Black hole image of Sagittarius A* unveiled by scientists from the center of the Milky Way Galaxy

Scientists on Thursday got a first look at the monster lurking at the center of our Milky Way galaxy, unveiling an image of a supermassive black hole that traps any matter within its immense gravitational pull.

Black hole – called Sagittarius Aor SgrA – This is only the second picture I have taken so far. He did this feat event horizon telescope (EHT) International Cooperation that in 2019 Unveiled First photo of a black hole – it resides in the heart of a different galaxy.

Sagittarius A* has 4 million times the mass of our Sun and is located at a distance of about 26,000 light-years—the distance of light in a year, 5.9 trillion miles (9.5 trillion km)—from Earth.

Black holes are exceptionally dense objects with gravity so strong that not even light can escape, making them quite challenging to observe. The event horizon of a black hole is the point of no return beyond which anything – stars, planets, gas, dust, and electromagnetic radiation of all kinds – is pulled into oblivion.

Project scientists have discovered a ring of light – super-heated disrupted matter and radiation circling at extreme speeds at the edge of the event horizon – around a region of darkness representing a real black hole. This is known as the shadow or silhouette of the black hole.

The Milky Way is a spiral galaxy containing at least 100 billion stars. Viewed from above or below, it resembles a spinning pinwheel, with our Sun located on a spiral arm and Sagittarius A* at the centre.

A glowing ring of red, yellow and white is seen around a dark center in an image released in 2019 of the supermassive black hole in a galaxy called Messier 87, or M87. The M87 black hole is much more distant and massive than Sagittarius A*, located about 54 million light-years from Earth, with a mass 6.5 billion times that of our Sun.

The researchers said that Sagittarius A*, despite being much closer to our solar system than M87, was harder to image.

Sagittarius A* has a diameter of about 17 times that of the Sun, meaning it will sit within the innermost planet of Mercury’s solar orbit. In contrast, the diameter of M87 would completely encircle our solar system.

“Sagittarius A* is a thousand times less massive than the black hole on M87, but since it is in our own galaxy, it is much closer and should appear slightly larger on the sky,” said radio astronomer Lindy Blackburn, a EHT data Scientists from the Harvard-Smithsonian Center for Astrophysics.

“Although the small physical size of Sgr A. This also means that Sgr A . for everything changes about a thousand times faster To see Sgr A* compared to M87, we must also look through our galaxy’s dirty disk, which blurs and distorts the image,” Blackburn said.

The Event Horizon Telescope is a global network of observatories working collectively to observe radio sources associated with black holes. The project was launched in 2012 to attempt to directly observe the immediate environment of a black hole.

There are different categories of black holes. The smallest are the so-called stellar-mass black holes formed by the collapse of massive individual stars at the end of their life cycles. There are also intermediate-mass black holes, which are a step up in mass. And finally there are the supermassive black holes that reside at the center of most galaxies. They are thought to arise relatively quickly after their own galaxies have formed, devouring enormous amounts of material to attain enormous sizes.

Thursday’s announcement was made at simultaneous news conferences in the United States, Germany, China, Mexico, Chile, Japan and Taiwan.

Source link

Sharing Is Caring:

Leave a Comment