The most suitable for the search for extraterrestrial life was a neighborhood of older stars of class G and the class of young stars K.
Astronomers from the United States called the group of stars, which more than others are looking for the presence in their vicinity of potentially habitable exoplanets. Dedicated to this Preprint of a study published on the website arXiv.org.
The most suitable for the search for extraterrestrial life was a neighborhood of older stars of class G and young stars of the class K. In the first group the luminaries will go the Sun, and the second one includes cooler and larger stars. Objects of classes K and M, according to scientists, most likely are not suitable for the presence in their surroundings of life.
To such conclusions researchers came after examining the possible carbonate-silicate cycles on exoplanets. As a result of such processes on a celestial body must exist liquid water and to decrease the content of carbon dioxide in the atmosphere.
A key factor in the capture of carbon dioxide and its transport from the atmosphere to the lithosphere scientists see the plant. To maintain them in viable condition and to avoid a prolonged period of “Earth-snow” is possible, according to scientists, only if the physical and orbital properties of extrasolar planets will fall in a certain window of parameters.
