173 papers
This paper utilizes 2D3V PIC simulations to demonstrate that in freely decaying sub-ion turbulence, intermittent regions with non-zero drive helicity reduction, motivating a new history-dependent helicity density that reveals time-invariant intermediate-scale plateaus consistent with kinetic decay constraints.
This paper presents multiband observations and hybrid modeling of SN 2024abvb, identifying it as a luminous Type Icn supernova with a low ejecta mass resulting from significant progenitor mass stripping, as evidenced by its early C II emission lines and lack of hydrogen or helium features.
This paper presents the description and characterization of the FoReRo2 instrument's polarimetric and spectropolarimetric capabilities at the Rozhen Observatory, including a statistical analysis of Serkowski's law parameters, an evaluation of standard star stability, and demonstration of its performance through observations of RS Oph, comet C/2019 Y4, and the symbiotic star Z And.
By analyzing Gaia astrometry in 98 transition disks, this study finds that while companions are detected in 32% of the sample, most are stellar-mass objects that cannot explain the inner dust cavities, suggesting that if companions are responsible for cavity formation, they are likely planetary-mass bodies residing at wider separations.
This study models dust formation in Type Iax supernovae ejecta and concludes that, unlike typical Type Ia supernovae, this low-luminosity subclass is a significant producer of iron-rich silicate dust, potentially locking up a large fraction of iron in grains with a dust-to-ejecta mass ratio orders of magnitude higher.
This paper establishes updated nominal RUWE thresholds for upcoming Gaia data releases (DR4 and DR5) based on a full 10-year mission simulation, demonstrating that these stricter limits will significantly increase the detectability of both short-period binaries (down to days) and long-period systems (up to 100 years) by better distinguishing them from well-behaved single stars.
This study demonstrates a high correlation (92%) and strong linear agreement (slope of 0.96) between line-of-sight velocity measurements from the SO/PHI-HRT instrument on Solar Orbiter and the SDO/HMI instrument, confirming their consistency for future multi-vantage point solar observations.
This paper introduces an analytical impulse map to model the gravitational dynamics of quasi-hierarchical triple systems with highly eccentric outer orbits, revealing that their inner eccentricity undergoes a random-walk evolution distinct from standard secular mechanisms and significantly altering their gravitational wave coalescence times.
This paper presents a comprehensive catalog of over 1.1 million massive star candidates across 26 nearby galaxies, generated using a machine-learning classifier on Spitzer and Pan-STARRS1 photometry, which identifies nearly 120,500 red supergiants and other evolved massive stars to facilitate studies on mass loss, metallicity effects, and luminosity limits.
This paper demonstrates that the linear relationship between sunspot and white-light facular areas at the onset of solar cycles serves as a highly accurate, physically based predictor of cycle amplitude up to four years in advance, successfully confirming historical data and correctly forecasting a larger-than-expected Cycle 25.
Using multi-spacecraft observations from Earth's magnetosheath, this study provides the first quantitative evidence that compressible MHD turbulence exhibits a weak-to-strong transition specifically in slow modes, while fast modes remain weakly turbulent, thereby offering a comprehensive characterization of spatiotemporal properties across different turbulence regimes.
This paper presents the first complete evolutionary calculation of a 1.313 solar mass ultramassive white dwarf descended from a 9 solar mass progenitor, detailing its thermal pulse history, post-AGB transition, and resulting ONeMg composition with a minor carbon layer and helium envelope.
This study uses thermochemical modeling to demonstrate that dust-depleted inner regions of protoplanetary disks around Herbig stars are molecular-rich environments where dust sublimation significantly enhances SiO abundance, making CO and SiO overtone lines key tracers for understanding terrestrial planet formation.
This paper investigates the nonlinear evolution of the Sun's most prominent high-latitude inertial mode () on a differentially rotating sphere, demonstrating through direct numerical simulations that it undergoes a supercritical Hopf bifurcation where Reynolds stresses smooth the differential rotation to saturate the instability at amplitudes comparable to solar observations.
This paper analyzes the eclipsing double low-mass white dwarf system J2102–4145 to demonstrate that its components formed via distinct evolutionary pathways—stable Roche-lobe overflow for the primary and extreme common-envelope mass loss for the secondary—thereby providing a stringent observational constraint on hydrogen-envelope retention and challenging current theoretical models of envelope ejection.
This study utilizes 3D magnetohydrodynamic simulations to demonstrate that the structure and mechanical feedback of massive star cluster winds are determined by the surrounding cavity's density and pressure, enabling a novel, computationally efficient method to model wind termination shocks across different cluster ages and validate them with a semi-analytical approach.
This paper proposes that long-period transients like GLEAM-X J1627-5235 are isolated, massive, highly magnetized white dwarf pulsars formed via double white dwarf mergers, a model that successfully explains their observed rotational periods and lack of optical counterparts.
This study utilizes the BEST database to independently validate and re-calibrate the Stetson standard star photometry, correcting significant spatially dependent systematic errors to achieve field-to-field zero-point precisions of 2–4 mmag and sub-10 mmag agreement for individual stars in the BVRI bands.
This paper proposes that a reaction-diffusion model featuring a moving reaction front driven by protostellar outflows explains the observed evolutionary transition of young stellar disks from structureless Class 0 systems to ring-gap structured Class II systems.
This paper reports the discovery of ASASSN-25dc, a candidate period bouncer dwarf nova exhibiting unusual outburst characteristics and a low mass ratio that challenge existing superoutburst models by suggesting an inside-out outburst mechanism in a massive disc lacking the expected 2:1 tidal resonance.