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Canalized hyperbolic magnetoexciton polaritons by Shubnikov-de Haas effect in van der Waals semiconductors
Guangyi Jia, Qizhe Cai, Chunqi Zheng, Xiaoying Zhou, Cheng-Wei Qiu
https://arxiv.org/abs/2510.11163

Canalized hyperbolic magnetoexciton polaritons by Shubnikov-de Haas effect in van der Waals semiconductors
Polariton canalization exhibits highly collimated and diffraction-free propagation characteristics in natural hyperbolic materials, holding great promise for molding the energy flow at nanoscale. Previously, the majority of canalizations are realized in phonon polaritons. Herein, we theoretically explore hyperbolic magnetoexciton polaritons (HMEPs) in van der Waals crystals of WTe2, MoS2, and phosphorene. Based on the Shubnikov-de Haas effect, canalized HMEPs with ultralow group velocity (~10-5…

Non-Gravitational Acceleration in 3I ATLAS: Constraints on Exotic Volatile Outgassing in Interstellar Comets
Florian Neukart
https://arxiv.org/abs/2511.07450 https://arxiv.org/pdf/2511.07450 https://arxiv.org/html/2511.07450
arXiv:2511.07450v1 Announce Type: new
Abstract: The interstellar comet 3I/ATLAS exhibited a measurable nongravitational acceleration similar in form to that of 1I/'Oumuamua but of smaller magnitude. Using thermophysical and Monte Carlo models, we show that this acceleration can be fully explained by anisotropic outgassing of conventional volatiles, primarily CO and CO2, under realistic surface and rotational conditions. The model includes diurnal and obliquity-averaged energy balance, empirical vapor-pressure relations, and collimated jet emission from localized active regions. Mixed CO-CO2 compositions reproduce both the magnitude and direction of the observed acceleration with physically plausible active fractions below one percent for nucleus radii between 0.5 and 3 km. Less volatile species such as NH3 and CH4 underproduce thrust at equilibrium temperatures near 1 AU. These results eliminate the need for nonphysical or exotic explanations and define thermophysical limits for natural acceleration mechanisms in interstellar comets.
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Jet MHD analytical model - framework for radiative transfer
E. E. Nokhrina, I. N. Pashchenko, V. A. Frolova, R. V. Todorov
https://arxiv.org/abs/2510.04949 https://

Jet MHD analytical model - framework for radiative transfer
We developed the full magnetohydrodynamical analytical jet model that allows accurate reproducing of a transversal and longitudinal structure for a highly collimated relativistic jets. This model can be used as a setup for convenient solution of radiative transfer equations and modelling the total intensity and polarization maps. We show that the analytical fits are in excellent agreement with the numerical solutions of full magnetohydrodynamical equations. Our approach allows setting easily di…

Radiation magnetohydrodynamics modeling of an impulsively driven chromospheric jet in the solar atmosphere
J. J. Gonz\'alez-Avil\'es
https://arxiv.org/abs/2510.06482 htt…

Radiation magnetohydrodynamics modeling of an impulsively driven chromospheric jet in the solar atmosphere
In this paper, we present a numerical simulation of an impulsively driven chromospheric jet in the solar atmosphere using the non-ideal magnetohydrodynamic (MHD) equations coupled with frequency- and angle-averaged radiation transport equations. These include the dynamics of the radiation energy density and radiation flux. The jet is initiated by a localized Gaussian pulse applied to the vertical velocity component in the upper chromosphere (y = 1.75 Mm), producing a collimated plasma structure…

Late-afterglow Emission from a Quasi-spherical Outflow in a stratified environment
Nissim Fraija, Boris Betancourt-Kamenetskaia, Antonio Galv\'an, Alvaro Montalvo, A. C. Caligula Do E. S. Pedreira, Peter Veres, Rosa Leticia Becerra, Maria G. Dainotti, Simone Dichiara, Hermes Le\'on Vargas
https://arxiv.org/abs/2510.00248

Late-afterglow Emission from a Quasi-spherical Outflow in a stratified environment
Gamma-ray bursts (GRBs) are cosmic events occurring at large distances beyond our galaxy. They provide a unique opportunity to study electromagnetic patterns not seen elsewhere. When the collimated GRB outflow interacts with the outer layers of a star or the wind generated by a binary neutron star merger, it releases energy, forming a quasi-spherical outflow around it. This broad outflow begins to radiate once it has transferred enough energy to the surrounding medium. We have developed a new a…

LST-1 observations of GRB 221009A: Insights into its late-time VHE afterglow
Arnau Aguasca-Cabot (for the CTAO-LST Project), Susumu Inoue (for the CTAO-LST Project), Monica Seglar-Arroyo (for the CTAO-LST Project), Kenta Terauchi (for the CTAO-LST Project), Pol Bordas (for the CTAO-LST Project), Marc Rib\'o (for the CTAO-LST Project)
https://

LST-1 observations of GRB 221009A: Insights into its late-time VHE afterglow
Gamma-ray bursts (GRBs) originate from explosions at cosmological distances, generating collimated jets. GRB 221009A, exploded on 9 October 2022, has been established as the brightest GRB to date. Its bright and long emission was extensively followed up from radio to gamma rays. LHAASO firmly detected the onset of the afterglow emission at energies up to $\sim$13 TeV within about an hour after the burst, starting just a few minutes after the trigger. While this VHE emission component can be acc…