Messier is the growing shadow of the supermassive black hole of 87. In 2019, the Event Horizon Telescope (EHT) gave the first resolved images of M87 *, a supermassive black hole at the center of the massive elliptical galaxy Messier 87 (M87).
Those images were produced using EHT comments made in April 2017. Additional observations were required to examine the persistence of the main image feature and quantify the image variability.
To meet this requirement, astronomers analyzed M87 * data in 2009, 2011, 2012, and 2013 with a series of proto-EHT telescopes. The analysis reveals the behavior of the black hole image in this period, indicating the persistence of the crescent moon.
The characteristic of the shadow, but also the variation in its orientation, seems feverish. The EHT collaboration reveals the first direct visible evidence of a supermassive black hole at the center of the elliptical galaxy Messier 87 and its shadow.
Here the shadow of a black hole appears and we can get closer to the image of a black hole, a completely dark object from which light cannot escape. The range of the black hole, the event horizon, from which the EHT takes its name, is about 2.5 times smaller than the shadow it casts and measures less than 40 billion kilometers (25 billion miles). Image Credit: tips16.com
“EHT can detect changes in the morphology of M87 *, such as on time scales for short days, but its general geometry must be constant over long time intervals,” said Dr. Maciec Wilgus, an astronomer at the Harvard Center for Astrophysics. and Smithsonian.
“In 2019, we saw the shadow of a black hole for the first time, but we only saw images seen during a one-week window, much less to see many changes. Combining the proto-EHT data from 2009-2013 with the data from 2019 revealed that M87 * follows theoretical predictions.
The shape of the black hole’s shadow remains constant and its diameter is consistent with Einstein’s theory of general relativity for black holes with 6.5 billion solar masses. “In this study, we show that normal morphology, or the presence of an asymmetric ring, likely persists for several years,” said Dr. Kazu Akiyama, an astronomer at the MIT Hastie Observatory.
“This is an important confirmation of theoretical expectations because consistency across many observable epochs gives us more confidence than ever about the origin of M87 * and Shadow.”
Snapshot of the presence of a supermassive black hole M87 *, obtained through imaging and geometric modeling, and the telescope’s EHT array in 2009-2017. The diameter of all rings is the same, but the location of the bright side varies.
While Vardhaman Vyas held steady, the new data also shows that he was hiding a surprise: the ring wobbles. Gas falling into a black hole heats up to billions of degrees, ionizes, and turns cloudy in the presence of magnetic fields. This turbulence causes the black hole to vary over time.
“Because the flow of matter falling onto the black hole is turbulent, we can see that the ring wobbles over time,” Dr. Wilgus said. The dynamics of this wobble will allow us to interrupt the flow of accretion.
“The accretion flow contains the material that brings us so close to black gravity that we can observe the effects of strong gravity and, in some circumstances, allow us to test the predictions of general relativity, as we have done in this study,” said Dr. Richard Anantua.
An astronomer at the Harvard and Smithsonian Center for Astrophysics. Many years of ETH data allow scientists to experience the amount of variability in the presence of a ring. In fact, we see a lot of variation there, and not all theoretical accretion flow models allow for that much variability, Dr. Wilgus said.
“As we get more measurements in the future, we can confidently fit the model and discard some of them.” In the current study, the team used data from Proto-EHT, an array consisting of binoculars at three geographic locations.
A combined array for millimeter wave astronomy research at Cedar Flat, California; Submillimeter telescope on Mt. Graham in Arizona; And the submillimeter array, the James Clerk Maxwell telescope, and the Caltech submillimeter observatory at Mounakia in Hawaii.
EHT’s founding director, Drs. “These early EHT experiments provide us with a wealth of long-term observations, which may not even match the current EHT, its remarkable imaging capabilities,” said Sheep Doleman.
“When we first measured the size of Messier 87 in 2009, we had no idea that it would give us our first look at the dynamics of black holes.” If you want to see the evolution of a black hole over a decade, there is no option of having a decade of data.
Dr. “Continuous analysis of past observations, coupled with new observations, will lead to a better understanding of the dynamic properties and black holes of M87 *,” said Wilgus. “Monitoring M87” with an extended EHT array will provide new images and a much richer data set to study turbulent dynamics, “said Dr. Geoffrey Bower.
An astronomer at the Academia Sinica Institute of Astronomy and Astrophysics. “We are already working on analyzing data from the 2018 observations, which have been obtained with an additional telescope based in Greenland.”
“In 2021 we are planning observations with two more sites, which provide exceptional image quality. This is a very exciting time to study black holes! ” The team’s results were published in the Astrophysical Journal.