Scientists found that black holes can reach the size of ‘large size’

This computer-simulated image shows a supermassive black hole at the core of a galaxy. The black area at the center represents the event horizon of the black hole, where no light can escape the gravitational hold of the object at large. The powerful gravity of a black hole distorts the space around it like a funhouse mirror. Light is stretched from background stars and stars are skimmed by black holes. Credits: NASA, ESA, and D. Coe, J. Anderson, and R. Van der Merle (STScI)

A recent study suggests that the possible existence of ‘surprisingly large black holes’ or SLABS, even larger than the supermassive black holes already seen in the center of galaxies.

Research led by Queen Mary Emeritus Professor Bernard Carr in the School of Physics and Astronomy, F. Kunell (Munich) and L. Vicinelli (Frasati) investigated how these SLABs could form and potential limitations to their size.

While there is evidence of the existence of a supermassive black hole (SMBH) in galactic nuclei – the last million times a million times the mass from the Sun – our current view suggests an upper limit to our size. Black holes form and grow.

The existence of SLABS is even greater that can provide researchers with a powerful tool for cosmological tests and improve our understanding of the early universe.

Challenge existing ideas

It has been widely thought that SUBs form within a host galaxy and grow to their larger size by swallowing stars and gas around them or merging with other black holes. In this case, there is an upper limit on their mass, slightly above ten billion solar masses.

In this study, the researchers proposed another possibility as to how the SUB could form, which could break out of this range. He suggests that such SLABs may precede ‘primitive’ and galaxies formed in the early universe.

As ‘primordial’ black holes do not form from a crumbling star, they can have many types of mass, including much smaller and larger scales.

Professor Bernard Carr said: “We already know that black holes exist in a vast range of the general public, with an SMBH of four million solar masses at the center of our own galaxy. While the existence of SLABs is present There is no evidence. It is conceivable that they can exist and that they can also live outside of galaxies in space space, with interesting space consequences. However, surprisingly, the idea of ​​SLAB has been largely neglected until now. has gone. “

“We have presented options for how these SLABs can become, and hope that our work will begin to inspire discussions among the community.”

Understanding dark matter

Dark matter is thought to make up about 80 percent of the normal mass of the universe. Until we can see it, researchers think dark matter exists because of its gravitational effect on visible matter such as stars and galaxies. However, we still do not know what Dark Matter is.

Primordial black holes are one of the possible candidates. The idea of ​​their existence can be traced back to the 1970s when Professor Carr and Professor Stephen Hawking suggested that its density could fluctuate in the first moments of the universe resulting in some regions collapsing into black holes.

“The SARBs could not provide themselves with dark matter,” Professor Carr said, “but if they all exist, it would have significant implications for the early Universe and it would be plausible that lighter primordial black holes could do so.”

The discovery of dark matter from primordial black holes and multiverse

more information:
Bernard Carr et al. Obstacles in massive black holes, Monthly notice of the Royal Astronomical Society (2020). DOI: 10.1093 / mantra / staa3651

Provided by Queen Mary, University of London

Quotes: Scientists found that black holes can reach ‘large sizes’ (2021, 21 January). May 21 January 2021 can be retrieved from

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