The theory of dark matter could take another turn after scientists identified some galaxies which don’t have the mysterious element. As we might know, the importance of the dark matter is significant for galaxies to rotate and stick together.
There are galaxies without dark matter
The recent study, however, shows how scientists have now found 19 dwarf galaxies (smaller than Milky Way), which are missing the dark matter. To confirm such a thing, though, a team of researchers from the Chinese Academy in Beijing, utilized current data from the Arecibo radio telescope.
The team started looking out for how fast hydrogen was running around these bunches of stars, meaning that the increased speed is, the more mass a galaxy possesses. Further, they approximated the mass of the hydrogen and added it to the mass of all the stars in the small galaxies to decide how much dark matter was, in fact, there, or not thereof. In ‘standard’ situations, only 2 % of a galaxy is built up of non-dark substance.
The ESA will launch the Euclid Satellite to search for dark matter
The team discovered many strange things, such as one of the galaxies, which was built up to 27 % of non-dark matter. Kyle Oman, an astrophysicist at Durham University in England, discussed the importance of such results. He stated: “This new class of galaxy is straining our ability to explain all galaxies in one cohesive framework.”
Researchers released one theory about what happened to the dark matter disappearance, explaining that it was shredded away by bigger galaxies. It is worth saying again that researchers don’t know for sure what dark matter is, even if there are many theories. But despite this, ESA is ready to launch its £10 million Euclid Satellite to search for signals of the intangible and enigmatic dark matter.