MOSCOW, 17 Dec – RIA Novosti. Four probes MMS helped scientists to discover that the cosmic rays that pose a threat to human health, can be born in the remains of the dead distant stars due to the unusual ripple, “walking” in shock waves in supernova emissions, according to a paper published in the journal Physical Review Letters.
“The satellites of the MMS for the first time allowed us to obtain data on the structure of shock waves on such a small scale. The discovery of “ripples” in shock waves and direct observations it has enabled us to understand how such structures can arise and what properties they possess. We approached closer to understanding how a shock wave can generate cosmic rays,” says Andreas Ohlander (Andreas Johlander) from the Institute of space physics in Uppsala (Sweden).
Cosmic rays are heavy ions of various elements are accelerated to near-light speeds is a kind of natural “particle accelerator”, which, as scientists believe today, mostly speakers of a supernova. Today scientists are actively studying such rays, as they pose a threat to the normal operation of electronics, human health, and even were associated with a decrease in mental acuity in astronauts.
Particles of their remains in accordance with modern ideas, are accelerated to very high energies in the result generated by the explosion of a star, the shock wave collides with a previously discarded outer shells of the star, heats the material and forces of its atoms to “eject” out in the open interstellar medium.
Earlier, as notes Ohlander, scientists believed that this wave is essentially a flat object, which simply is faced with concentration of weight and gives them their energy. The Quartet of MMS probe, launched by NASA in March 2015, will allow physicists for the first time to check if they are really.
To do this, the authors of the article for a long time been watching what is happening on the border between the “magnetic shield” of the Earth that protects us from charged particles and solar wind, where there is a region similar to that which exists between the shock wave of the supernova and its dust “cocoon”.
In October last year, there was a powerful coronal mass ejections of plasma on the Sun, which “squeezed” the Earth’s magnetosphere and allowed the probes MMS “dip” to clean the solar wind plasma, and to follow what is happening in the point of its contact with the magnetic shield of the planet.
These observations unexpectedly revealed that in fact, in the shock wave there are structures which physicists have called “ripple” – periodic oscillations, reduces or increases the strength of the magnetic field. This ripple, if it exists inside of shock waves in a supernova can serve as one of the main mechanisms of acceleration and release of particles from the remains of dead stars, and further study of this process using probes MMS, as I hope Hoglander and his colleagues will help to understand how exactly this happens.