Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the exact measurement of the cosmic microwave background (CMB) with the Planck space observatory and many other measurements for example with the Hubble space telescope, the scientists were able to develop a precise model of our Universe. However, little is yet known about how these structures could form from the distribution of matter in the early universe.
In order to answer this question, theoretical astrophysicists work with cosmological, hydrodynamical simulations. They test their hypotheses about the universe by developing mathematical models that describe the underlying complex physical processes and run them on high-performance computers trying to reproduce the evolution of the Universe over billions of years. If the underlying assumptions are correct, the simulations should match the current astronomical observations and findings.
A group of astrophysicists led by Dr. Klaus Dolag from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich in close collaboration with the LRZ have now initiated "Cosmowebportal". This unique data centre for cosmological simulations provides access to the results of the world's most extensive set of cosmological hydrodynamic simulations, Magneticum Pathfinder, also developed by Klaus Dolag’s team and carried out at the LRZ.
The complete simulations are saved at the LRZ in Garching on a data store for large datasets, which is connected to the supercomputer SuperMUC. Using a web interface, interested scientists can, for example, select objects from the raw simulation data, process it, and even create virtual observations mimicing existing or future space telescopes.
"Large astronomical projects such as the space telescopes Euclid or eRosita, which are to be launched in the next few years, will observe large areas of the Universe, as well as provide further insight into the evolution of the first structures of the Universe so that the significance of cosmological hydrodynamic simulations will even increase in future,” says Klaus Dolag. "A data centre that pools and makes these simulations available therefore is an important facility for scientists working in the field."
Besides Klaus Dolag and Antonio Ragagnin, scientists from the following institutions were involved in the project: C2PAP, the data center of the Excellence Cluster Universe, LRZ, University of Trieste, the INAF Osservatorio Astronomico di Trieste and the Max Planck Computing and Data Facility.
Ragagnin et al.: „A web portal for hydrodynamical, cosmological simulations”, Astronomy and Computing, Vol. 20, July 2017; online 6 June 2017,
PD Dr. Klaus Dolag
University Observatory of the Ludwig-Maximilians-Universität Munich
Excellence Cluster Universe
Scheinerstraße 1, Munich, Germany
Tel: +49 (0) 89 2180 5994
Dr. Nicolay J. Hammer
Leibniz Supercomputing Centre (LRZ)
of the Bavarian Academy of Sciences
Boltzmannstraße 1, 85748 Garching n. Munich, Germany
Tel: +49 (0)89 35831 8072
Caption: Visualizations of the simulated distributions of gas and stars in the Universe from data provided by Cosmowebportal: The cube represents a space section of the Universe (more than 300 million light years), the bright spots on the cube faces show galaxies and galaxy clusters along the cosmic web. The first two disks zoom into the central galaxy cluster, the third disk (far right) demonstrates how an observation of the zoom area would look with an X-ray telescope ("virtual telescope").
Petra Riedel | idw - Informationsdienst Wissenschaft
Astronomy student discovers 17 new planets, including Earth-sized world
28.02.2020 | University of British Columbia
Explained: Why water droplets 'bounce off the walls'
27.02.2020 | University of Warwick
Researchers at the University of Bayreuth have discovered an unusual material: When cooled down to two degrees Celsius, its crystal structure and electronic properties change abruptly and significantly. In this new state, the distances between iron atoms can be tailored with the help of light beams. This opens up intriguing possibilities for application in the field of information technology. The scientists have presented their discovery in the journal "Angewandte Chemie - International Edition". The new findings are the result of close cooperation with partnering facilities in Augsburg, Dresden, Hamburg, and Moscow.
The material is an unusual form of iron oxide with the formula Fe₅O₆. The researchers produced it at a pressure of 15 gigapascals in a high-pressure laboratory...
Study by Mainz physicists indicates that the next generation of neutrino experiments may well find the answer to one of the most pressing issues in neutrino physics
Among the most exciting challenges in modern physics is the identification of the neutrino mass ordering. Physicists from the Cluster of Excellence PRISMA+ at...
Fraunhofer researchers are investigating the potential of microimplants to stimulate nerve cells and treat chronic conditions like asthma, diabetes, or Parkinson’s disease. Find out what makes this form of treatment so appealing and which challenges the researchers still have to master.
A study by the Robert Koch Institute has found that one in four women will suffer from weak bladders at some point in their lives. Treatments of this condition...
The operational speed of semiconductors in various electronic and optoelectronic devices is limited to several gigahertz (a billion oscillations per second). This constrains the upper limit of the operational speed of computing. Now researchers from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg, Germany, and the Indian Institute of Technology in Bombay have explained how these processes can be sped up through the use of light waves and defected solid materials.
Light waves perform several hundred trillion oscillations per second. Hence, it is natural to envision employing light oscillations to drive the electronic...
Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that the rough surface is formed by irreversible plastic deformation that occurs in many processes of mechanical machining of components such as milling.
Prof. Dr. Lars Pastewka from the Simulation group at the Department of Microsystems Engineering at the University of Freiburg and his team have simulated such...
12.02.2020 | Event News
16.01.2020 | Event News
15.01.2020 | Event News
28.02.2020 | Materials Sciences
28.02.2020 | Life Sciences
28.02.2020 | Architecture and Construction