Feb 16, 2023 16:00:00

The first clue indicating the possibility that the source of dark energy is a ``black hole'' is found

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Dark energy ,' which is said to exist in outer space, is speculated to exist from observations of stars and galaxies, but what it is and where it comes from is unknown. A new study has found that 'black holes' may explain the mysterious energy that makes up most of the universe.

A Preferential Growth Channel for Supermassive Black Holes in Elliptical Galaxies at z ≲ 2 - IOPscience
https://doi.org/10.3847/1538-4357/acac2e

Observational Evidence for Cosmological Coupling of Black Holes and its Implications for an Astrophysical Source of Dark Energy - IOPscience
https://doi.org/10.3847/2041-8213/acb704

Scientists find first observational evidence linking black holes to dark energy | University of Michigan News
https://news.umich.edu/scientists-find-first-observational-evidence-linking-black-holes-to-dark-energy/

Black holes may be the source of mysterious dark energy that makes up most of the universe
https://theconversation.com/black-holes-may-be-the-source-of-mysterious-dark-energy-that-makes-up-most-of-the-universe-199831

The substances (matter) that make up the familiar world of humans are only 5% of everything that exists in the universe. The remaining 27% is dark matter, which is like a shadow of ordinary matter that does not emit, reflect, or absorb light, and about 68%, which makes up most of the universe, is thought to be dark energy. It is

Research led by Gregory Tarle, a physics professor at the University of Michigan, has linked the growth of black holes to the expansion of the universe. ” was suggested.

According to the overseas media The Conversation, this idea is not particularly new and has been actively discussed since the 1960s. However, in this study, the vacuum energy was assumed to increase over time as the universe expands, and the amount of dark energy attributed to this was calculated, making it the first link between black holes and dark energy. It is noteworthy that the results of the investigation have been reported.

Tarle et al. focused on the supermassive black hole at the center of the galaxy and compared the past and present observation results. Previous research has revealed that the mass of black holes has been changing over the past 9 billion years, but Tarle et al. It turns out that the mass was increased to 7 to 20 times compared to .

However, the mass increase cannot be explained by normal processes because the black hole used for comparison had already absorbed the surrounding matter. Tarle and his colleagues propose that these black holes contain vacuum energy and are 'coupled' to the expansion of the universe, thus gaining mass as the universe expands. bottom.

``If the coupling is confirmed, it means that the black hole will never be completely separated from our universe and will continue to have a major impact on the evolution of the universe into the distant future,'' said Tarle. .