16lh-called supernova ASASSN captures the attention of all enthusiasts and astronomers. The reason is quite simple and it is at its light power. Such concept had never been identified before. Observed in June 2015, the
A supernova called ASASSN-16lh captures the attention of all enthusiasts and astronomers. The reason is quite simple and it is at its light power. Such concept had never been identified before.
Observed in June 2015, the supernova SN-ASAS-15lh problem for astronomers who study for several months. Why ? Because “qu’ASAS-SN-15lh is the most powerful supernova ever found in mankind’s history” said Subo Dong, professor of astronomy at the University of Beijing (China).
In the journal Science and the Scientific announces this week that “the explosive mechanism and source of the power of the explosion and the energy released remains a mystery.”
This captivating explosion is 570 times more luminous than the Sun
This supernova can be described as amazing as it has nonetheless a significant potential is 570 times brighter than the sun. This is not the only feature that allows it to stand out in this sector, as it also has a larger heat. Astronomers have therefore studied this phenomenon to try to explain the situation. They believe that such amount of energy could be released due to its particular environment.
Even compared with other supernovae in the category of the most powerful discoveries for ten years, is ASASSN-15lh singles being warmer and not just brighter. The galaxy where the supernova lies is also without known precedent, explain the galaxy in which appears astronomes.La be ASASSN-15lh is larger and brighter than the Milky Way.
The supernova is located 3.8 billion light years from Earth
In an attempt to provide more information on this subject, the supernova will be scrutinized in minute detail by the telescope Hubble . Further study should also be created for this galactic environment which proves to be particular. Experts in this field point out that the galaxy has two peculiarities. It is both brighter and more massive than the Milky Way. It therefore had no more to excite the crowds and astronomers. According to preliminary investigations, the supernova is located 3.8 billion light-years of our planet.
Hubble to clarify the mystery
Even compared with other supernovae in the category more powerful discoveries for ten years ASASSN-15lh is distinguished by being more warm and not just brighter.
The galaxy where the supernova is also known lies without precedent, say the astronomers. Until then all the “super supernovae” were observed in low light and small galaxies where stars form much more quickly than in the Milky Way.
However, the galaxy in which appears be ASASSN-15lh is larger and brighter than the Milky Way. To these scientists, this particular environment may explain the galactic superpower of this supernova stars by creating capable of generating these huge amounts of energy exploding.
To clarify these and other mysteries this supernova, the research team will make observations with the Hubble Space Telescope.
A supernova is what?
A supernova is the cataclysmic explosion of a star which, for a time, can shine more vividly than an entire galaxy of hundreds of billions of stars. There are basically two main supernova families. SN II and SN Ia
Two families supernovae
The SN II occur when massive stars than about 10 solar masses to 8 have exhausted their nuclear fuel. This causes the gravitational collapse of the heart with the force of gravity is no longer offset by the pressure of radiation released by thermonuclear reactions. According to a still poorly understood scenario, a large amount of energy is released and eject the outer layers of the star, leaving only a neutron star or, in extreme cases, a black hole.
The SN Ia occur in a binary system that contains at least one white dwarf. It is probably fair to say that many old manuals of Astrophysics at least ten years explain the origin of supernovae SN Ia with a white dwarf accreting matter until the famous mass Chandrasekhar limit. It is known that the stars of the Milky Way mainly evolve couple. Many are less massive than the Sun, and like it, they will end their lives peacefully as a white dwarf. In theory at least, as if they are part of a binary star system containing a not yet arrived at the same stage of development, their fate may be even more spectacular. Thus, if they are sufficiently close to a red giant, or even a star on along the main sequence, the Demaree forces of the white dwarf may be such that a transfer of material from the star to the dwarf occurs , increasing its mass.
When it reaches 1.4 solar masses, the laws of quantum mechanics and special relativity make the inevitably unstable and must collapse. The process engages mainly thermonuclear fusion reactions of carbon and oxygen and an explosion occurs then, blowing all star.
As this explosion is constant mass its intrinsic brightness is slightly different. This is very important, SN Ia are therefore good distance indicators to gauge observable universe and study its expansion to billions of light years of the Milky Way. It is precisely these properties that allowed Saul Perlmutter and his colleagues highlight the accelerated expansion of the observable cosmos.
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