Named the possible inhabitants of the nearest exoplanets to Earth
Created: August 28, 2016
American scientists have called the possible type of residents recently discovered near the Sun. Earth-exoplanets.
Inhabit Proxima b are fluorescent organisms. Such animals are found in the world, usually in water, and contain special proteins, allowing them to glow under ultraviolet radiation. Fluorescence provides the body, scientists believe photoprotecting - protection from excessive light. Among such organisms, for example, include certain types of coral polyps.
Observation of fluorescence signals can be one of the ways to detect signs of life on Proxima b. The forecast of the conditions of observation of the existence of such organisms in the exoplanet. But there is a risk of confusion with radiation biofluorestsentsiyu minerals and other objects of inanimate nature.
These conclusions are valid if Proxima b emits in the near UV range (400-300 nm). For terrestrial organisms, such as reducing the emission wavelength and the transition to the X-ray range can be dangerous.
Research scientists from the EU and the US, published on the website arXiv.org, and taking into account the latest data on Proxima Centauri and Proxima b suggests that the star comes to exoplanets strong ultraviolet and X-ray radiation. Radiation from the first 30 times, while the second - 250 times stronger than on Earth. There's also been reported that the water in the exoplanet should be sufficient to consider it as a candidate to the inhabited worlds.
On the other hand, to protect from the stellar radiation could have a dense atmosphere of the exoplanet and its own magnetic field. Another recently published study showed that if Proxima b formed from chondrites, most likely, it does not have a strong magnetosphere.
Open scientists Proxima b exoplanet orbits the Sun to the nearest star - a red dwarf Proxima Centauri, producing intense x-ray (up to 400 times higher than the sun) and ultraviolet radiation, which can be dangerous for the emergence and existence of potential Earth-like life. This fact is one of the arguments against the existence of at Proxima b organisms.