The findings of a study of British astrophysicistsThe University of Warwick, published in the Monthly Notices of the Royal Astronomical Society, talks about which planets have the most chances to survive the death of their native stars. Scientists were interested in the effect of tidal forces on the planets after the transformation of their stars into white dwarfs. They modeled the behavior of various types of planets after the death of their luminaries and found out that small and dense worlds have more chances to stay alive. But not everything is so simple.
Computer simulations have shown that the planetsdestroyed, breaking up into small fragments, under the action of tidal forces, if they fall during the death of the main star of the system in the so-called "radius of destruction". At the same time, research has shown that it will be much easier for compact planets to avoid the effects of the gravitational forces of their luminaries, rather than larger worlds.
Scientists were able to identify the most significant factorswho can talk about the probability of the death of the planet. For example, scientists have reported that the survival rate of the planet in this case will be influenced not only by its size and mass, but also viscosity. Planets with a low drag coefficient are more easily attracted to their star, even if they are at a safe distance, 5 times the "radius of destruction".
For the study of astrophysics have created a simple model of the planet, consisting mainly of solid rock.
The study authors note that, our Earthis a much more complex world, which brings together several different layers of rocks, so making evaluation findings in this case is more difficult. At the same time, we can already assume that such planets as Mercury, Venus and Pluto can survive the death of our Sun, which will undoubtedly happen in a few billion years.
“Our research concerns only homogeneousstony planets. Such multi-layered planets like our Earth are much more difficult to calculate, but we will try to figure out the probability of its survival, ”says Astrophysics doctor Dimitri Veras from the University of Warwick.
Researchers note that their work is capableto help restore the events of deaths of stars in other systems and to understand which planets could exist there before the transformation of its star into a white dwarf.
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