287 papers
This paper develops new analytic fitting formulae for photodisintegration cross sections to demonstrate that the survival of ultraheavy nuclei in protomagnetar outflows is highly sensitive to the outflow geometry and engine properties, with spherical winds allowing survival only in the early phase and jetted outflows permitting survival primarily in low-spin-down energy scenarios before jet breakout.
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 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.
Using the Green Bank and Parkes radio telescopes, researchers discovered and characterized the first millisecond pulsar, PSR J17162808A, in the globular cluster NGC 6316, confirming its cluster membership through timing analysis despite a lower-than-expected dispersion measure and suggesting that deeper searches could reveal many more pulsars consistent with the cluster's gamma-ray emission.
This paper introduces the first application of the Uniform Manifold Approximation and Projection (UMAP) algorithm to the GWTC-3 binary black hole catalog, demonstrating that this model-independent, non-parametric technique effectively identifies distinct astrophysical subpopulations and formation pathways based on mass and spin characteristics.
This paper utilizes a semi-analytical model of galaxy and supermassive black hole evolution within the CDM paradigm to demonstrate that the observed stellar mass–black hole mass relation at high redshifts disfavours fuzzy dark matter fields with masses below $2.0\times 10^{-20}$ eV and warm dark matter particles with masses below 7.2 keV at the 95% confidence level.
This paper demonstrates that standard strong-field QED models fail to accurately predict angle-, spin-, and polarization-resolved distributions because they incorrectly treat photon emission as an instantaneous local event, and it proposes a new physically consistent model that integrates over the finite formation region to reveal significant deviations in polarization and helicity patterns with major implications for both laboratory experiments and astrophysical observations.
This paper proposes that an evolving intrinsic scatter and normalization in the supermassive black hole-bulge mass relation at high redshifts can reconcile the observed excess amplitude of the gravitational wave background with theoretical models while simultaneously explaining the existence of overmassive black holes in the early universe.
This paper presents a comprehensive analysis of GRB 250916A, revealing that its precursor emission originates from a thermal cocoon shock breakout and its main afterglow is best explained by a highly energetic, narrowly collimated powerlaw jet viewed moderately off-axis, with a long quiescent interval suggesting a temporary central engine shutdown.
This paper proposes a framework explaining why certain Galactic non-thermal X-ray and TeV-PeV -ray sources appear spatially offset from their cosmic ray acceleration sites, demonstrating that such displacement arises from anisotropic electron propagation before pitch-angle scattering and offers a direct method to infer the cosmic ray scattering rate.
This paper employs a semi-analytic two-component model to analyze the thermal evolution of the central star in the Pa 30 nebula, concluding that its observed properties are best explained by a core mass of 1.15–1.4 solar masses and a small hot envelope, supporting a scenario where SN 1181 resulted from the merger of O/Ne and C/O white dwarfs.
By analyzing archival VLTI interferometric data combined with radial velocities, this study reveals that Alpha Crucis is a seven-star system with newly discovered companions Bb and a close binary in component A, providing dynamical mass measurements and evidence of significant orbital misalignment that suggests a complex dynamical formation history.
This study presents a systematic 3D analysis of neutrino spectral pinching across 25 core-collapse supernova simulations, revealing a distinct late-time pinching floor lower than 1D predictions, suppressed viewing-angle dispersion in black-hole-forming models, and the potential for 8–12% neutrino mass ordering discrimination via next-generation detectors.
The PACHA project utilizes quasi-simultaneous NuSTAR and XMM-Newton observations of high-redshift AGN to reveal significantly lower coronal temperatures and higher optical depths compared to local AGN, suggesting efficient Compton cooling and consistency with purely thermal radiation MHD simulations.
This study investigates how dark matter and non-magnetized plasma influence the shadow and photon orbits of a Kerr-like black hole, revealing that while dark matter has negligible effects, plasma density significantly alters shadow size and deformation depending on its distribution profile, with these findings being constrained by Event Horizon Telescope observations of M87* and Sgr A*.
This paper demonstrates that in neutron stars, collisional decoherence causes neutron-to-mirror-neutron transitions to undergo rapid exponential relaxation rather than oscillations, thereby keeping the admixture of mirror neutrons negligible compared to ordinary neutrons.
This paper presents a forecast study demonstrating that a stacking analysis of very-high-energy gamma-ray observations from Active Galactic Nuclei located behind galaxy clusters can probe Axion-Like Particle dark matter in the $10^{-8}10^{-7}6\times10^{-13}^{-1}$.
This paper proposes that targeted searches for supermassive black hole binaries using Pulsar Timing Arrays can overcome large sky localization uncertainties, enabling the Chinese Pulsar Timing Array to measure the Hubble constant with a precision of 2 km/s/Mpc and potentially resolve the Hubble tension.
This paper introduces a computationally efficient "shifted-geodesic" framework that approximates gravitational-wave fluxes from spinning bodies orbiting Kerr black holes by incorporating leading spin effects into orbital frequencies while retaining the global structure of geodesic motion, offering a pragmatic tool for rapid EMRI/IMRI flux calculations and LISA parameter-space studies with minimal dephasing error.
This paper proposes a quantum mechanical model of black hole decay via fuzzy sphere tunneling mediated by monopole zero modes, demonstrating that this unitary process reproduces the semi-classical Hawking radiation rate and Boltzmann distribution while offering a framework to determine the full wave function of the emitted quanta.