According to a new study in astrophysics, the researchers suggest in their research that the red dwarf stars might not emit enough UV light to kick-start the biological processes that are most familiar to our planet. It is known that certain levels of UV light might prove to be necessary for the formation of ribonucleic acid. This acid, however, is known for being a necessary component of all forms of life.

The research is focused on the study of red dwarfs (such as Proxima Centauri, TRAPPIST-1 and LHS 1140), which are smaller than the Sun, along with the planets that orbit them. According to the results gathered from previous studies, the red dwarfs may erupt in dramatic flares in UV. These flares may have a dramatic effect over the atmosphere, potentially harming life on surrounding planets.

According to the scientists, the chemistry depending on UV light might shut down at such low levels, and even when it is functional, it could operate at a much slower rate on Earth, possibly delaying the advent of life. The experts were determined to find out if the UV environment on the prebiotic Earth-analog planets would be sufficient to stimulate the photo-processes that could lead at the formation of RNA. As a result of these phenomena, the chemistry that depends on UV light to turn chemical elements and prebiotic conditions into biological organisms would most likely shut down. Besides this, if the chemistry was able to proceed under a diminished level of UV radiation, it would operate at a much slower rate than did on Earth billions of years ago.

One limitation of the study consists in the fact that only one example of life formed on a planet is known, and there is no certainty regarding the origin of life on Earth.

 

 

Sources:

https://www.universetoday.com/137023/ultraviolet-light-point-way-life-throughout-universe/

https://www.cfa.harvard.edu/news/2017-27

http://earthsky.org/space/ultraviolet-light-might-be-key-to-life-search-too

https://scitechdaily.com/ultraviolet-light-could-be-a-key-for-life-elsewhere-in-the-universe/