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System of binary stars – probable refuge for extraterrestrial life
System of binary stars – probable refuge for extraterrestrial life March 13, 2013
Binary stars (so-called binary star system) with low mass may be a better home for extraterrestrial life, as their total energy increases potentially habitable region, in contrast to the single stars. Recently, we have more to say about life probably exists outside of our blue planet . The remains of algae brought meteorite , Kyuriositi found strong evidence of life on Mars … What’s next? Panspermia confidently stated as evidence of extraterrestrial origin of life on Earth.
The planets orbiting binary star system, deal with several sources of tidal forces produced by gravity. But recent studies suggest that the closely woven stars can be much better than the single when it comes to the alleged inhabited regions. It looks particularly twins with low weight.
In the simulation of various binary systems, astronomers found that stars with a mass of 80% of the sun, at sufficiently close together to each other, are ideal for fixing them habitable planets. The number of suspects narrowed humanity gradually acquires more focused guidance for future settlement or … cooperation.
“Life has more chances to blossom in binary systems than in singles,” – said John Clark, a student at the State University of New Mexico. Clark worked with astrophysicist Paul Mason of the University of Texas at El Paso.
Expanding the boundaries of
Thus, low-mass stars, more or less similar to the sun. Data on their exact location can give us a tip on interesting exoplanets. But their smaller size also requires a strong ultraviolet radiation of a star in the early solar winds and dangerous in the habitable zone. This significantly reduces the chance of a lifetime to develop. Planet must be very close to a small single stars to take advantage of the proximity of this, but this position gives rise to many problems. Usually, such planets are often addressed only one side of the Sun, and this is subjected to impact every aspect of solar activity.
But when the two stars are closely intertwined, with total energy substantially expands the inhabited area, minimizing the number of threats facing the planet, orbiting a low-mass stars.
“We have a room appear larger, which may hang the planet” – says Clark.
By the way, not only binary systems have the “right to life”. Habitable zones get the best conditions in which low-mass stars revolve around each other for ten days or less. All types of radiation in this case will be more consistent, and planets revolving around them, will have to deal with almost a single star.
When the stars moving away from each other, the orbit of the planet can be volatile, as it will change constantly feel the attraction of the one and the other stars. When the stars are at substantial distance, orbiting the planet will experience severe temperature changes. The planet will be literally “ride” from one to another star.
“There are many areas around the binary systems, where the presence of a stable orbit is impossible”, – says Steven Kane at the California Institute of Technology. Kane, who studies potentially habitable zones around binary stars, does not know about the work of Clark and Mason.
Right to life
Living conditions on the planet will depend on many factors. Of clouds, which will protect the stone ball from the effects of UV radiation. Moreover, the clouds would protect the planet in case of transition from orbit one star to another.
Clark and Mason modeled the number of closed binary systems, calculate the temperature and radiation, which should be near the rotating planet. As it turned out, the most stable situation will arise, subject to the “twins” with about the same mass. Two stars with a mass of 80% of the sun – a “golden mean”, according to Clark, while some other likely situation can also cope with asylum perfectly.
Potentially habitable zone around binary stars extends to 40% more than the “one-star” competition.
“Recently, other groups have shown that the planets that are close to the stars of any type, will suffer from the loss of water as Venus, and atmospheric erosion, especially in the early stages of a star’s life. These effects can be triggered even for planets with protective magnetic field, “- said Mason. – “The beauty of closed binary systems is that they potentially habitable zone spreads very far.”
Kepler-47 is a planet with curious characteristics. Instead of the twin suns famous “Tatooine system” has a star with a mass of our Sun, and the second, three times smaller. The only planet that rotates in the potential habitat, it looks too heavy to be a good candidate for the settlement of aliens. Big star someday suffer the same fate of our sun, turning it into a massive red giant and changing the conditions of life on planets orbiting a pair of stars. Smaller star will live, providing comfort to the planets, which will take the shift zone of habitability. But while the big star will wither, less provide additional heat and light, giving the right to life of potential microorganisms.
Because of the small stars are very common, and most of the stars in the galaxy are locked in a binary system, the chances of finding a small double stars are very high. But researchers warn that do not possess accurate figures. Mason admits that binary systems may be as much as the individual.
By the way, most recently, astronomers have found closest to the solar system, a pair of “to hug” stars . But instead of bursting stars glow a la our “sun” there are only two sad brown dwarfs, which are unlikely to harbor life, lost in space in search of shelter.
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Tags: The binary system of stars , Extraterrestrial Life , Double Stars, Tatooine
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