280 papers
This study demonstrates that angular momentum-driven accretion disks in common envelope systems containing a neutron star and a massive companion facilitate the synthesis of significant rp-process products and alpha-rich elements like Ti and Ni, offering a new mechanism for galactic chemical evolution.
This study utilizes the high sensitivity of the MeerKAT radio telescope to search for synchrotron emission from Weakly Interacting Massive Particles (WIMPs) in the Reticulum II dwarf spheroidal galaxy, establishing improved constraints on WIMP properties and demonstrating the potential of radio astronomy for dark matter detection.
This paper demonstrates that machine learning techniques, particularly gradient-boosting algorithms like XGBoost, can effectively classify and disentangle overlapping populations of stellar remnant binaries in simulated LISA data, achieving high recall rates for double white dwarf and high-mass systems while significantly outperforming statistical methods in identifying challenging neutron star-white dwarf binaries.
This paper proposes that quasi-periodic oscillations observed in both radio flux and linear polarization of black hole jets are caused by kink instability, a conclusion supported by simulations that successfully reproduce the observed modulations and the anti-correlation between flux and polarization.
Using high-resolution direct N-body simulations to track neutron stars from both surviving and disrupted globular clusters, this study demonstrates that the resulting population of millisecond pulsars can fully reproduce the observed Galactic Centre gamma-ray excess, thereby favoring an astrophysical origin over dark matter annihilation.
This paper presents hand-curated size measurements and multi-wavelength characterizations of 2,002 multiple-component radio AGNs in the ROGUE I catalog, revealing how morphological classes, jet stability, and local intracluster medium conditions influence source sizes, arm-length asymmetries, and evolutionary tracks across redshifts 0.01 to 0.54.
Using the Fast Folding Algorithm and the PYSOLATOR resampling code on 272.2 hours of FAST telescope data, researchers searched for periodic radio signals from companions in 13 double neutron star systems but found no new companion signals among 197,962 candidates, despite successfully improving the detection of known pulsars.
This paper reports the detection of a likely 2.4-year quasi-periodic oscillation in the 37 GHz radio light curve of the blazar Ton 599, observed between 1990 and 2020 using multiple statistical analysis methods.
Based on 24 years of X-ray monitoring, this study reveals that accretion-driven coupling between the disc and corona governs both the long-term spectral evolution and transient quasi-periodic oscillations in the Seyfert galaxy Mrk 530, with specific accretion rates dictating coronal geometry and thermal balance.
Using high-cadence TESS optical data, this study analyzes the variability of blazar S5 0716+714, finding that its light curves are best described by bending power laws and complex CARMA processes rather than simple damped random walks, while also identifying a potential ~6.5-hour quasi-periodic oscillation with ~95% global significance.
This study analyzes XMM-Newton observations of the blazar OJ 287 from 2005 to 2022, revealing low-amplitude intraday variability, cospatial soft and hard X-ray emissions, and a red noise-dominated power spectrum that indicates significant contributions from both particle acceleration and synchrotron cooling mechanisms.
This paper analyzes radio observations of 53 tidal disruption events to constrain the circumnuclear medium density profiles of 26 quiescent supermassive black holes using closure relations, demonstrating that this method yields results consistent with equipartition estimates and is an efficient tool for studying accretion history.
This paper introduces SwinYNet, a transformer-based multi-task model that achieves highly accurate and efficient Fast Radio Burst detection, segmentation, and parameter estimation directly from time-frequency data without de-dispersion, demonstrating superior performance over existing tools and enabling real-time, large-scale radio surveys on consumer-grade hardware.
This study utilizes CTAO simulations with Gammapy to evaluate the observatory's ability to detect hadronic gamma-ray signatures from four PeVatron candidates, concluding that while 100 hours of observation are needed to distinguish proton cut-off energies up to 600 TeV, CTAO can likely exclude Cassiopeia A, RX J1713.7-3946, and HESS J1731-347 as PeVatron sources, leaving HAWC J2227+610 inconclusive.
This paper analyzes multiwavelength data of the blazar Ton 599 from 1983 to 2025, revealing highly correlated quasi-periodic variability with characteristic periods of 1.4 to 7.5 years that are best explained by a combination of geometric effects from a binary supermassive black hole system and stochastic internal jet shocks.
This paper demonstrates that individual supermassive black hole binaries produce distinct spatial correlation patterns in Pulsar Timing Array data, providing a robust geometric fingerprint that breaks degeneracies with stochastic backgrounds, significantly improves sky localization, and offers a reliable alternative to phase-coherent searches for identifying nanohertz gravitational-wave sources.
The paper introduces SuperSNEC, an accelerated version of the SuperNova Explosion Code that utilizes adaptive gridding and solver optimizations to generate accurate supernova light curves for large model grids in under two seconds per model, achieving high fidelity with low-resolution simulations and successfully reproducing observed events like SN 2020oi without requiring additional power sources.
This paper presents ULTRACAM photometric observations and public survey data to identify optical counterparts for nine quiescent black hole X-ray transients, resulting in the first optical identifications and precise astrometry for four targets, refined coordinates for an active source, and magnitude limits for five others to constrain their companion star properties.
The rapid optical detection of GRB 250702F by the Ondřejov D50 telescope revealed a unique flare morphology that provides compelling evidence for thermal electrons in ultra-relativistic shocks, challenging standard non-thermal afterglow models and aligning with particle-in-cell simulation predictions.
The paper introduces the Long-Integration Magnetar Burst Observatory (LIMBO), a real-time radio transient detection system at Leuschner Radio Observatory, and reports its successful monitoring of the magnetar SGR 1935+2154, which yielded 12 candidate FRB detections and established a cumulative rate-fluence power-law slope of for Galactic magnetar bursts.