Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Cosmological simulations key to understanding the universe

18.02.2009
Tiziana Di Matteo, associate professor of physics at Carnegie Mellon University is harnessing the power of supercomputing to recreate how galaxies are born, how they develop over time and, ultimately, how they collapse.

Di Matteo will present an overview of her cosmological simulations as part of the "Big, Small, and Everything in Between: Simulating Our World Using Scientific Computing" session at the 2009 American Association for the Advancement of Science (AAAS) Annual Meeting in Chicago. Her session will be held at 1:30 p.m., Sunday, Feb. 15 in the Hyatt Regency Chicago Columbus Room GH.

Working with machines at Carnegie Mellon's Bruce and Astrid McWilliams Center for Cosmology and the Pittsburgh Supercomputing Center, Di Matteo crafts computer simulations to better understand the physics of black holes and the role they play in galaxy formation. The superior computing power available using computers like the Cray XT3 system allow Di Matteo to input the extensive calculations necessary to incorporate black hole physics into such simulations. In fact, such computing power has enabled Di Matteo to complete the most detailed and accurate recreation of the evolution of the universe to date.

The simulation begins with conditions seen at the birth of the universe as evidenced by observed cosmic microwave background radiation. Seeded with a quarter of a billion particles that represent everyday measurable matter, and factoring in gravity exerted by dark matter and other forces associated with various cosmic phenomena, including cooling gas, growing black holes and exploding stars, the simulation progresses, providing snapshots of galaxy development in frames of half a million years each. Strung together, the frames create a movie of cosmic evolution over the past 14 billion years. The high-resolution afforded to the researchers by the state-of-the-art computers allows them to zoom into a particular event in the galaxies formation, like the formation of a black hole.

Using data from such simulations, Di Matteo and colleagues have been able to get a better understanding of the role black holes play in galaxy regulation. The researchers hope that the theoretical simulations can be used to aid observational astrophysics by helping to predict what the next-generation telescopes should see as they peer back to the Big Bang, and by providing guidance to observational astrophysicists as they look to locate the earliest cosmic events and untangle the origins of the universe.

Jocelyn Duffy | EurekAlert
Further information:
http://www.cmu.edu

More articles from Physics and Astronomy:

nachricht Hope to discover sure signs of life on Mars? New research says look for the element vanadium
22.09.2017 | University of Kansas

nachricht Calculating quietness
22.09.2017 | Forschungszentrum MATHEON ECMath

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: The pyrenoid is a carbon-fixing liquid droplet

Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.

A warming planet

Im Focus: Highly precise wiring in the Cerebral Cortex

Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.

The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...

Im Focus: Tiny lasers from a gallery of whispers

New technique promises tunable laser devices

Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...

Im Focus: Ultrafast snapshots of relaxing electrons in solids

Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!

When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...

Im Focus: Quantum Sensors Decipher Magnetic Ordering in a New Semiconducting Material

For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.

Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

“Lasers in Composites Symposium” in Aachen – from Science to Application

19.09.2017 | Event News

I-ESA 2018 – Call for Papers

12.09.2017 | Event News

EMBO at Basel Life, a new conference on current and emerging life science research

06.09.2017 | Event News

 
Latest News

Rainbow colors reveal cell history: Uncovering β-cell heterogeneity

22.09.2017 | Life Sciences

Penn first in world to treat patient with new radiation technology

22.09.2017 | Medical Engineering

Calculating quietness

22.09.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>