January 27, 2022

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A mysterious object that survived a close encounter with a black hole has been revealed

A mysterious cloud that somehow survived a close encounter with a supermassive black hole has now been revealed.

According to a new study of an object called G2, these are actually three small stars covered in a dense cloud of gas and dust from which they were born. This explanation provides a well-organized solution to questions that remained unanswered after the return of Sgr A* from G2 in 2014 – a supermassive black hole at the center of the galaxy.

“We suggest that the dust-covered objects observed are the remnants of a rickety young stellar cluster that began forming in the nuclear disk,” The researchers wrote in their articleAnd

G2 Discovered in 2011 (described in the study) Posted in 2012) at that time rushed to a phenomenon called Perinigricon – the point in its orbit where it is closest to a black hole.

Astronomers fully expected that the close encounter would lead to the disintegration and transformation of G2 by SGR A*, creating some supermassive fireworks from accretion black holes.

The fact that nothing happened was later referred to as “Connie fidgetG2 reached and elongated as it approached the black hole; Then, after Perinigricon, he returned to a more compact size.

Another annoying feature of the G2 is that it is extremely hot and much warmer than a dust cloud. It is possible that Sgr A* or other stars heated the object, but no matter where it was, the temperature remained the same. This indicates that whatever G2 is heated up is coming from within the cloud, not from outside influences.

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The astronomers found that both of these behaviors are more consistent with the behavior of the star. Last year, a team of researchers suggested that the G2 cloud may be hiding a hidden star – the product of two stars colliding that caused a huge cloud of gas and dust to form around them.

But the same study revealed the discovery of four other similar objects in the galactic center, increasing the total number of G objects to six. This is a large number of built-in diodes.

A team of researchers led by astrophysicist Florian Bisker of the University of Cologne in Germany has come up with an alternative explanation after a detailed 14-year review of observations made with the Very Large Telescope. symphony god.

According to their analysis, G2 should hide three stars that are about a million years old. It is too small for the stars. In contrast, the Sun is 4.6 billion years old. G2 stars are so small that they will still be surrounded by material from the cloud in which they formed.

“G2 is already made up of three rising stars, which is exciting,” Biskar saysBecause this discovery makes these three stars the smallest ever observed around SgrA*.

Galactic Center already contains a file A strange number of young stars, known as s-massAccording to the Peisker team’s model, G2 stars may belong to this population.

The stars could have come from the same nursery and formed a cluster that has since disintegrated, with individual stars disintegrating to form new orbits around Sgr A*.

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Although not associated with cluster S, G2 stars were once part of a larger group of stars. Other dusty objects orbiting Sgr A* may be members of this star cluster, which is probably gravitationally limited after moving from a greater distance to a supermassive black hole.

Since the atmosphere around Sgr A* is not considered suitable for star formation, more work will be needed to determine where G and other G objects originated. Astronomers may also be able to use the new findings to understand more black holesAnd

“The new results provide a unique insight into how black holes work.” Biskar saysAnd

“We can use SgrA’s atmosphere* as a blueprint to learn more about the evolution and processes of other galaxies in very different corners of our universe.”

The search was published in Astrophysical JournalAnd