Mini Hole
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Mini Hole
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by Gemma Lavender , 11 October 2018
More stories to check out before you go
Are these dense objects scattered throughout the universe?
Black holes with masses less than their heavyweight relatives – the standard and supermassive black holes – and weighing in at less than three solar masses are dubbed mini black holes, formed in the pressure of interstellar clouds. Because they are so small, they also have a little bit of difficulty when it comes to forming on their own. Low mass also means low gravity and this directly implies that these pint-sized objects cannot completely collapse in on themselves. In comparison, black holes of more than three times the Sun’s mass are made when a star reaches the end of its life and gets crushed under its own gravity. Other black holes of greater masses are hypothesised to have formed through the merging of smaller black holes.
In order to make a mini black hole there needs to be an enormous outside pressure to offer some assistance. The theory goes that during the dense turbulent past from which today’s universe emerged the enormous crushing pressures created many mini black holes. Unusually they are likely to have been incredibly heavy but quite tiny – possibly as small as a proton (the positive subatomic particle that can be found in atoms). According to quantum mechanics, it is thought that they spontaneously throw out energy before evaporating in a final violent explosion after billions of years in existence. They also may not be as black as heavier black holes.
We’ve yet to find some actual observational evidence that they exist but as it stands, there could be mini-black holes scattered throughout the Universe and close to our Solar System!
Keep up to date with the latest news in All About Space – available every month for just £4.99. Alternatively you can subscribe here for a fraction of the price!
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We and our partners store and/or access information on a device, such as cookies and process personal data, such as unique identifiers and standard information sent by a device for personalised ads and content, ad and content measurement, and audience insights, as well as to develop and improve products.
With your permission we and our partners may use precise geolocation data and identification through device scanning. You may click to consent to our and our partners’ processing as described above. Alternatively you may access more detailed information and change your preferences before consenting or to refuse consenting.
Please note that some processing of your personal data may not require your consent, but you have a right to object to such processing. Your preferences will apply to this website only. You can change your preferences at any time by returning to this site or visit our privacy policy .
by Gemma Lavender , 11 October 2018
More stories to check out before you go
Are these dense objects scattered throughout the universe?
Black holes with masses less than their heavyweight relatives – the standard and supermassive black holes – and weighing in at less than three solar masses are dubbed mini black holes, formed in the pressure of interstellar clouds. Because they are so small, they also have a little bit of difficulty when it comes to forming on their own. Low mass also means low gravity and this directly implies that these pint-sized objects cannot completely collapse in on themselves. In comparison, black holes of more than three times the Sun’s mass are made when a star reaches the end of its life and gets crushed under its own gravity. Other black holes of greater masses are hypothesised to have formed through the merging of smaller black holes.
In order to make a mini black hole there needs to be an enormous outside pressure to offer some assistance. The theory goes that during the dense turbulent past from which today’s universe emerged the enormous crushing pressures created many mini black holes. Unusually they are likely to have been incredibly heavy but quite tiny – possibly as small as a proton (the positive subatomic particle that can be found in atoms). According to quantum mechanics, it is thought that they spontaneously throw out energy before evaporating in a final violent explosion after billions of years in existence. They also may not be as black as heavier black holes.
We’ve yet to find some actual observational evidence that they exist but as it stands, there could be mini-black holes scattered throughout the Universe and close to our Solar System!
Keep up to date with the latest news in All About Space – available every month for just £4.99. Alternatively you can subscribe here for a fraction of the price!
All About Space is part of Future plc, an international media group and leading digital publisher. Visit our corporate site .
©
Future Publishing Limited
Quay House, The Ambury ,
Bath
BA1 1UA
. All rights reserved. England and Wales company registration number 2008885.
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A newly discovered "mini" supermassive black hole could help reveal some of the secrets behind the biggest black holes in the cosmos.
Researchers using NASA's Chandra X-ray Observatory recently discovered a monstrous black hole that was "buried" in dust and gas in a dwarf galaxy, according to a statement by the Chandra team . The black hole, which has about 200,000 times the mass of our sun, lies in the center of the dwarf galaxy Mrk 462, and, while it is enormous, it is one of the smallest supermassive black holes ever found.
"This black hole in Mrk 462 is among the smallest of the supermassive, or monster, black holes," Jack Parker, a researcher at Dartmouth College in New Hampshire who co-led the study identifying and studying this black hole, said in the statement. "Black holes like this are notoriously hard to find."
Mrk 462's host galaxy "only" has several hundred million stars. While this might seem like a lot, our Milky Way galaxy has a few hundred billion stars, so this number classifies Mrk 462 as a dwarf galaxy, according to the statement.
Until now, the black hole has been obscured from our view, clouded by dust and gas in Mrk 462. In a larger galaxy, scientists might be able to find a black hole by observing stars moving rapidly at a galaxy's center (signs of the gravitational influence of a black hole), but that wouldn't be possible in a galaxy this small. Instead, the team was able to use Chandra to see the glowing X-rays being emitted from gas being sucked into the black hole.
This is actually one of the first times that a black hole obscured by gas and dust in this way has been observed in a dwarf galaxy, according to the statement.
"Because buried black holes are even harder to detect than exposed ones, finding this example might mean there are a lot more dwarf galaxies out there with similar black holes," study co-lead Ryan Hickox, also a researcher at Dartmouth, said in the same statement. "This is important because it could help address a major question in astrophysics: How did black holes get so big so early in the universe?"
The team hopes that this discovery could help to further the conversation around how supermassive black holes reached such incredible sizes so quickly in the early universe, an enduring scientific mystery.
There are a number of competing theories looking to explain how our universe's supermassive black holes "could pack on weight quickly enough to reach the sizes seen in the early universe," as the Chandra statement puts it.
Every galaxy is thought to have stellar-mass black holes, but not many supermassive black holes have been confirmed to exist in dwarf galaxies. So discoveries such as this could help to explain their existence.
"We can't make strong conclusions from one example, but this result should encourage much more extensive searches for buried black holes in dwarf galaxies," Parker said about this discovery. "We're excited about what we might learn."
This work was presented Jan. 10 at the 239th meeting of the American Astronomical Society meeting in Salt Lake City and as part of a virtual news conference.
Email Chelsea Gohd at cgohd@space.com or follow her on Twitter @chelsea_gohd . Follow us on Twitter @Spacedotcom and on Facebook.
Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: community@space.com.
Chelsea “Foxanne” Gohd joined Space.com in 2018 and is now a Senior Writer, writing about everything from climate change to planetary science and human spaceflight in both articles and on-camera in videos. With a degree in Public Health and biological sciences, Chelsea has written and worked for institutions including the American Museum of Natural History, Scientific American, Discover Magazine Blog, Astronomy Magazine and Live Science. When not writing, editing or filming something space-y, Chelsea "Foxanne" Gohd is writing music and performing as Foxanne, even launching a song to space in 2021 with Inspiration4. You can follow her on Twitter @chelsea_gohd and @foxannemusic .
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