An Unexpected Bolus Of Black Holes, In The Halo Of The Milky Way…

So, it is very nearby — if we are speaking in truly-cosmic distances, that is.

And it is described as a very fluffy region of star population. Do go read it all, here — and watch the video simulation below:

. . .Palomar 5 is a unique star cluster. This is firstly because it is one of the “fluffiest” clusters in the halo of our Galaxy, with the average distance between the stars being a few light-years, comparable to the distance from the Sun to the nearest star. Secondly, it has a specular stellar stream associated with it that spans more than 20 degrees across the sky. In a paper published on July 5, 2021, in Nature Astronomy, an international team of astronomers and astrophysicists led by the University of Barcelona show that both distinguishing features of Palomar 5 are likely the result of an oversized black hole population of more than 100 black holes in the center of the cluster.

Palomar 5 is a globular cluster discovered in 1950 by Walter Baade. It is in the Serpens constellation at a distance of about 65,000 light-years, and it is one of the roughly 150 globular clusters that orbit around the Milky Way. It is older than 10 billion years, like most other globular clusters, meaning that it formed in the earliest phases of galaxy formation. It is about 10 times less massive and 5 times more extended than a typical globular cluster and in the final stages of dissolution. . . .

Onward — grinning. . . put in mind of a time past. . . just eight years ago, and a re-emergence, from black hole, of sorts.


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