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Primeur weekly 2019-05-13

Exascale supercomputing

AMD EPYC CPUs, AMD Radeon Instinct GPUs and ROCm Open Source software to power world's fastest supercomputer at Oak Ridge National Laboratory ...

U.S. Department of Energy and Cray to deliver record-setting Frontier supercomputer at ORNL ...

Cray pursues advanced research with DOE for exascale systems ...

CAAR accepting application team proposals for Frontier system ...

Quantum computing

Computing faster with quasi-particles ...

Quantum computing with graphene plasmons ...

Focus on Europe

ELIXIR and GA4GH expand collaboration ...

Netherlands eScience Center labeled "Center of Excellence" by international review committee ...

HPC stakeholders in Europe get together at EuroHPC Summit Week 2019 ...

Middleware

DDN announces intent to acquire Nexenta, a market expert in Software-Defined Storage for 5G and IoT ...

Hardware

Austria's Central Institution for Meteorology and Geodynamics improves weather nowcasting with Cray AI solutions ...

Cray reports first quarter 2019 financial results ...

CoolIT Systems announces liquid cooling solution for Intel Server System S9200WK ...

Hewlett Packard Enterprise integrates BlueData to accelerate Artificial Intelligence and data-driven innovation in the enterprise ...

Intel previews design innovation: 10nm CPU ships in June and 7nm product in 2021 ...

WekaIO Matrix selected by Mellanox Technologies to accelerate EDA workloads ...

Applications

King's College London and NVIDIA build UK's first AI platform for NHS hospitals ...

Quantum sensor for photons ...

Comet-enabled simulations showcase black holes and their magnetic bubbles ...

Ultra-secure form of virtual money proposed ...

Shaping the future of finance with HPC ...

NCSA scientist employs supercomputer simulations in Ohio gerrymandering case ...

Superfacility framework advances photosynthesis research ...

The Cloud

Supermicro introduces open private Cloud solutions based on new Red Hat Enterprise Linux 8 ...

NetApp powers data-driven organisations to succeed ...

Comet-enabled simulations showcase black holes and their magnetic bubbles


These Comet-enabled images depict the hot, thick disk of plasma surrounding a black hole. As resolution and reconstruction order increases, more and thinner sheets of plasma appear while highly magnetized bubbles become more numerous. Credit: Christopher White, UC Santa Barbara.
7 May 2019 San Diego - When the Event Horizon Telescope team released the first picture ever taken of a black hole in mid-April, the general public became enamored by these mysterious phenomena and many questions quickly arose regarding this specific black hole, which sits in the middle of a galaxy coined Messier 87 (M87) - located approximately 55 million light years from Earth.

Christopher White, a computational astrophysicist at the Kavli Institute for Theoretical Physics at UC Santa Barbara, said that the powerful jets of particles surrounding the M87 black hole is a prime candidate for his research group's studies, which often rely on the Comet supercomputer at the San Diego Supercomputer Center (SDSC) at UC San Diego. Researchers also used Stampede2 at the Texas Advanced Computing Center (TACC), with both systems allocated through the Extreme Science and Engineering Discovery Environment (XSEDE), which is funded by the National Science Foundation (NSF).

White and his colleagues - James Stone, chair of the Department of Astrophysical Sciences at Princeton University; and Eliot Quataert, a professor of astronomy and physics at UC Berkeley - recently published a paper explaining their Comet-simulated black hole visualizations, which illustrate a scenario known as a magnetically arrested disk.

The paper, called " A Resolution Study of Magnetically Arrested Disks " and published in the April 2019 issue ofThe Astrophysical Journal, focused on the processes by which matter falls into these supermassive black holes in the centres of galaxies.

This specific scenario, which is similar to the M87 black hole, is studied by many researchers and involves a hot, thick disk of plasma and a strong magnetic field. Scientists have long believed that this magnetic field is responsible for launching the extremely powerful jets of particles and energy associated with some black holes.

