Tootfinder

Theory of Exozodi Sources and Dust Evolution
Mark C. Wyatt, Tim D. Pearce, Nicole Pawellek, Sarah Dodson-Robinson, Virginie C. Faramaz-Gorka, Isabel Rebollido, Jessica K. Rigley, Christopher C. Stark
https://arxiv.org/abs/2508.11754

Theory of Exozodi Sources and Dust Evolution
Exozodiacal dust disks (exozodis) are populations of warm (~300K) or hot (~1000K) dust, located in or interior to a star's habitable zone, detected around ~25% of main-sequence stars as excess emission over the stellar photosphere at mid- or near-infrared wavelengths. Often too plentiful to be explained by an in-situ planetesimal belt, exozodi dust is usually thought to be transported inwards from further out in the system. There is no consensus on which (if any) of various proposed dynamical m…

Consistent Modeling of Non-equilibrium Dust Sublimation and the Interactions with Dust Evolution in the Inner Regions of Protoplanetary Disks
Sheng Xu, Lile Wang, Luis C. Ho, Renyue Cen, Shenzhen Xu
https://arxiv.org/abs/2509.11036

Consistent Modeling of Non-equilibrium Dust Sublimation and the Interactions with Dust Evolution in the Inner Regions of Protoplanetary Disks
The inner regions of protoplanetary disks are host to the sublimation of dust grains, a process traditionally modeled using equilibrium thermodynamics. We demonstrate through ab-initio density functional theory (DFT) and kinetic Monte Carlo (KMC) simulations that silicate dust sublimation is inherently a non-equilibrium kinetic process. The binding energies and vibrational frequencies governing desorption, calculated for MgSiO3 and other compositions, reveal that sublimation timescales far exce…

Lyman-$\alpha$ Escape through Anisotropic Media
Silvia Almada Monter, Max Gronke, Seok-Jun Chang
https://arxiv.org/abs/2509.19184 https://arxiv.org/pdf/250…

Lyman-$α$ Escape through Anisotropic Media
The escape of Lyman-$α$ (Ly$α$) radiation encodes valuable information on the neutral interstellar medium and is often used as a proxy for the escape of ionizing photons. Yet, the theory of Ly$α$ transfer through anisotropic gas distributions remains underdeveloped. We present Monte Carlo radiative transfer simulations of Ly$α$ propagation through porous, inhomogeneous neutral gas, systematically exploring the effects of channel geometry, outflows, dust, and lognormally distributed column d…

Inflation and Dark Energy from Loop Quantum Kaluza-Klein Cosmology
Shengzhi Li, Yongge Ma, Faqiang Yuan, Xiangdong Zhang
https://arxiv.org/abs/2508.07962 https://

Inflation and Dark Energy from Loop Quantum Kaluza-Klein Cosmology
The five-dimensional loop quantum Kaluza-Klein cosmology is constructed based on the symmetric reduction of the connection formulation of the full theory. Through semiclassical analysis, the effective scalar constraint for the cosmological model coupled with a dust field is derived, incorporating the quantum fluctuations of geometry as a subleading order correction. It demonstrates that the quantum model has the correct classical limit. The explicit solutions to the equations of motion show tha…