It is quite possible that two classes of objects, which are relatively new discoveries and appear to be completely different from each other, are in fact the same thing, but at different times. We are talking about Little Red Dots and galaxies covered in blue dust.
Multicolored black holes
Everyone knows that black holes are called black because they absorb the entire spectrum of radiation and therefore appear more black than blackness itself. A recently published study shows how much more complicated things can be than this simple picture.
In general, supermassive black holes at the centers of galaxies have been known to humans for quite some time. They are particularly well known because accretion disks and relativistic flows make them not only visible, but also significantly more noticeable than the star systems in which they are located.
The emergence of a new generation of telescopes, including James Webb, has enabled scientists to discover new classes of objects that are most likely supermassive black holes. These are Little Red Dots (LRDs) that appear in images of the Universe 600-1600 million years after the Big Bang.
On the other hand, galaxies covered in blue dust have recently become known, named for their unexpected peak brightness in the blue region. It is believed that this feature is also related to supermassive black holes.
The same thing
And now, in a new study, scientists have suggested that galaxies covered in blue dust are actually the same objects as Little Red Dots, only we see them at a different time. Indeed, these galaxies inhabited the Universe during the so-called Cosmic Noon, approximately 2-3 billion years after the Big Bang.
The idea arose during research into the blue dust-covered galaxy ADFS-KMTDOG-102. After determining its full spectrum, scientists noticed that behind it, it looks very much like Little Red Dot.
Of course, it may be a coincidence, but it is quite possible that Little Red Dots are also caused by dust ejected by the black hole. Thus, the same process at different stages can indeed produce different colors for an object such as a black hole.
According to phys.org
