Artist depiction of a Dyson sphere. Credit: Kevin McGill
Researchers think that they can notice Dyson's sphere that is around the white dwarf. The hypothesis is that Dyson's sphere is the megastructure that alien civilization is made. So if there is some kind of Dyson's sphere around the white dwarf that thing will prove the existence of an alien civilization. The problem with the creation of Dyson's sphere is the weight of that enormous structure. The rotation of the structure denies its collapse to the star that is in the middle of it.
The alien civilization can use the white dwarf as an energy source simply driving ions and other material to the surface of the white dwarf. And those impacts will create energy that this megastructure collects. But the thing is that white dwarfs are a little bit too anemic for searching that kind of civilization.
The standard model of hypothetical Dyson's sphere is the extremely large structure that some aliens create for solving the population problems. That kind of civilization can stay home after their sun exploded like a nova. And that giant structure offers a home and energy collector for that civilization.
Maybe highly advanced civilizations can use Dyson's spheres for creating new artificial stars.
But then we might think that it's possible, that an alien race would build Dyson's sphere around the red dwarf or even larger stars. In that case, the sphere itself can be unmanned and it can send energy to aliens by using laser rays.
But the highly advanced civilization can use Dyson's sphere for some other purposes. They could create stars by using that sphere. In that case, the sphere will pull ionized hydrogen inside it. Then it can aim laser rays and press that ion cloud together by using magnets. That allows the creation of small-size stars.
Neutron stars would be more promising energy sources than white dwarfs.
There is a possibility that neutron stars can use it to create energy for themselves. The neutron stars are transmitting energy in the form of radio- and electron rays. Using that energy requires that the radio receiver or iron wire will pull in that energy ray. That wire just conducts the electrons from that ray to the energy transmitter.
When we are thinking that structures the mission is just to collect energy we can just cover magnetic objects like neutron stars or planets by using a network of iron wires. That kind of lightweight version of Dyson's sphere can collect energy and send it to the users. So it can be unmanned. And equipped with power transmitting systems. This kind of system can send information and energy even to other solar systems.
Dyson's sphere is only one version of megastructures that can someday serve the human race. The thing is that we cannot predict what kind of future we have. But the possibility to make Dyson's sphere-type megastructures is fascinating.
Today, Dyson's sphere is also the common name for rotating ball-shaped space stations. The size of those more or less possible theoretical stations changes from a couple of tens of meters to the systems that are larger than the entire solar system.
Sources and images
https://phys.org/news/2022-05-dyson-spheres-white-dwarfs.html
https://en.wikipedia.org/wiki/Dyson_sphere
https://onlyimaginationlimitsinnovation.blogspot.com/
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