The smallest known star is smaller than Saturn is taken energy from an outer source for creating the fusion reaction.
1) The radiation emission, what comes from the central star allows that the nuclear fusion in that star would be forming
The smallest known star EBLM J0555-57 AB (1) is smaller than Saturn, and the thing, what makes this star very interesting is the question, "how the nuclear reactions of this star have begun because the mass of this star must be so small, that the begin of the self-sustain nuclear reactions are possible. The thing in this star is its part of the triple star system, which means that the external energy could maintain the nuclear reactions inside this interesting star.
In this case, the external energy allows the nuclear reactions in that small star are possible. The triple star-system has two components what are spectral type F8(2) stars, which means they are almost like our sun. And the smallest component would get enough energy, that it can start the own nuclear reaction, so the radiation of the central star would make this miracle possible. That means that the energy, that comes from the external source causes that nuclear fusion has been started.
The thing is that the F-spectral class stars are almost similar to the Sun, what is the G-spectral class star doesn't mean that the F-spectral class stars have intelligent lifeforms. The life of those stars is shorter than the sun, and that means that there could be no time to create the civilizations, but that thing is the only speculation. Some people are saying, that the researchers are a little bit too arduous about the star, what the habitable planet should orbit.
2) This star has given ideas to finding stars, where the external energy causes the forming of the fusion reaction.
The remarkable thing is that the radiation, what comes from the F8 spectral class star is causing the nuclear reaction on the core of EBLLM J0555-57 AB, and that thing has also shown that the external energy source allows that even the small particles can start to create the fusion energy. The fusion is not self-sustain in those cases, and it's depending on the outer energy sources.
One of the things, that this EBLLM J0555-57 AB has brought in the mind of some theorists is that could this kind of star be created artificially? Maybe we don't yet have that kind of skills or we would not need them, but in the future, the situation could be different. That means that the high-powerful electromagnetic radiation would be targeted to some gas planet, and that could ignite the nuclear reaction inside that planet.
If we are thinking the EBLLM J0555-57 AB very close, we might think that some of the smallest possible stars can be formed, when the energy jet of the black hole or neutron star would hit the star or protostar, what makes it explode. This kind of reaction would also give ideas when researchers are creating the models of the fusion reactions.
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