Yellow dwarfs like the Sun They do not represent most of the objects found in the Milky Way. is considered to be They make up about 10% of the content of our entire galaxy. of course Often you can see a red dwarf in its spiral armsIt accounts for 75% of all stars in the Milky Way.
So it holds mathematically Life is more likely to exist near a red dwarf. Mimo that We live in the residence zone of a yellow dwarf (the Sun) called the red sky paradox. New article The Astrophysical Journal Letters It seems to explain what is behind it.
There are many reasons that defend life’s association with red dwarfs. First of all, they Stars are less mobile than the Sun. Nuclear fusion inside them is very slow, making it These stars can live for billions of years. Theoretically This gives more time for life to unfold than a yellow dwarf.
Not only that Finding exoplanets in the habitable zone of a red dwarf is very easy. This is because the host star is cooler than the yellow dwarf, which causes this The residential area is very close. It makes Habitable exoplanets travel more frequently against red dwarfs And more discoverable.
Astronomers Anna Childs, Rebecca Martin, Mario Livio z University of Nevada w Las Vegas It was decided to check whether red dwarf systems had enough elements to start life on Earth.
Knowing that It started with comets and asteroidsGiven organic matter, they began to analyze the possibilities of survival Asteroid rings around red dwarfs. And they found it Their absence can cause great difficulty in life development On rocky planets.
Asteroid rings usually form in systems where gas giants exist Located outside the snow line. That is the place The water contained in the protoplanetary disk turns into ice. A gas giant near this zone could alter the orbits of asteroids or comets and direct them into the habitable zone..
Scientists examined known planetary systems around red dwarfs, including gas giant and rocky planets. Yet 48 rocky planets confirmed near red dwarfs27 of them have multiple planets. For 16 red dwarfs, the masses of the exoplanets that make up the planetary system are known.
The search was conducted based on the definition A gas giant that includes planets 0.3 to 60 times the mass of JupiterSimilarly the distance to the initial snow line is calculated for discrete systems.
It changed The existence of gas giants and rocky masses in the region inhabited by the same red dwarf is impossible. None of the analyzed systems containing a rocky planet in the habitable zone had a gas giant. In the systems where gaseous planets were found, there were no rocky planets. This indicates The characteristics of red dwarf planetary systems can be quite different from those of the Solar System.
This causes our present Red is good for understanding life Dwarves. If The existence of asteroid belts is essential for the existence of lifeNot likely to be expected around these types of stars.
This also raises many questions that need to be answered. Maybe asteroid impacts weren’t that important to the development of life? Perhaps life near red dwarfs is completely different from life on Earth? Are we overestimating the importance of a habitable zone outside of which life can exist?
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