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We present the first stable release of Halotools (v0.2), a community-driven Python package designed to build and test models of the galaxy-halo connection. Halotools provides a modular platform for creating mock universes of galaxies…

We introduce NebulOS, a Big Data platform that allows a cluster of Linux machines to be treated as a single computer. With NebulOS, the process of writing a massively parallel program for a datacenter is no more complicated than writing a…

Instrumentation and Methods for Astrophysics · Physics 2016-09-15 Nathaniel R. Stickley , Miguel A. Aragon-Calvo

We present the Toolbox for Analysis and Large-scale Optimization of Spacecraft (TALOS), a framework designed for applying large-scale multidisciplinary design optimization (MDO) to spacecraft design problems. The framework is built using…

Optimization and Control · Mathematics 2023-03-28 Victor Gandarillas , John T. Hwang

Originally, tangles were invented as an abstract tool in mathematical graph theory to prove the famous graph minor theorem. In this paper, we showcase the practical potential of tangles in machine learning applications. Given a collection…

We present the full public release of all data from the TNG50, TNG100 and TNG300 simulations of the IllustrisTNG project. IllustrisTNG is a suite of large volume, cosmological, gravo-magnetohydrodynamical simulations run with the…

Halo is one of the most important basic elements in cosmology simulation, which merges from small clumps to ever larger objects. The processes of the birth and merging of the halos play a fundamental role in studying the evolution of large…

Graphics · Computer Science 2014-12-30 Guihua Shan , Maojin Xie , FengAn Li , Yang Gao , Xuebin Chi

A key ingredient for semi-analytic models (SAMs) of galaxy formation is the mass assembly history of haloes, encoded in a tree structure. The most commonly used method to construct halo merger histories is based on the outcomes of…

Astrophysics of Galaxies · Physics 2022-06-28 Sandra Robles , Jonathan S. Gómez , Adín Ramírez Rivera , Nelson D. Padilla , Diego Dujovne

Agent-based simulations, especially those including communication, are complex to model and execute. To help researchers deal with this complexity and to encourage modular and maintainable research software, the Python-based framework mango…

Multiagent Systems · Computer Science 2023-11-30 Rico Schrage , Jens Sager , Jan Philipp Hörding , Stefanie Holly

The Galactica simulation database is a platform designed to assist computational astrophysicists with their open science approach based on FAIR (Findable, Accessible, Interoperable, Reusable) principles. It offers the means to publish their…

Instrumentation and Methods for Astrophysics · Physics 2024-11-14 Damien Chapon , Patrick Hennebelle

Cosmological N-body simulations rank among the most computationally intensive efforts today. A key challenge is the analysis of structure, substructure, and the merger history for many billions of compact particle clusters, called halos.…

Cosmology and Nongalactic Astrophysics · Physics 2020-08-20 Esteban Rangel , Nicholas Frontiere , Salman Habib , Katrin Heitmann , Wei-keng Liao , Ankit Agrawal , Alok Choudhary

Algorithm Operating System (AlgOS) is an unopinionated, extensible, modular framework for algorithmic implementations. AlgOS offers numerous features: integration with Optuna for automated hyperparameter tuning; automated argument parsing…

Software Engineering · Computer Science 2025-04-08 Llewyn Salt , Marcus Gallagher

The Millennium Run is the largest simulation of the formation of structure within the $\Lambda$CDM cosmogony so far carried out. It uses $10^{10}$ particles to follow the dark matter distribution in a cubic region 500$h^{-1}$Mpc on a side,…

Astrophysics · Physics 2007-05-23 G. Lemson , the Virgo Consortium

We present Ringo, a system for analysis of large graphs. Graphs provide a way to represent and analyze systems of interacting objects (people, proteins, webpages) with edges between the objects denoting interactions (friendships, physical…

Merger trees harvested from cosmological $N$-body simulations encode the assembly histories of dark matter halos over cosmic time, and are a fundamental component of semi-analytical models (SAMs) of galaxy formation. The ability to compare…

Astrophysics of Galaxies · Physics 2019-02-20 Rhys J. J. Poulton , Aaron S. G. Robotham , Chris Power , Pascal J. Elahi

We present the public data release of halo and galaxy catalogues extracted from the EAGLE suite of cosmological hydrodynamical simulations of galaxy formation. These simulations were performed with an enhanced version of the GADGET code…

The halo model is a successful framework for describing the distribution of matter in the Universe -- from weak lensing observables to galaxy 2-point correlation functions. We review the basic formulation of the halo model and several of…

Cosmology and Nongalactic Astrophysics · Physics 2021-09-01 Steven G. Murray , Benedikt Diemer , Zhaoting Chen , Anton Glenn Neuhold , M. A. Schnapp , Tia Peruzzi , Daniel Blevins , Trent Engelman

We describe a new, free and open source semi-analytic model of galaxy formation, Galacticus. The Galacticus model was designed to be highly modular to facilitate expansion and the exploration of alternative descriptions of key physical…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Andrew J. Benson

Current Information Seeking (InfoSeeking) agents struggle to maintain focus and coherence during long-horizon exploration, as tracking search states, including planning procedure and massive search results, within one plain-text context is…

Computation and Language · Computer Science 2026-02-09 Tian Lan , Felix Henry , Bin Zhu , Qianghuai Jia , Junyang Ren , Qihang Pu , Haijun Li , Longyue Wang , Zhao Xu , Weihua Luo

The rise in computing hardware choices is driving a reevaluation of operating systems. The traditional role of an operating system controlling the execution of its own hardware is evolving toward a model whereby the controlling processor is…

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