The atmosphere of distant planets may hide signs of life

The search for life on distant ekzoplaneta is even more complex than was believed until now.

Signs of life on other planets could be hiding in the “deep trap” formed by the local currents of the atmosphere, reports Rus.Media.

The search for life on distant ekzoplaneta is even more complex than was believed until now. Computer simulations showed that the atmospheric currents can hide from the observations of a “classic” sign of biological activity, as the presence of ozone. About Ludmila Carone (Ludmila Carone) and her colleagues from the Institute of astronomy max-Planck-write in an article published in the journal Monthly Notices of the Royal Astronomical Society.

So far, the hope is to register signs of life from distant stars associated with the search for spectral traces of molecular oxygen formed from ozone. Oxygen is extremely active in the space, he quickly oxidizes the first compounds in the molecular form is not found. Free oxygen of earth’s atmosphere – the result of the activities of the biosphere. Because it is under the action of solar ultraviolet radiation produces ozone, which protects us from this dangerous radiation.

But even if the oxygen and ozone present in the atmosphere far and, in principle, habitable planets, to find them can be very difficult. Under the action of tidal forces of such famous potential “cradle of life”, as the TRAPPIST-1d or Proxima Centauri b are deployed all the time to their stars the same “day” party as the Moon is to Earth. Ludmila Carone and her co-authors conducted a simulation of atmospheric flows on these planets.

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The work showed that the presence of stable dividing line of day and night (terminator) has a noticeable effect on the movement of air and the distribution of ozone in the upper atmosphere. Main global flows they receive from the poles to the equator, and not Vice versa as on Earth. This leads to the accumulation of ozone in a narrow Equatorial region. “The absence of traces of ozone in the future observations should not automatically imply the absence of oxygen, – says Ludmila Carone. – It can be found in other areas, not as on Earth, or may very well hidden”.

On Earth, atmospheric currents carry ozone from the equator, where the radiation is particularly intense and the ozone formation is most likely, to the poles, allowing it pretty evenly distributed

This distribution of ozone can have an impact on the population is captured by the tidal forces of the planets. Scientists say that due to the lack of ozone, a large part of their surface that will be exposed to powerful sterilizes effect of UV radiation, and only some of the areas near the equator will remain suitable for a quiet life.

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