You would imagine that a 500,000 kilometre long arch of super heated plasma releasing energy equal to the simultaneous explosion of 40 billion Hiroshima atomic bombs would be as easy to “hear” as it is to “see” – but it’s not. Astrophysicists have long thought about using the acoustic waves in these flares to understand more about these gigantic events, that can be dozens of times bigger than the Earth, but have been unable to use effectively up till now. Now researchers at the University of Warwick, and Lockheed Martin’s Solar and Astrophysics lab in Palo Alto, have found a way to “listen” to how these gigantic loops “shiver” - vastly increasing our ability to understand these huge events which are big enough to affect telecommunications, GPS satellites, and even energy supply lines.
Researchers at the University of Warwick and Lockheed Martin’s Solar and Astrophysics lab in Palo Alto have found a way to spot and use an intense “shivering” of flaring loops to get a clear look at their structure. The closest analogy is the attack of shivering we suffer having a severe cold or fever. But, a flaring coronal loop suffers from the temperature up to tens of million degrees Kelvin. The University of Warwick led team have found that they can use radio and X-ray observation to spot a shiver or oscillation in the really high temperature loops (around 20 million degrees Kelvin) that behaves like an acoustic (sound) wave.
Previously researchers had noted these acoustic oscillations but had paid little attention to them as they were convinced that they dissipated quickly and were therefore of little use. However University of Warwick researcher Dr Valery Nakariakov and his team have been able to prove that these oscillations do not dissipate quickly and can in fact be sustained over a period from 10 seconds to 5 minutes in length. This means the data from these oscillations is much more useful than previously thought and can now actually be used, in combination with other observations, to calculate both the temperature and the length of each of these individual great loops of plasma. These results are just one of the successes of a new method for remote diagnostic of astrophysical plasma by University Warwick physicists known as MHD seismology.
Peter Dunn | alfa
APEX takes a glimpse into the heart of darkness
25.05.2018 | Max-Planck-Institut für Radioastronomie
First chip-scale broadband optical system that can sense molecules in the mid-IR
24.05.2018 | Columbia University School of Engineering and Applied Science
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences