U 1822-371, this study presents the first X-ray Doppler tomography of the Fe K line, revealing a compact reflector at the accretion stream-disk overflow that aligns with optical O VI emission and establishes a new method for mapping accreting systems.
By combining Gaia astrometry and Gaia-ESO Survey radial velocities for 430 members, this study determines the 3D rotation of the open cluster NGC 2516, revealing a median rotational velocity of 0.12 km/s at a 74-degree angle to the galactic plane that contradicts expected dependencies on cluster age and mass.
The paper introduces AstroInspect, a web-based system designed to streamline the organization, assessment, and visual inspection of astronomical objects by integrating real-time data from multiple surveys into a single intuitive interface, as demonstrated by its successful application in identifying H emission-line galaxies in the Hydra I cluster.
Through numerical simulations and radiative transfer modeling, this study suggests that the asymmetric shoulder features observed in the dust-continuum emission of the Class 0 protostar IRAS 16544-1604 in CB 68 are likely caused by gravitational instability in a massive disk, even though the resulting spiral structures are too small to be directly resolved by current eDisk observations.
This paper investigates the interaction between relativistic jets and supernova ejecta as the origin of X-ray knots in radio galaxies, using M 87's knot A to demonstrate that while the ejecta shock fails to match observed spatial scales, the jet shock successfully reproduces the morphology and spectral energy distribution, suggesting a mechanism for accelerating particles to ultra-high energies.
This paper proposes that if massive primordial black holes constitute a fraction of dark matter, they can act as high-density seeds to dramatically accelerate galaxy formation within 100 Myr and potentially explain the existence of low surface brightness galaxies as residues of failed accretion.
This paper reports the results of a directed search for continuous gravitational waves from unknown neutron stars in five Milky Way globular clusters using LIGO-Virgo-KAGRA data from the first eight months of the fourth observing run, finding no detections but setting the most sensitive upper limits to date across most of the explored parameter space.
This study demonstrates that future -ray observations from LHAASO-KM2A and the Cherenkov Telescope Array will significantly enhance the ability to identify distant pulsar halos by distinguishing their diffusion-based morphologies from alternative models through improved photon statistics and angular resolution.