Tootfinder

Optimal annuitization with labor income under age-dependent force of mortality
Criscent Birungi, Cody Hyndman
https://arxiv.org/abs/2510.10371 https://arxi…

Optimal annuitization with labor income under age-dependent force of mortality
We consider the problem of optimal annuitization with labour income, where an agent aims to maximize utility from consumption and labour income under age-dependent force of mortality. Using a dynamic programming approach, we derive closed-form solutions for the value function and the optimal consumption, portfolio, and labor supply strategies. Our results show that before retirement, investment behavior increases with wealth until a threshold set by labor supply. After retirement, agents tend t…

Predictions of dust continuum observations of circumplanetary disks with ngVLA: A case study of PDS 70 c
Yuhito Shibaike, Takahiro Ueda, Misato Fukagawa
https://arxiv.org/abs/2508.00393

Predictions of dust continuum observations of circumplanetary disks with ngVLA: A case study of PDS 70 c
A gas giant forms a small gas disk called a "circumplanetary disk (CPD)" around the planet during its gas accretion process. The small gas disk contains dust particles like those in a protoplanetary disk, and these particles could be the building material of large moons. A young T Tauri star PDS 70 has two gas accreting planets, and continuum emission from one of the forming planets, PDS 70 c, has been detected by ALMA Bands 6 and 7, which is considered as the dust thermal emission from its CPD…

Methanol emission tracing ice chemistry and dust evolution in the TW Hya protoplanetary disk
John D. Ilee, Catherine Walsh, Jenny C. Calahan
https://arxiv.org/abs/2510.04106 htt…

Methanol emission tracing ice chemistry and dust evolution in the TW Hya protoplanetary disk
Methanol (CH$_{3}$OH) ice is abundant in space and is a key feedstock for seeding chemical complexity in interstellar and circumstellar environments. Despite its ubiquity, gas-phase methanol has only been detected in one disk around a Solar-type star to date, TW Hya. Here we present new high sensitivity (~1 mJy/beam) observations of TW Hya with ALMA that detect four individual transitions of gas-phase methanol spanning upper level energies from 17 to 38 K. We confirm the presence of gas-phase m…

Dynamical Pathways to the Misalignment of the VHS 1256-1257 System
Liz Holzknecht, Smadar Naoz, Cheyanne Shariat
https://arxiv.org/abs/2509.21452 https://a…

Dynamical Pathways to the Misalignment of the VHS 1256-1257 System
Circumbinary planets (CBPs) provide a unique window into planet formation and dynamical evolution in complex gravitational environments. Their orbits are shaped not only by the protoplanetary disk but also by the perturbations from two stellar hosts, making them sensitive probes of both early- and late-stage dynamical processes. In this work, we investigate the unusual architecture of the VHS J125601.92-125723.9 system, where a retrograde, nearly polar tertiary orbits an extremely low-mass subs…

Evidence For Turbulent Concentration In Particle-Laden Midplane Layers of Planet-Forming Disks
Orkan M. Umurhan, Debanjan Sengupta, Paul R. Estrada
https://arxiv.org/abs/2508.05858

Evidence For Turbulent Concentration In Particle-Laden Midplane Layers of Planet-Forming Disks
In this study we investigate the axisymmetric, weakly turbulent state of settled particle layers in a localized model of a protoplanetary disk. We focus on conditions in which the large-scale axisymmetric filaments typically associated with the streaming instability (SI) either cannot form or have not yet developed. Under these circumstances, we observe small-scale particle clumping consistent with turbulent concentration (TC), in which short particle filaments collect along regions of high gas…

A Morse complex for the homology of vanishing cycles
Aleksander Doan, Juan Mu\~noz-Ech\'aniz
https://arxiv.org/abs/2509.20685 https://arxiv.org/pdf/250…

A Morse complex for the homology of vanishing cycles
We construct Morse homology groups associated with any regular function on a smooth complex algebraic variety, allowing singular and non-compact critical loci. These groups are generated by critical points of a certain large pertubation of the function, built from a normal crossing compactification of the variety. They are canonically isomorphic to the homology of vanishing cycles and -- in the absence of bifurcations at infinity -- recover the hypercohomology of the perverse sheaf of vanishing…

Simulations of multiple dust ring formation in a subsolar-metallicity protoplanetary disk
Ryoki Matsukoba, Eduard I. Vorobyov, Takashi Hosokawa
https://arxiv.org/abs/2509.18449 …