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In magnetically confined fusion plasmas, the role played by zonal E$\times$B flow shear layers in the suppression of turbulent transport is relatively well-understood. However, less is understood about the role played by the weak shear…

Plasma Physics · Physics 2026-02-27 Norman M. Cao , Hongxuan Zhu , Gabriel C. Grime , Timothy Stoltzfus-Dueck

We present 3D-Barolo, a new code that derives rotation curves of galaxies from emission-line observations. This software fits 3D tilted-ring models to spectroscopic data-cubes and can be used with a variety of observations: from HI and…

Astrophysics of Galaxies · Physics 2015-06-01 Enrico Di Teodoro , Filippo Fraternali

Torus networks of moderate degree have been widely used in the supercomputer industry. Tori are superb when used for executing applications that require near-neighbor communications. Nevertheless, they are not so good when dealing with…

Distributed, Parallel, and Cluster Computing · Computer Science 2013-11-11 Cristóbal Camarero , Carmen Martínez , Ramón Beivide

We describe a new adaptive timestep criterion for integrating gravitational motion, which uses the tidal tensor to estimate the local dynamical timescale and scales the timestep proportionally. This provides a better candidate for a truly…

Instrumentation and Methods for Astrophysics · Physics 2020-06-23 Michael Y. Grudić , Philip F. Hopkins

Context: Active galactic nuclei (AGN) are anisotropic objects surrounded by an optically thick equatorial medium whose true geometry still defy observers. Aims: In this paper, we aim to explore the optical, scattering-induced, polarization…

Astrophysics of Galaxies · Physics 2017-11-15 F. Marin , M. Schartmann

The gravitational properties of a torus are investigated. It is shown that a torus can be formed from test particles orbiting in the gravitational field of a central mass. In this case, a toroidal distribution is achieved because of the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Elena Yu. Bannikova , Victor G. Vakulik , Alexey V. Sergeev

The advent of high-angular resolution IR and sub-mm interferometry allows for spatially-resolved observations of the parsec-scale environment of active galactic nuclei (AGN), commonly referred to as the "torus." While molecular lines show…

Astrophysics of Galaxies · Physics 2019-11-06 Sebastian F. Hönig

We present upgraded infrastructure for Searches after Gravitational Waves Using ARizona Observatories (SAGUARO) during LIGO, Virgo, and KAGRA's fourth gravitational-wave (GW) observing run (O4). These upgrades implement many of the lessons…

We describe new functionality in the GYRE stellar oscillation code for modeling tides in binary systems. Using a multipolar expansion in space and a Fourier-series expansion in time, we decompose the tidal potential into a superposition of…

Solar and Stellar Astrophysics · Physics 2023-03-15 Meng Sun , R. H. D. Townsend , Zhao Guo

Near-Eddington radiation from active galactic nuclei (AGNs) has significant dynamical influence on the surrounding dusty gas, plausibly furnishing AGNs with geometrically thick obscuration. We investigate this paradigm with radiative…

Astrophysics of Galaxies · Physics 2017-08-21 Chi-Ho Chan , Julian H. Krolik

We present an automated framework for constructing Taylor series expansions of rovibrational kinetic and potential energy operators for arbitrary molecules, internal coordinate systems, and molecular frame embedding conditions. Expressing…

Atomic and Molecular Clusters · Physics 2025-07-29 Andrey Yachmenev , Emil Vogt , Álvaro Fernández Corral , Yahya Saleh

Substantial evidence points to dusty, geometrically thick tori obscuring the central engines of active galactic nuclei (AGNs), but so far no mechanism satisfactorily explains why cool dust in the torus remains in a puffy geometry.…

Astrophysics of Galaxies · Physics 2016-07-04 Chi-Ho Chan , Julian H. Krolik

Physics-informed learning has shown to have a better generalization than learning without physical priors. However, training physics-informed deep neural networks requires some aspect of physical simulations to be written in a…

Machine Learning · Computer Science 2020-10-06 Muhammad F. Kasim , Sam M. Vinko

We investigate the emission of active galactic nuclei (AGN) dusty tori in the infrared domain. Following theoretical predictions coming from hydrodynamical simulations, we model the dusty torus as a 3D two-phase medium with high-density…

Cosmology and Nongalactic Astrophysics · Physics 2012-02-29 Marko Stalevski , Jacopo Fritz , Maarten Baes , Theodoros Nakos , Luka C. Popovic

We introduce bindings that enable the convenient, efficient, and reliable use of software modules of CGAL (Computational Geometry Algorithm Library), which are written in C++, from within code written in Python. There are different tools…

Computational Geometry · Computer Science 2023-06-08 Nir Goren , Efi Fogel , Dan Halperin

In the tropical projective torus, it is not guaranteed that the projection of a Fermat-Weber point of a given data set is a Fermat-Weber point of the projection of the data set. In this paper, we focus on the projection on the tropical…

Combinatorics · Mathematics 2021-08-24 Weiyi Ding , Xiaoxian Tang

A torus manifold is an even-dimensional manifold acted on by a half-dimensional torus with non-empty fixed point set and some additional orientation data. It may be considered as a far-reaching generalisation of toric manifolds from…

Algebraic Topology · Mathematics 2007-05-23 Mikiya Masuda , Taras Panov

Follow-up of gravitational wave alerts has proven to be challenging in the past due to the large uncertainty on the localisation, much larger than the field of view of most instruments. A smart pointing strategy helps to increase the chance…

Instrumentation and Methods for Astrophysics · Physics 2023-12-15 Mathieu de Bony de Lavergne , Halim Ashkar , Atilla Kaan Alkan , Jayson Mourier , Patrick Reichherzer , Fabian Schüssler , Monica Seglar-Arroyo

Invariant tori in phase space can be constructed via a nonperturbative canonical transformation applied to a known integrable Hamiltonian H. Hitherto, this process has been carried through with H corresponding to the isochrone potential and…

Mathematical Physics · Physics 2014-03-04 Teemu Laakso , Mikko Kaasalainen

We investigated the gravitational microlensing of active galactic nucleus dusty tori in the case of lensed quasars in the infrared domain. The dusty torus is modeled as a clumpy two-phase medium. To obtain spectral energy distributions and…

Cosmology and Nongalactic Astrophysics · Physics 2012-09-04 Marko Stalevski , Predrag Jovanović , Luka Č. Popović , Maarten Baes
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