Astronomers record promptness spotted supernova
Astrophysicist from Europe and North America for the first time were able to trace the evolution of the former red supergiant after only three hours after the explosion of a supernova of type II. The outbreak in the neighboring the Milky Way galaxy NGC 7610, recorded in the world ...
Children of the stars: why astrophysicists so interesting supernova
European and North American astrophysicists for the first time managed to trace the loss of red supergiant after only three hours after the explosion of a supernova of type II. The outbreak in the neighboring the Milky Way galaxy NGC 7610, attracted the attention of a large number of scientists. The study of the first moments of life the supernova will allow us to better understand the processes of the universe, says astronomer, head of the department of physics and evolution of stars of the Institute of Astronomy Dmitry Wiebe .
Scientists are now fairly well understood processes that precede the destruction of massive stars, and their fate. Light, which is several tens of times heavier than the Sun, transformed first into red supergiants and then explode with the gravitational collapse of a super-bright flash, which can be observed even in the most distant galaxies.
"Supernova explosions - this is one of the most powerful phenomena that exist in our universe. This is one of the most powerful explosions, which are associated with a very large release of energy. And what is interesting for us is that the supernova explosion synthesize a significant amount of the chemical elements that make up the Earth, of which we ourselves are made up. And, of course, this phenomenon has attracted a lot of attention to themselves. On the one hand, interested himself explosion mechanism, and the processes that accompany the explosion. But with all the attention being paid to these objects, we still do not have a clear understanding of what is actually going on. We are witnessing an explosion, but we are unable to observe the very beginning of the outbreak, "- says a Russian scientist.
Indeed, the observation of supernova in real time before it was impossible because of their statistical rarity. For example, the available estimates indicate that a supernova exploded in the Milky Way, on average at least once a year. In the new study, scientists were able to trace the object in the galaxy NGC 7610, the spectral characteristics of which pointed to his extreme instability - fast weight loss. As expected, this has led to the appearance of the flash.
"We can not understand the trigger mechanism. It is therefore important to observe as early as possible, as quickly as possible. Not even in the first few minutes, and in the first few seconds of life of the space object. In fact, there occurs the most interesting in the first few seconds, as in any explosion. It is very important that the use of improved telescopes, we gradually begin to be chosen closer to the moment when there is a flash. The point is that it should be just in time to notice - in astronomy are usually all happens very slowly, and there is no need for some quick response, but in the case of the outbreak of a supernova - it is important to rapid response. It is important to notice it quickly and in time to bring back some powerful telescopes. And this, as you know, a very difficult task, because the point the telescope at random, it is simply impossible,"- continues to Dmitry vibe.
Note the spiral galaxy NGC 7610 is located in the constellation of Pegasus at a distance of 50.95 Mpc from Earth. Exploded in her object iPTF 13dqy is normal type II supernova. It was first observed in real time 6 October 2013, with the assistance of automated systems iPTF re - 50 minutes. Third time SN 2013fs observed a day using a scientific instrument WiFeS telescope the Australian National University.
"There's really important patrol system, important alert system. And thanks to the fact that these mechanisms begin to work better - we have an opportunity to learn more and more quickly to outbreaks. So it's a kind of victory, another step towards solving the mystery of the supernova," - says a Russian astronomer.
It is through constant patrolling of SN 2013fs began to observe almost all electromagnetic wavelengths - X-ray, ultraviolet, optical and infrared. Thus, the scientists were able to get the data, perfectly fit into the existing ideas about the evolution of the red supergiant - destroyed during the supernova explosion.
Thus, the destruction of the supergiant nucleus leads to the formation of a supersonic shock wave that reaches the surface of the star causes the star to shine brightly in the visible part of the radiation - what happens is that all of astrophysics is called a supernova explosion. At the same time regeneration of light is accompanied by intense ultraviolet radiation. The duration and strength of the flash depends on the structure of the progenitor star shell and its mass loss rate. However, the inhabitants of our planet should not be afraid, because the consequences of such an explosion next to the Earth we do not see.
"The nearest star, which can potentially become a supernova - is Betelgeuse. However, if it breaks out, then no harm will not cause the earth, as it is located very far away. There were carried out calculations and to represent some danger even for us, the outbreak should occur dozens of times closer ", - he concluded the expert.
As previously reported by Izvestia , astronomers have discovered in the center of the Milky Way Galaxy some of the oldest stars of the universe, which formed after only 300 million years after the Big Bang. | riafan