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Preprint Teks lengkap
The role of detailed gas and dust opacities in shaping the evolution of the inner disc edge subject to episodic accretion
We investigate the effects of different dust and gas opacity descriptions on the structure and evolution of the inner regions of protoplanetary discs. The influence on the episodic instability of the inner rim is hereby of central interest. 2D axisymmetric radiation hydrodynamic models are employed…
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Preprint Teks lengkap
Ubiquitous yet forgotten: broad absorptions in the optical spectra of low-mass X-ray binaries
Optical outburst spectra of low-mass X-ray binaries enable studies of extreme accretion and ejection phenomena. While some of their spectroscopic features have been analysed in detail, the appearance of broad absorptions in the optical regime has been traditionally neglected. In this work, we…
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Preprint Teks lengkap
Precursors in tidal disruption events: repeating, fast, and AGN-hosted TDEs
Context. Tidal disruption events (TDEs) are rare transients that provide important insights into the physics of galactic nuclei. A recently identified feature in their optical light curves is the presence of early bump-like structures (precursors) that appear before the onset of the main flare or…
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Preprint Teks lengkap
Investigating Disordered Granular Matter via Ordered Geometric Fragmentation
The evolution of occupied volume under progressive fragmentation of granular matter is studied using a purely geometric model. Rather than modelling disorder directly, properties are investigated by analysing highly ordered reference configurations that provide sharp upper bounds on accessible…
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Preprint Teks lengkap
A model of thermophoresis of colloidal proteins in water using non-Fickian diffusion currents
In 1928, Chapman generalised Einstein's theory of diffusion for non-uniform fluids to show the presence of a non-Fickian diffusion current, which he considered important in thermodiffusion (Ludwig-Soret effect). In 1941, Kiyosi Itô proposed the formal methods of stochastic calculus in the presence…
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Preprint Teks lengkap
Ice-free geomorphometry of Queen Maud Land, East Antarctica: 3. Belgica and Yamato (Queen Fabiola) Mountains
Geomorphometric modeling and mapping of ice-free Antarctic areas can be applied for obtaining new quantitative knowledge about the topography of these unique landscapes and for the further use of morphometric information in Antarctic research. Within the framework of a project of creating a…
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Preprint Teks lengkap
Seismic detection of core magnetic fields in red giants using the gravity offset
Magnetic fields are known to efficiently redistribute angular momentum in stars. They have been recently measured in the cores of red giant stars using asteroseismology. It was shown that core magnetic fields, if unaccounted for, can bias the measurements of the gravity offset $ε_g$, which is…
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Preprint Teks lengkap
Modeling isolated magnetar spin-down evolution and implications for long-period radio transients
Long-period radio transients (LPTs) are a new class of radio sources characterized by long spin periods ($P_{\text{spin}}>10^3$ s) and highly variable radio emission. While known magnetars are relatively young ($τ\sim10^{15}$ G) and larger ambient densities ($n_0>\sim10^2$ cm$^{-3}$), magnetars…
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Preprint Teks lengkap
On the dynamics, thermodynamics and fine structure of virtual erupting filaments
It is not fully understood why some solar filaments erupt while others do not. Those that do typically undergo a slow rise followed by an acceleration phase, though this transition requires further investigation. Erupting prominences have been observed to heat up during the acceleration phase, but…
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Preprint Teks lengkap
Einstein connection of nonsymmetric pseudo-Riemannian manifold
A.Einstein considered a linear connection $\nabla$ with torsion $T$ on a smooth manifold equipped with a nonsymmetric (0,2)-tensor $G=g+F$, where $g$ is a pseudo-Riemannian metric associated with gravity, and $F\ne0$ is a skew-symmetric tensor associated with electromagnetism, such that…
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Preprint Teks lengkap
Deepest ever photographed Geminid with small but not negligible terminal mass
We report an instrumental observation of the very exceptional Geminid fireball which was observed in scope of the Czech part of the European Fireball Network (EN) on 13 December 2012 at 4h12m59.4s UT. The uniqueness of this Geminid fireball consists of the record depth of its penetration in the…
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Preprint Teks lengkap
Self-referenced, drift-tolerant dipole-resolved population inversion using degeneracy-lifted dual quasinormal modes
Photoluminescence intensity is widely used to infer exciton populations, yet the detected signal inherently convolves occupancy with radiative-rate modification and collection efficiency, making quantitative inversion vulnerable to pump and system drifts. Here we realize a dual-channel…
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Preprint Teks lengkap
Geometric and topological rigidity of pinched submanifolds in Riemannian manifolds
We study the rigidity of compact submanifolds of Riemannian manifolds of arbitrary codimension that satisfy a sharp pinching condition involving the norm of the second fundamental form and the mean curvature. Without assuming that the ambient manifold is a space form, we show that this condition…
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Preprint Teks lengkap
Dissipative charging of tight-binding quantum batteries
We investigate autonomous dissipative charging mechanisms for lattice quantum batteries within the framework of open quantum systems. Focusing on engineered Markovian dissipation, we show that appropriately designed Lindblad jump operators can drive tight-binding systems into highly excited…
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Preprint Teks lengkap
Analytical modeling of helium absorption signals of isothermal atmospheric escape
Atmospheric escape driven by extreme ultraviolet (EUV) radiation is a critical process shaping the evolution of close-in exoplanets. Recent observations have detected helium triplet absorption in numerous (>20) close-in exoplanets, highlighting the importance of understanding upper atmospheric…
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Preprint Teks lengkap
An extension to reversible jump Markov chain Monte Carlo for change point problems with heterogeneous temporal dynamics
Detecting brief changes in time-series data remains a major challenge in fields where short-lived states carry meaning. In single-molecule localisation microscopy, this problem is particularly acute as fluorescent molecules used to tag protein oligomers display heterogenous photophysical behaviour…
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Preprint Teks lengkap
Emergence of generic first-passage time distributions for large Markovian networks
First-passage times are often the most relevant aspect of a complex Markovian network, because they signify when information processing has resulted in a definite decision. Previous studies have shown that for kinetic proofreading networks in the limit of large network size the first-passage time…
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Preprint Teks lengkap
Detection prospects of solar $g$-modes with LISA
The possibility of detecting solar oscillation modes using space-based gravitational-wave detectors has been investigated in the context of gravitational-wave interferometry, with Polnarev \cite{Polnarev:2009xf} demonstrating that low-frequency solar modes could, in principle, produce detectable…
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Preprint Teks lengkap
Weak approximation of kinetic SDEs: closing the criticality gap
We study the weak convergence of a generic tamed Euler-Maruyama scheme for kinetic stochastic differential equations (SDEs) with integrable drifts. We show that the marginal density of the considered scheme converges at rate 1/2 to the corresponding marginal density of the SDE. The convergence rate…
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Preprint Teks lengkap
Weak S-type asteroids compared to C-type explain the observed size distribution of the main belt
The main belt, the region between the orbits of Mars and Jupiter, is home to more than 1 million asteroids. These asteroids form orbital groups, (i.e., asteroid families formed by collisions) and also spectral groups (taxonomies) with different chemical compositions, in particular carbonaceous…
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