In their study, Christopher White and his colleagues addressed whether the simulations of this scenario have sufficient resolution to yield trustworthy results. For most questions posed by the astrophysics community they do, though there are some results that may need higher resolutions or better numerical methods.

"We used Comet to run our large simulations that incorporate fluid dynamics, electromagnetism, and general relativity - showing as resolution and reconstruction order increases, more and thinner sheets of plasma appear while highly magnetized bubbles become more numerous", explained Christopher White. "These sorts of simulations are very computationally demanding and require very high resolution, which is why we used SDSC's petascale supercomputer."

The primary goal of the researchers' study was to show that as resolution increases, eventually the output of the computation stops changing because all of the relevant physical processes have been correctly modelled. Some 760,000 core-hours were used on Comet for the study.

"This research would not be possible without access to Comet and other supercomputers, as smaller university clusters would have taken years to generate our simulations", stated Christopher White.

Because black holes and their surroundings are some of the most extreme environments in the universe, they push the boundaries of our understanding of physics. Observational astronomers are now generating unprecedented data regarding these systems, allowing theorists to build better models for them. Christopher White and his colleagues now plan on continuing their work - possibly looking in much more detail at those jets surrounding the recently revealed M87.

"Figuring out how matter orbiting a black hole is ejected as a jet rather than being swallowed up is one of nature's persistent mysteries", stated SDSC Director Michael Norman, who also is a Distinguished Professor of Physics at UC San Diego where he directs the Laboratory for Computational Astrophysics. "Magnetic fields have long been implicated. These sophisticated simulations bring us a step closer to solving this mystery."

This research was supported in part by XSEDE grant number TG-AST170012. This work also used resources of the Argonne Leadership Computing Facility (ALCF) via the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) programme, and the Savio computational cluster resource provided by the Berkeley Research Computing programme at the UC Berkeley. This work was also supported in part by a Simons Investigator award from the Simons Foundation and NSF grants AST 13-33612 and AST 17-15054 (EQ).
Source: San Diego Supercomputer Center - SDSC

Back to Table of contents

Primeur weekly 2019-05-13

Exascale supercomputing

AMD EPYC CPUs, AMD Radeon Instinct GPUs and ROCm Open Source software to power world's fastest supercomputer at Oak Ridge National Laboratory ...

U.S. Department of Energy and Cray to deliver record-setting Frontier supercomputer at ORNL ...

Cray pursues advanced research with DOE for exascale systems ...

CAAR accepting application team proposals for Frontier system ...

Quantum computing

Computing faster with quasi-particles ...

Quantum computing with graphene plasmons ...

Focus on Europe

ELIXIR and GA4GH expand collaboration ...

Netherlands eScience Center labeled "Center of Excellence" by international review committee ...

HPC stakeholders in Europe get together at EuroHPC Summit Week 2019 ...

Middleware

DDN announces intent to acquire Nexenta, a market expert in Software-Defined Storage for 5G and IoT ...

Hardware

Austria's Central Institution for Meteorology and Geodynamics improves weather nowcasting with Cray AI solutions ...

Cray reports first quarter 2019 financial results ...

CoolIT Systems announces liquid cooling solution for Intel Server System S9200WK ...

Hewlett Packard Enterprise integrates BlueData to accelerate Artificial Intelligence and data-driven innovation in the enterprise ...

Intel previews design innovation: 10nm CPU ships in June and 7nm product in 2021 ...

WekaIO Matrix selected by Mellanox Technologies to accelerate EDA workloads ...

Applications

King's College London and NVIDIA build UK's first AI platform for NHS hospitals ...

Quantum sensor for photons ...

Comet-enabled simulations showcase black holes and their magnetic bubbles ...

Ultra-secure form of virtual money proposed ...

Shaping the future of finance with HPC ...

NCSA scientist employs supercomputer simulations in Ohio gerrymandering case ...

Superfacility framework advances photosynthesis research ...

The Cloud

Supermicro introduces open private Cloud solutions based on new Red Hat Enterprise Linux 8 ...

NetApp powers data-driven organisations to succeed ...