Astrophysicists have discovered two supermassive black holes in the quasar closest to Earth. This is the first evidence of the existence of double black holes and that supermassive black holes build their masses through violent mergers
Researchers from the University of Oklahoma and China examined observations from the Hubble Space Telescope and discovered two massive black holes in the quasar Mercarian 231. Photo: Space Telescope Science Facility, Baltimore, Maryland.
An astrophysicist at the University of Maryland and his colleague from China have discovered two supermassive black holes in Markarian 231, the closest quasar to Earth, using Hubble Space Telescope photographs. The discovery of the two giant black holes, one of them larger and the other smaller, are evidence of the existence of double black holes and that the supergiant black holes, the ones at the center of all known galaxies in the universe, build their mass through violent mergers.
A quasar is an active galaxy with a luminous center, which lived for a relatively short period of time relative to the age of the universe. The galaxy Mrk 231 is about 600 million light years from Earth.
Xinyu Dai from the Department of Physics and Astronomy at the University of Oklahoma, in collaboration with Yongjun Lu from the Chinese National Observatory of the Chinese Academy of Sciences, examined the ultraviolet radiation at the center of Mrk 231 from Hubble Space Telescope observations and then fitted them to a model developed by Lu for the spectrum of the galaxy. As a result, they were able to predict the existence of another black hole in Mrk 231.
"We are particularly excited about this finding because it not only shows the presence of a double black hole in Mrk 231 but also paves the way for an orderly search for binary black holes thanks to the nature of their emission in the ultraviolet light range" says Lu.
"The structure of the universe, such as these giant galaxies and galaxy clusters, develops through the merger of small galaxies into large ones, and double black holes are a natural product of the galaxy merger process," says Dai.
Over time the two black holes discovered in Mrk 231 will collide and merge to form a quasar containing a supermassive black hole.
The study was published on August 14, 2015 in the Astrophysical Journal.
to the notice of the researchers
More of the topic in Hayadan:
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Quizar reminds me most of all of the five blind Indians who try to touch an elephant, each reaching different conclusions depending on the part they touch, and to borrow Quizar: according to Quizar's orientation in relation to us.
I would like to recommend the following lecture on quizzes, and the entire series of lectures by Prof. Caroline Crawford of Grisham College:
https://www.youtube.com/watch?v=bagpxIzXow0&index=15&list=PL4F30369DD56438FE
The issue of terminology regarding galaxies with an active center suffers from many problems, this is because for years it was not clear what exactly was being seen. The correct and accepted general name is active galactic nuclei (AGN), while the quasars, radio galaxies, blazars, Seyfert galaxies, etc. are described as special cases of AGN.
Broadly speaking, these are galaxies with a supermassive black hole at their center absorbing large amounts of matter. The accretion disk surrounding the black hole ignites and emits enormous amounts of light. The problem is that what you see is not always the adsorption disc and other elements are always added to it.
For example: clouds of dust and gas that are in the vicinity of the center of the galaxy absorb the light, heat up and emit light at other frequencies - the meaning is that the light we perceive depends on the question of whether such gas clouds stood in the way of the light to us.
In addition, some black holes emit a jet perpendicular to the disk. This jet accompanied by magnetic fields and charged particles emits electromagnetic radiation in a very wide range of frequencies that depends on many details. Of course, the light of the jet that reaches us also depends very much on the geometry.
Bottom line:
The source of energy in active galactic nuclei is the adsorption of matter to the black hole, but since large parts of the center of the galaxy are involved in the final emission of light, the picture becomes complicated and a forest of phenomena is obtained that are highly dependent on the details of the specific system.
Since what is said here was not known at the beginning of the observations, the objects were given many names.
may be…
Do you notice that everyone here looks down on you? Don't you ask yourself why? Maybe... maybe it's because you lie constantly?
Wondering,
What emits the strong light is not the black hole, it is the gas and particles that swirl around the black hole at enormous speeds (very close to the speed of light) and the enormous heat created is expressed in a very strong light.
Wiki also does not claim that quasars are galaxies.. but in the center of galaxies.. or am I misunderstanding something?
"An active galactic nucleus (AGN) is a compact region at the center of a galaxy"
rival
Wisdom flows from your ears...
Nissim, to remind you, you do not deserve a response...
It's possible... at some point in their lives they turn into a liquid, right?
A clarifying question for those who know: the connection between black holes and quasars sounds strange. On the one hand, they claim that a black hole absorbs everything and nothing comes out of it (sounds delusional and an endless process), and on the other hand, a quasar is a body with a black hole at its center? A quasar that releases enormous energies?
Miracles
Remember,
All your reactions to me in the past were negative, I will not tolerate such treatment...
This is due to your strictness.
may be…
again?
I think there is confusion about the whole issue.
What is read here:
"That the supergiant black holes"
They are not black holes, but something else unknown...
Pretty
M_H, a quick google search.
https://en.wikipedia.org/wiki/Quasar
a quote:
"Quasars (/ˈkweɪzɑr/) or quasi-stellar radio sources are the most energetic and distant members of a class of objects called active galactic nuclei (AGN)."
no one knows huh?
As far as I know, the University of Oklahoma is proud this time..
Which of the genius responders of the site, who are much more confident than me?
A. Avi Leib is a reliable source
b Until recently there were hypotheses about the essence of the quasar -, today we know a little more.
"A quasar is an active galaxy with a luminous center"?? are you sure about that?? As far as I remember, a quasar is not a galaxy 🙁
My dear father, the subtitle screams: two holes and not two holes. Best regards.
For my father, the Soyuz spacecraft was moved to another place on the station, you will be updated on the space station