Another star system was sterilized from any possible life

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2018-04-04 10:00:06

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Another star system was sterilized from any possible life

From the report Eike Gunther from the German Observatory, Karl Schwarzschild submitted on scientific conference held in the framework of the European week of astronomy and space science, it became known that the powerful x-ray radiation resulting from the flare on the star AD Leo (Gliese 388), could "blow away" the ozone layer with any samplemodel planet, which hypothetically could be in this system.

Astronomers know that there are about 4,000 planets orbiting different stars. While quite a considerable number of them are earth-like planets that reside within so-called habitable zones, where the surface can be kept appropriate temperature suitable for the existence of water in liquid form. However, the majority of candidates samplemodeling wraps around class stars are red dwarfs.

These stars much smaller and cooler than our Sun, and therefore to create appropriate for the life conditions of the planets should be placed closer to the stars. The problem is that despite the generally peaceful nature, red dwarfs are able from time to time create x-ray radiation, accompanied by coronal mass ejections. Because "habitable" planets of red dwarfs are relatively close to stars, such outbreaks can pose a serious risk to life arising on their surface. Especially powerful coronal mass ejections can simply "blow" the atmosphere of the planet.

To accurately figure out the possible consequences of such emissions, the team of Gunter conducted a monitoring of red dwarfs, which could happen such emissions. And in February of 2018, scientists have actually recorded one such outbreak on the star AD Leo, also known as Gliese 388 (the flash, of course, occurred much earlier). Star is 16 light years from us and has 3 million miles (about 15 times closer than Earth is to the Sun) of the giant planet. Scientists are not yet sure, but it is possible that within this system, there may be other planets, also located in the habitable zone, however, see them using modern devices is not possible.

First observations showed that, in contrast to solar flares, the flare on AD Leo was not accompanied by coronal mass ejections. Therefore, the atmosphere closest to the star, the planet and more distant potentially habitable planets should not have to suffer.

However, further data analysis showed that the outbreak was accompanied by powerful radiation in the x-ray range. Scientists built the model showed that such radiation easily broke through the ozone layer potentially habitable planets, the thickness of which is comparable to the earth's ozone layer, and would destroy life on its surface. Moreover, such radiation could destroy a large part of the ozone layer in just two years. Thus, if the hypothetical planets of the system AD the Lion was life, it could only survive in the oceans. And it is doubtful.

In the future, the research group of Gunter collected on the basis of new observations to make your model more detailed. Some scientists have suggested that very large emission of radiation is able to deprive any planet 94 percent of its ozone layer that will lead to the death of all living things. If this claim is true, then count on the opening of the "Earth 2.0" from red dwarf will be premature.

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