Technology Scientists Say Black Holes Are Everywhere

18:12  09 august  2017
18:12  09 august  2017 Source:   International Business Times

Scientists Watch A Black Hole Collide With A Neutron Star

  Scientists Watch A Black Hole Collide With A Neutron Star Want to see a black hole and a neutron star crash into one another? So did these scientists.Scientists saw this in computer simulations as they were trying to learn what happens when these two dense objects merge. They hope being able to predict the result of these collisions will help them find the real thing as they scan the skies with their instruments, as well as better understand the role neutron stars play in the universe.

It appears that that relation does not work very well with extremely massive black holes ; they are a larger fraction of the host galaxy’s mass. One idea to explain the black hole ’s monster size, say the scientists

Which is fine; I don’t expect you to have spent a decade (or more) of your life studying this as an undergraduate, graduate student and scientist . Obviously, primordial black holes are expected to be much smaller. But it’s not incredibly difficult to imagine a black hole , say , flung off by an orbital

A ball of light known as a corona attempts to escape a black hole’s pull.  © Provided by IBT US A ball of light known as a corona attempts to escape a black hole’s pull.  The Milky Way galaxy is a minefield of black holes, with perhaps 100 million of the dangerous voids hiding among the stars, according to a new paper.

Researchers have estimated the number of black holes created by elderly stars for a study in the journal Monthly Notices of the Royal Astronomical Society, and the team says there are way more in our neighborhood of the universe than they were expecting going into the analysis.

Massive stars that get really old might die in a dramatic fashion, collapsing in on themselves. When that happens, all of the mass that was once taking up a lot of real estate in outer space is suddenly pinched into a relatively tiny area, making for an object so dense that not even light, traveling faster than anything else in the universe, can escape its grasp — hence why black holes are dark.

'Jellyfish' Galaxies Reveal Feeding Habits of Monster Black Holes

  'Jellyfish' Galaxies Reveal Feeding Habits of Monster Black Holes Glowing "jellyfish" galaxies have revealed a new way to power some of the most powerful objects in the universe.  While most galaxies, including the Milky Way, hide massive black holes at their centers, only a few produce enough electromagnetic radiation as they eat to create active galactic nuclei (AGN). AGN shine brilliantly in the universe, and why they form around some black holes and not others has been an ongoing mystery. But jellyfish galaxies may help crack the case.

Bullock said . Read: Scientists Watch a Black Hole Collide With a Neutron Star. When it comes to black hole population and size, it depends on how big the home galaxy is ; bigger galaxies make for smaller stellar-remnant black holes .

Fortunately for black holes everywhere , Mathur and his team have also been toying with the fuzzball theory, and their results (found on arxiv) disagree with the firewall theory. Instead of a fiery ball of destruction, they say that black holes are more like galactic copy machines.

The researchers wanted an idea of the number of these stellar-remnant black holes. To get their estimates, they used existing information about the distribution of stars: where they exist and how big they are. The estimates also told them how big they could expect black holes would be after the massive stars collapsed.

“We have a pretty good understanding of the overall population of stars in the universe and their mass distribution as they’re born, so we can tell how many black holes should have formed with 100 solar masses versus 10 solar masses,” study co-author James Bullock said in a statement from the University of California, Irvine. “We were able to work out how many big black holes should exist, and it ended up being in the millions — many more than I anticipated.”

Einstein's Relativity Tested by Giant Star and Monster Black Hole

  Einstein's Relativity Tested by Giant Star and Monster Black Hole A giant star near the center of our galaxy hints, once again, that Albert Einstein was correct about gravity.  A group of astronomers in Germany and the Czech Republic observed three stars in a cluster near the supermassive black hole at the center of the Milky Way galaxy. Using data from the Very Large Telescope in Chile, among others, the researchers tracked how the stars moved as they went around the monster black hole.

Researchers at Switzerland's ETH Zurich and the University of Miami say black holes are among us — at least, massive eddies in the southern Atlantic Ocean bear their telltale signatures. What a black hole is to light, an ocean eddy, scientists suggest, is to water.

Scientists have identified three kinds of black holes – small, medium, and large. (2)They are receding away or veiled after being apparent and science says they were stars that receded or veiled as light can't escape their gravitation.

There could be as many as 100 million in the Milky Way alone.

“Based on what we know about star formation in galaxies of different types, we can infer when and how many black holes formed in each galaxy,” researcher Oliver Elbert said in the statement. “Big galaxies are home to older stars, and they host older black holes too.”

According to the university, the research came about after scientists detected gravitational waves for the first time.

Gravitational waves are disturbances in space-time that come from enormous events, like two black holes crashing into and merging with one another — the circumstances under which scientists detected them almost two years ago. Those two colliding black holes were each about 30 times bigger than the sun, larger than some expected to see in a stellar-remnant black hole.

“That was simply astounding and had us asking, ‘How common are black holes of this size, and how often do they merge?’” Bullock said.

When it comes to black hole population and size, it depends on how big the home galaxy is; bigger galaxies make for smaller stellar-remnant black holes. The university explained that in larger galaxies, stars tend to contain a lot of metal, and they “shed a lot of that mass over their lives” so there isn’t much left over by the time they collapse. In smaller galaxies there aren’t as many heavy elements in the stars, so there is more mass remaining at the end of the big stars’ lives — paving the way for a big black hole.

Optical laser uses shockwaves to peer inside distant planets .
It has as much kick as 17 Teslas discharging their batteries in a second.Using this technology researchers have already investigated the effects of meteor impacts on minerals within the Earth's crust, but the increased range and power of the laser means scientists can now begin exploring higher pressure material much further away. Shaughnessy Brennan Brown, a doctoral student in mechanical engineering, said the upgrade enables researchers "to generate exciting, previously-unexplored regimes of exotic matter -- such as those found on Mars, our next planetary stepping stone -- with crucial reliability and repeatability".

—   Share news in the SOC. Networks

Topical videos:

This is interesting!