Home » The latest astronomical research: the globular star cluster Palomar 5 will spray all stars in one billion years, and there will be more than a dozen black holes left

The latest astronomical research: the globular star cluster Palomar 5 will spray all stars in one billion years, and there will be more than a dozen black holes left

by admin

Original title: The latest astronomical research: the globular star cluster Palomar 5 will spray all stars in 1 billion years, and there will be more than a dozen black holes left

China News Service, Beijing, July 6 (Reporter Sun Zifa) Springer Nature’s professional academic journal “Nature-Astronomy” recently published a research paper called “Black Hole Discharge”, which pointed out that the globular star cluster Palomar 5 (Palomar 5) will spray all stars in one billion years, and only a dozen black holes will remain.

This important astronomical research result is of great significance for people to understand the evolution of Palomar 5 and the fate of other star clusters in the Milky Way.

According to the paper, Palomar 5 has two typical features: it is one of the sparsest star clusters in the halo (old stars distributed in the periphery of the Milky Way), and it also has two long “tails” that are caused by It is composed of ejected stars. Since these long “tails” span more than 20 degrees in the sky, Palomar 5 is a rare star cluster that can help people understand the formation of “tails”.

The corresponding author of the paper, Mark Gieles of the University of Barcelona, ​​Spain, and his colleagues studied the evolution of Paloma 5 through a star-by-star simulation. The simulation found that the structure of Palomar 5 and the typical features of its prominent long “tail” may come from a group of stellar black holes, which account for about 20% of Palomar 5’s mass. In the scenario they proposed, the mass of this part of the black hole of Palomar 5 exceeded the critical value, causing the loss of stars faster than the black hole. As a result, Palomar 5 inflated and formed a long “tail”. One billion years later, the gravitational action of these black holes will now eject all the stars out of Paloma 5, leaving only black holes in the end.

See also  Vali Vijelie paid a ridiculous amount to have a star on the Hollywood Walk of Fame

The author of the paper believes that with the passage of time, the structure of dense star clusters will become more and more compact, and the proportion of black holes will decrease, and the “tail” can be seen to disappear. Therefore, extended star clusters such as Palomar 5 containing a large number of black holes may have been detected recently. , Precursor celestial body of thin star stream without satellite cluster. (Finish)Return to Sohu to see more

Editor:

Disclaimer: The opinions of this article only represent the author himself. Sohu is an information publishing platform. Sohu only provides information storage space services.

.

You may also like

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Privacy & Cookies Policy