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Simulating The Dynamical Evolution Of Galaxies In Group And Cluster Environments

Rukmani Vijayaraghavan, Paul Ricker
2015 Zenodo  
Using dark matter only as well as hydrodynamic simulations of cluster mergers with random ensembles of particles tagged with galaxy models, I quantify the effects of cluster mergers on galaxy evolution  ...  Galaxy clusters are harsh environments for their constituent galaxies.  ...  present in a cosmological simulation.  ... 
doi:10.5281/zenodo.1036756 fatcat:kn3canfszffjfcxdjoag5ix5fy

Figuring Out Gas & Galaxies in Enzo (FOGGIE). I. Resolving Simulated Circumgalactic Absorption at 2 ≤ z ≤ 2.5

Molly S. Peeples, Lauren Corlies, Jason Tumlinson, Brian W. O'Shea, Nicolas Lehner, John M. O'Meara, J. Christopher Howk, Nicholas Earl, Britton D. Smith, John H. Wise, Cameron B. Hummels
2019 Astrophysical Journal  
In contrast to most extant simulations of galaxy formation, which concentrate computational resources on galactic disks and spheroids with fluid and particle elements of fixed mass, the FOGGIE simulations  ...  These results indicate that CGM resolution is key in properly testing simulations of galaxy evolution with circumgalactic observations.  ...  The initial conditions for the Tempest halo were then regenerated using the "cosmological zoom" method, with a 256 3 grid cell/particle base resolution and an effective resolution of 4,096 3 particles  ... 
doi:10.3847/1538-4357/ab0654 fatcat:2nsha6fnjjfbrhw6vdakmhujue

Cosmic microwave background map-making at the petascale and beyond

Rajesh Sudarsan, Julian Borrill, Christopher Cantalupo, Theodore Kisner, Kamesh Madduri, Leonid Oliker, Yili Zheng, Horst Simon
2011 Proceedings of the international conference on Supercomputing - ICS '11  
In this work we take the current stateof-the-art simulation and mapping software and investigate its performance when pushed to tens of thousands of cores on a range of leading HPC systems, in particular  ...  We present a new communication strategy that removes this bottleneck, allowing for CMB analyses of unprecedented scale and hence fidelity.  ...  Tiny fluctuations in the CMB across the sky encode not only the basic parameters of cosmology, but also, using the Big Bang as the ultimate particle accelerator, insights into fundamental physics at energies  ... 
doi:10.1145/1995896.1995944 dblp:conf/ics/SudarsanBCKMOZS11 fatcat:4etfpyhpbnfbtj63foexy75hkm

Software challenges in extreme scale systems

Vivek Sarkar, William Harrod, Allan E Snavely
2009 Journal of Physics, Conference Series  
More recent work is investigating how PIM-like ideas may port into quantum cellular array (QCA) and other nanotechnology logic, where in-stead of "Processing-In-Memory" we have opportunities for "Processing-In-Wire  ...  Carlson is a member of the research staff at the IDA Center for Computing Sciences where, since 1990, his focus has been on applications and system tools for large-scale parallel and distributed computers  ...  In very rough terms the code is: for each timestep { if(neighborListsStale()) { forall particle in particles { particle.neighbors = computeNeighbors(particle) ; } } forall particle in particles { forall  ... 
doi:10.1088/1742-6596/180/1/012045 fatcat:iukutry2dvbitfdh6ng7kgz564

Pathway to the Square Kilometre Array - The German White Paper - [article]

F. Aharonian, T. G. Arshakian, B. Allen, R. Banerjee, R. Beck, W. Becker, D. J. Bomans, D. Breitschwerdt, M. Brüggen, A. Brunthaler, B. Catinella, D. Champion (+57 others)
2013 arXiv   pre-print
as the essential facilities for European research in astronomy.  ...  This "White Paper" outlines the German science and R&D interests in the SKA project and will provide the basis for future funding applications to secure German involvement in the Square Kilometre Array  ...  ,et al., 2009b, in: Wide Field Astronomy and Technology for the Square Kilometre Array, eds. S. A.  ... 
arXiv:1301.4124v1 fatcat:2gqq3xjnjbcxhnf36w3au7imvq

High-Performance Astrophysical Simulations and Analysis with Python [article]

Matthew J. Turk Columbia University,
2011 arXiv   pre-print
We present on its mechanisms for data access, capabilities for MPI-parallel analysis, and its implementation as an in situ analysis and visualization tool.  ...  in a consistent manner, focusing on physically relevant quantities rather than quantities native to astrophysical simulation codes.  ...  O'Shea, Jorge Poco, and George Zagaris for thoughtful discussions. yt has been supported directly or indirectly over the years by a number  ... 
arXiv:1112.4482v1 fatcat:jhrqmslf6fgubeya3ewikvxnqu

