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Astrophysics

Scientists Tap Supercomputing to Study Exotic Matter in Stars
2 days ago

Scientists Tap Supercomputing to Study Exotic Matter in Stars

By  •  2 days ago  •  Featured, Science

At the heart of some of the smallest and densest stars in the universe lies nuclear matter that might exist in never-before-observed exotic phases. Neutron stars, which form when the …
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DOE and NCSA Supercomputing Speed Studies into Black Hole Origins
8 months ago

DOE and NCSA Supercomputing Speed Studies into Black Hole Origins

By  •  8 months ago  •  Featured, Science

Five years ago this month, the Laser Interferometer Gravitational-wave Observatory, or LIGO, made its first detection of gravitational waves, marking a historic event in the astrophysics community. Since then, LIGO …
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OLCF Names New Director of Science
11 months ago

OLCF Names New Director of Science

By  •  11 months ago  •  People

Bronson Messer—a computational astrophysicist, Distinguished Scientist in the Scientific Computing and Theoretical Physics groups at the US Department of Energy’s (DOE’s) Oak Ridge National Laboratory (ORNL), and a former Jeopardy!
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Simulating the Stars at Exascale Requires HIP Solutions
1 year ago

Simulating the Stars at Exascale Requires HIP Solutions

By  •  1 year ago  •  Technology

As GPU architectures have become the standard for scientific computing, application teams have had to retrofit their scientific codes to run on new systems. Even teams with codes that have …
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The Last User of Titan
1 year ago

The Last User of Titan

By  •  1 year ago  •  People, Science

Titan, the groundbreaking Cray XK7 supercomputer operated by the Oak Ridge Leadership Computing Facility (OLCF) at the US Department of Energy’s (DOE’s) Oak Ridge National Laboratory (ORNL), was officially decommissioned …
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Galactic Winds Demystified
2 years ago

Galactic Winds Demystified

By  •  2 years ago  •  Featured, Science

Using the Titan supercomputer at the US Department of Energy’s Oak Ridge National Laboratory, a team of astrophysicists created a set of galactic wind simulations of the highest resolution ever …
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PPPL’s Will Fox Honored for Research on Titan
2 years ago

PPPL’s Will Fox Honored for Research on Titan

By  •  2 years ago  •  Science

Will Fox, a research scientist at the US Department of Energy’s (DOE’s) Princeton Plasma Physics Laboratory (PPPL) and long-time user of the Oak Ridge Leadership Computing Facility (OLCF), has received …
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Science at Exascale: Tracing the Origins of Matter in Star Explosions
2 years ago

Science at Exascale: Tracing the Origins of Matter in Star Explosions

By  •  2 years ago  •  Science

Frontier is an exascale computer planned for delivery at the Oak Ridge Leadership Computing Facility in 2021. The system will support a wide range of scientific applications for advanced modeling …
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OLCF Scientist Talks Early Summit Results at APS Meeting
2 years ago

OLCF Scientist Talks Early Summit Results at APS Meeting

By  •  2 years ago  •  People

Bronson Messer, a computational scientist at the Oak Ridge Leadership Computing Facility (OLCF), gave an invited talk at the American Physical Society’s (APS’s) “Quarks to the Cosmos” April meeting in …
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OLCF 25: Revealing Supernova Secrets
3 years ago

OLCF 25: Revealing Supernova Secrets

By  •  3 years ago  •  OLCF History

In 2017, the Oak Ridge Leadership Computing Facility celebrated 25 years of leadership in high-performance computing. This article is part of a series summarizing a dozen significant contributions to science …
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OLCF 25: Illuminating Dark Matter
3 years ago

OLCF 25: Illuminating Dark Matter

By  •  3 years ago  •  OLCF History

In 2017, the Oak Ridge Leadership Computing Facility celebrated 25 years of leadership in high-performance computing. This article is part of a series summarizing a dozen significant contributions to science …
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OLCF Team Resolves Performance Bottleneck in OpenACC Code
5 years ago

OLCF Team Resolves Performance Bottleneck in OpenACC Code

By  •  5 years ago  •  Technology

A team at the Oak Ridge Leadership Computing Facility recently addressed a performance bottleneck in one portion of an OLCF user’s application. Because of its efforts, the user’s team saw a sixfold performance improvement in the code.
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Delving into the Dark Sky
5 years ago

Delving into the Dark Sky

By  •  5 years ago  •  Science

When Mike Warren was a graduate student 20 years ago, computational astrophysicists were conducting simulations of the universe’s structure with a million particles representing large masses of matter like galaxy …
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Illuminating the Universe’s Ignition
5 years ago

Illuminating the Universe’s Ignition

By  •  5 years ago  •  Science

A multi-institution team has been using Titan to create the largest fully-coupled simulation of the universe’s Epoch of Reionization.
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Titan Helps Researchers Explore Explosive Star Scenarios
5 years ago

Titan Helps Researchers Explore Explosive Star Scenarios

By  •  5 years ago  •  Science

Using Titan, researchers at Stony Brook University completed a three-dimensional, high-resolution investigation of the thermonuclear burning a double-detonation white dwarf undergoes before explosion.
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Mastering Magnetic Reconnection
6 years ago

Mastering Magnetic Reconnection

By  •  6 years ago  •  Science

For 5 years a team led by William Daughton of Los Alamos National Laboratory has been simulating magnetic reconnection in space using the Cray XK7 Titan supercomputer and its predecessor, the Cray XT5 Jaguar supercomputer. The team’s simulations support the National Aeronautics and Space Administration’s Magnetospheric Multiscale Mission.
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