967 papers
This study suggests that the observed X-ray weakness in high-redshift Little Red Dots and JWST-selected AGN likely stems from suppressed hot corona emission in highly accreting supermassive black holes, a phenomenon analogous to local super-Eddington systems, while also noting that high-redshift observational limitations may further contribute to the deficit.
This paper reviews recent high-energy neutrino astronomy results from observatories like IceCube and KM3NeT, examining potential cosmic accelerators such as Seyfert galaxies and blazars while emphasizing the critical need for next-generation multi-messenger facilities like IceCube-Gen2 to resolve source associations and probe the ultra-high-energy regime.
By employing a state-of-the-art recoil-kick model (gwModel_flow_prec) instead of traditional analytic approximations, this study demonstrates that the retention probability of hierarchical black-hole merger remnants in globular clusters is significantly higher, thereby altering the resulting mass and spin distributions and offering new insights into the formation of massive binaries like GW231123.
This study demonstrates that radio selection effectively identifies a previously missed population of heavily obscured, Compton-thick AGNs at high redshifts () in the J1030 field, revealing a number density significantly higher than X-ray-based predictions and highlighting the need for synergistic radio and X-ray observations to fully census these objects.
This paper introduces a computationally efficient and physically interpretable halo streaming model for redshift-space distortions that combines a halo-model decomposition with -body trained emulators to accurately reproduce nonlinear galaxy clustering on small scales, thereby enabling precision cosmological analyses for upcoming surveys like DESI and Euclid.
This paper presents a project establishing thirty-two faint, all-sky DA white dwarfs as spectrophotometric standard stars with sub-percent uncertainties by validating fully radiative pure hydrogen models against observations, thereby providing an unprecedented ensemble of standards for large telescopes and surveys that complements the existing CALSPEC scale.
Using a high-resolution cosmological MHD simulation with improved Lagrangian tracer methods, the authors demonstrate that cosmic ray reacceleration by turbulence induced during the early stages of a galaxy cluster merger can successfully generate a Mpc-sized radio synchrotron bridge that matches the observed properties of the structure between Abell 399 and Abell 401.
This paper proposes a hybrid Roche-lobe overflow model for Cygnus X-3, where a focused wind-driven accretion stream creates a shock-heated turbulent wall that occults the central funnel to explain the system's deep orbital modulation, phase lag, and spectral features, while simultaneously accounting for its observed secular orbital expansion through non-conservative mass transfer.
This paper presents a unified theory demonstrating that a single dimensionless parameter governs the linear mode conversion between Alfvén, ordinary, and extraordinary plasma waves in ultramagnetized neutron star magnetospheres, where magnetic field-line curvature drives efficient, angle-dependent transitions that explain complex polarization features in pulsars and fast radio bursts.
This paper presents a systematic transit survey of 121 newly accessible mid-to-late M-dwarfs using TESS Cycle 6+ data, which identified 20 transit-like signals across 16 systems and established a robust reliability framework to prioritize two high-confidence candidates for radial velocity follow-up while flagging others for further observation.
Using high-resolution Solar Orbiter observations, this study details the fine dynamics of over 22 recurrent coronal jets driven by persistent interactions between rising loops/mini-filaments and a fan-spine-like structure, revealing specific mechanisms such as partial eruptions, current sheet formation, and blob propagation.
The paper proposes a variable ADAF disk model for X-ray binary systems, where the cyclic contraction and expansion of an inner optically thick ADAF torus unifies the explanation of X-ray outburst phases, spectral state transitions, specific emission line features, and the 35-day period in Her X-1, with potential applications to active galactic nuclei.
This paper introduces an enhanced, observation-applicable Bayesian classifier using Gaussian mixture models to reliably categorize galaxy cluster dynamical states into multiple merger stages, demonstrating that utilizing a larger set of indicators and projecting high-dimensional simulation data onto lower-dimensional spaces yields superior classification performance compared to previous methods.
This paper proposes a unified two-channel framework for atmospheric escape that replaces the traditional binary distinction between hydrodynamic and Jeans escape with a smooth transition where collisional and collisionless particle behaviors coexist and interact, fundamentally altering how mass and momentum are lost from hydrogen-rich atmospheres.
This paper reports the detection of a narrow X-ray absorption feature at 3.29 keV and candidate pulsations in the ultraluminous X-ray source NGC 4656 ULX-1, which are interpreted as evidence for a proton cyclotron resonant scattering feature indicating a local magnetic field of approximately G near the surface of a highly magnetized neutron star.
This paper introduces a new 3D dynamical model, SOCOL:14C-Ex, to analyze the atmospheric production and transport of radiocarbon during extreme solar particle events, enabling the precise characterization and strength assessment of seven major Miyake events over the past 14,000 years, with the 12351 BC event identified as the strongest overall and the AD 774 event as the strongest of the Holocene.
This paper introduces a candidate cross-matching algorithm based on spin period and dispersion measure consistency to identify recurring pulsar signals, which was successfully applied to FAST data to discover the binary millisecond pulsar PSR J1647-0156B (M12B) in the globular cluster M12.
China's Tianwen-1 spacecraft made history by capturing the first deep-space images of the interstellar object 3I/ATLAS from Mars, revealing a coma dominated by large dust grains and providing unique constraints on its dust dynamics and potential origin in the outer regions of a parent planetary disk.
This paper proposes and validates a computational method that directly infers intra-pixel sensitivity variations (IPSVs) from stellar images to reconstruct the instrumental point spread function, thereby reducing astrometric centroiding errors by nearly 30 times and enabling continuous detector calibration for future space-based surveys.
This multi-wavelength study of PKS 1222+216 reveals that its 2014 -ray flare resulted from the interaction between a moving jet component and a stationary feature located approximately 9.2 pc from the central engine, allowing for the estimation of magnetic field strengths (77–134 mG) that decline with distance as under non-equipartition conditions.