Sun evolution as a astrobiology factor of life evolution
Abstract
The report emphasizes the need to consider the evolution dynamics of Sun modeling of formation and development of life for the astrobiology problems. The life processes occurring within ancient environments, not only depended on stress factors (e.g. temperature, pressure, pH and chemicals), but especially on the type of emission spectrum of the early sun and extreme intensity of cosmic rays. 4 billion years ago the early Sun was significantly different from the current state of the main star of our planetary system. The intensity of the Sun in X-ray and ultraviolet spectral regions was much higher in the modern age than in the era of the formation of life, as shown by IZMIRAN investigations, 2011 (no the total luminosity was about 70% from the current level). Solar activity was also more intensive and chaotic. The intensity of cosmic rays exceeds the current level by several orders of magnitude. It is known that cosmic rays are a powerful factor of evolution, but their excess leads to the destruction biological systems. Perhaps the time of appearance of life was determined at the moment of transition of solar activity at a more orderly functioning. Therefore, the evolutionary dynamics of the Sun must be taken into account to construct models of the earth's life in extreme environments, as well as the construction of displacement models of life within the solar system.
- Publication:
-
39th COSPAR Scientific Assembly
- Pub Date:
- July 2012
- Bibcode:
- 2012cosp...39.1555R