Project X: Physics Opportunities [article]

Andreas S. Kronfeld, Robert S. Tschirhart, Usama Al-Binni, Wolfgang Altmannshofer, Charles Ankenbrandt, Kaladi Babu, Sunanda Banerjee, Matthew Bass, Brian Batell, David V. Baxter, Zurab Berezhiani, Marc Bergevin, Robert Bernstein, Sudeb Bhattacharya, Mary Bishai (+111 others)
2016 arXiv   pre-print
In this Part, we outline the particle-physics program that can be achieved with Project X, a staged superconducting linac for intensity-frontier particle physics.  ...  Topics include neutrino physics, kaon physics, muon physics, electric dipole moments, neutron-antineutron oscillations, new light particles, hadron structure, hadron spectroscopy, and lattice-QCD calculations  ...  A tracking program has been developed to accurately simulate the spin and beam dynamics of the stored particles in the all-electric ring.  ... 
arXiv:1306.5009v3 fatcat:dshkmdren5fqxgkjxediotc4py

French SKA White Book - The French Community towards the Square Kilometre Array [article]

F. Acero, J.-T. Acquaviva, R. Adam, N. Aghanim, M. Allen, M. Alves, R. Ammanouil, R. Ansari, A. Araudo, E. Armengaud, B. Ascaso, E. Athanassoula (+157 others)
2018 arXiv   pre-print
The deployment of the SKA will take place in two sites, in South Africa and Australia, and in two successive phases.  ...  From its Phase 1, the SKA will be one of the most formidable scientific machines ever deployed by mankind, and by far the most impressive in terms of data throughput and required computing power.  ...  For this purpose, it will be crucial to realise realistic cosmological simulations that can be compared directly to the observed velocity and density fields in the Universe, eventually considering not  ... 
arXiv:1712.06950v3 fatcat:t22beqb7s5brtomaqqeroetmyu

The Einstein Toolkit: a community computational infrastructure for relativistic astrophysics

Frank Löffler, Joshua Faber, Eloisa Bentivegna, Tanja Bode, Peter Diener, Roland Haas, Ian Hinder, Bruno C Mundim, Christian D Ott, Erik Schnetter, Gabrielle Allen, Manuela Campanelli (+1 others)
2012 Classical and quantum gravity  
The toolkit is under continuous development and contains many new code components that have been publicly released for the first time and are described in this article.  ...  We describe the Einstein Toolkit, a community-driven, freely accessible computational infrastructure intended for use in numerical relativity, relativistic astrophysics, and other applications.  ...  Any opinion, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.  ... 
doi:10.1088/0264-9381/29/11/115001 fatcat:r46z6siicvb2veqjhmva7kryai

The Frontiers of Nuclear Science, A Long Range Plan [article]

The DOE/NSF Nuclear Science Advisory Committee
2008 arXiv   pre-print
This is a copy of the 2007 report prepared by the DOE/NSF Nuclear Science Advisory Committee in response to the charge from DOE and NSF to "conduct a study of the opportunities and priorities for U.S.  ...  nuclear physics research and recommend a long range plan that will provide a framework for coordinated advancement of the nation's nuclear science research programs over the next decade."  ...  In Search of the New Standard Model The axes give relevant supersymmetric particle masses (µ and M 1 ). The hatched region indicates allowed values for the observed baryon asymmetry of the universe.  ... 
arXiv:0809.3137v1 fatcat:jr7exfxxizatdevyno7ew5jck4

Binary Neutron Star Mergers [article]

Joshua A. Faber, Frederic A. Rasio
2012 arXiv   pre-print
Finally, we discuss the likely directions for the field as we transition from the first to the second generation of gravitational-wave interferometers and while supercomputers reach the petascale frontier  ...  Next, we turn to the quasi-equilibrium formalisms that are used to study binaries prior to the merger phase and to generate initial data for fully dynamical simulations.  ...  The asterisk for the KT collaboration's MHD column indicates that they have used an MHD-based code for other projects, but not yet for NS-NS merger simulations.  ... 
arXiv:1204.3858v1 fatcat:kx3xog6wq5adnkqvv5y5tk3eqe

GPU Computational Methods for Planet Formation and Exoplanet Characterisation

Simon Grimm
2015
In the absence of a complete theory, we (and others before us) have applied an ad hoc cutoff of the line wing for our calculations.  ...  S.L.G. and K.H. acknowledge support from the Swiss National Science Foundation and the Swiss-based MERAC Foundation for grants awarded to the Exoclimes Simulation Platform (www.exoclime.org).  ...  GENGA was developed and tested on the GPU Tasna cluster which was purchased as part of the HP2C project "Computational Cosmology on the Petascale".  ... 
doi:10.5167/uzh-123117 fatcat:lb5ro2cnhzfbdfywxibnwp2ymy