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Scientists across all disciplines increasingly rely on machine learning algorithms to analyse and sort datasets of ever increasing volume and complexity. Although trends and outliers are easily extracted, careful and close inspection will…

Instrumentation and Methods for Astrophysics · Physics 2021-09-16 T. H. Jarrett , A. Comrie , L. Marchetti , A. Sivitilli , S. Macfarlane , F. Vitello , U. Becciani , A. R. Taylor , J. M. van der Hulst , P. Serra , N. Katz , M. Cluver

The galaxy size-stellar mass and central surface density-stellar mass relationships are observational constraints on galaxy formation models. However, inferring the physical size of a galaxy from observed stellar emission is non-trivial due…

Cosmological simulations of structure formation predict that galaxies are dramatically modified by galaxy harassment during the assembly of galaxy clusters, losing a substantial fraction of their stellar mass which today must be in the form…

Astrophysics · Physics 2009-11-11 Magda Arnaboldi

Visualization techniques are well developed for many problem domains, but these systems break down for datasets which are very large or multidimensional. Techniques for data which is discrete rather than continuous are also less well…

Astrophysics · Physics 2007-05-23 Joel Welling , Mark Derthick

Mixed reality (MR) environments provide great value in displaying 3D virtual content. Systems facilitating co-located multiuser MR (Co-MUMR) experiences allow multiple users to co-present in a shared immersive virtual environment with…

Human-Computer Interaction · Computer Science 2025-01-07 Zhongyuan Yu , Daniel Zeidler , Krishnan Chandran , Lars Engeln , Kelsang Mende , Matthew McGinity

There has been an unprecedented and continuing growth in the volume, quality, and complexity of astronomical data sets over the past few years, mainly through large digital sky surveys. Virtual Observatory (VO) concept represents a…

Astrophysics · Physics 2007-05-23 S. G. Djorgovski , R. Brunner , A. Mahabal , R. Williams , R. Granat , P. Stolorz

The degree of complexity and, to a somewhat lesser degree, realism in simulations has advanced rapidly in the past few years. The simplest approach - modeling a cluster as collisionless dark matter and collisonal, non--radiative gas is now…

Astrophysics · Physics 2007-05-23 August E. Evrard

Recent advancements in deep learning, computer vision, and embodied AI have given rise to synthetic causal reasoning video datasets. These datasets facilitate the development of AI algorithms that can reason about physical interactions…

Artificial Intelligence · Computer Science 2021-08-16 Jiafei Duan , Samson Yu Bai Jian , Cheston Tan

All sciences, including astronomy, are now entering the era of information abundance. The exponentially increasing volume and complexity of modern data sets promises to transform the scientific practice, but also poses a number of common…

Astrophysics · Physics 2016-11-17 S. G. Djorgovski

It has been debated for a decade whether there is a large overabundance of strongly lensed arcs in galaxy clusters, compared to expectations from LambdaCDM cosmology. We perform ray tracing through the most massive halos of the Millennium…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Assaf Horesh , Dan Maoz , Stefan Hilbert , Matthias Bartelmann

We review progress in the development of physically realistic three dimensional simulated models of the galaxy.We consider the scales from star forming molecular clouds to the full spiral disc. Models are computed using hydrodynamic (HD) or…

Astrophysics of Galaxies · Physics 2013-04-01 Frederick A. Gent

Documents serve as a crucial and indispensable medium for everyday workplace tasks. However, understanding, interacting and creating such documents on today's planar interfaces without any intelligent support are challenging due to our…

Human-Computer Interaction · Computer Science 2024-11-19 Chen Chen

Mergers are an important aspect of galaxy formation and evolution. We aim to test whether deep learning techniques can be used to reproduce visual classification of observations, physical classification of simulations and highlight any…

Astrophysics of Galaxies · Physics 2019-06-12 W. J. Pearson , L. Wang , J. W. Trayford , C. E. Petrillo , F. F. S. van der Tak

An overview over the current status of modeling galaxies by means of numerical simulations is given. After a short description of how galaxies form in hierarchically clustering scenarios, success and failures of current simulations are…

Astrophysics · Physics 2007-05-23 Matthias Steinmetz

If properly calibrated, the shapes of galaxy clusters can be used to investigate many physical processes: from feedback and quenching of star formation, to the nature of dark matter. Theorists frequently measure shapes using moments of…

Cosmology and Nongalactic Astrophysics · Physics 2020-11-11 David Harvey , Andrew Robertson , Sut-Ieng Tam , Mathilde Jauzac , Richard Massey , Jason Rhodes , Ian G. McCarthy

Galactic globular clusters are old, dense star systems typically containing 10\super{4}--10\super{7} stars. As an old population of stars, globular clusters contain many collapsed and degenerate objects. As a dense population of stars,…

Solar and Stellar Astrophysics · Physics 2015-05-30 Matthew J. Benacquista , Jonathan M. B. Downing

We have undertaken a large set of simulations of galaxy interactions and mergers (GalMer Project) in order to study the physical processes related to galaxy encounters. All morphological types along the Hubble sequence are considered in the…

Astrophysics · Physics 2007-09-18 P. Di Matteo , F. Combes , I. Chilingarian , A. -L. Melchior , B. Semelin

After two decades of direct dynamical simulation of large-scale structure in the universe, it is safe to say the subject is now mature. Still, there are parts of the problem that are less well developed than others. In general, the…

Astrophysics · Physics 2007-05-23 August E. Evrard

Visualisation of data is critical to understanding astronomical phenomena. Today, many instruments produce datasets that are too big to be downloaded to a local computer, yet many of the visualisation tools used by astronomers are deployed…

Instrumentation and Methods for Astrophysics · Physics 2018-05-02 Bernard F Meade , Christopher J Fluke

Owing to their intricate variable density architecture, and as a principal site of star formation, molecular clouds represent one of the most functionally significant, yet least understood features of our universe. To unravel the intrinsic…

Instrumentation and Methods for Astrophysics · Physics 2021-09-08 Nia Imara , John C. Forbes , James C. Weaver