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Vor einem Tag · In astronomy, dark matter is a hypothetical form of matter that appears not to interact with light or the electromagnetic field. Dark matter is implied by gravitational effects which cannot be explained by general relativity unless more matter is present than can be seen.
Vor einem Tag · The top right image shows quasar HS 0810+2554 (see figure 4). If dark matter is WIMPs, then they will form a dense clump at the centre of a galaxy, smoothly dispersing with increasing distance. Axions, however, operate differently. “Because axions are so light, quantum effects become more important,” says Chadha-Day.
Vor 4 Tagen · For these reasons, the discovery of Dark Matter has been identified as among the most important scientific missions of the 21st century. Three avenues are presently pursued with the aim to identify dark matter: indirect, accelerator, and direct searches. Indirect methods deploy space-based and terrestrial instruments to search for ...
Vor 21 Stunden · To be precise, black holes of 10 solar masses may comprise at most 1.2% of dark matter. 100-solar-mass black holes account for 3.0% of dark matter, and 1000 solar mass black holes – 11% of dark ...
Vor einem Tag · “That indicates that massive black holes can compose at most a few percent of dark matter,” says Dr. Mróz. The detailed calculations demonstrate that black holes of 10 solar masses may comprise at most 1.2% of dark matter, 100 solar mass black holes – 3.0% of dark matter, and 1000 solar mass black holes – 11% of dark matter.
Vor 2 Tagen · Various astronomical observations indicate that ordinary matter, which we can see or touch, comprises only 5% of the total mass and energy budget of the Universe. In the Milky Way, for every 1 kg of ordinary matter in stars, there is 15 kg of “dark matter,” which does not emit any light and interacts only by means of its gravitational pull.
Vor 2 Tagen · Since the start of the matter-dominated era, dark matter has gradually been gathering in huge spread-out (diffuse) filaments under the effects of gravity. Ordinary matter eventually gathers together faster than it would otherwise do, because of the presence of these concentrations of dark matter.
