X and infrared, is associated with what are called “hotspots”,”text”:”This type of flare, previously observed by X-ray and infrared telescopes, is thought to be associated with so-called “hot spots”}}”>These types of eruptions, previously observed by X-ray and infrared telescopes, are thought to be associated with so-called “hot spots”.hot gas bubbles that orbit very quickly and close to the black hole,” the scientists note in the release.
” What is really new and interesting is that such flares have so far only been clearly present in X-ray and infrared observations of Sagittarius A*. For the first time, we see a very strong indication that orbiting hotspots are also present in radio observations. »
Perhaps these hotspots detected under infrared waves are a manifestation of the same physical phenomenon: as soon as the hotspots emitting in the infrared cool, they become visible in the longer wavelengths, such as those observed by ALMA and the EHTadded his colleague Jesse Vos, from Radboud University in the Netherlands.
The idea that the flares came from magnetic interactions in very hot gas orbiting very close to Sagittarius A* was accepted by a majority of astrophysicists, but these recent observations confirm it.
Researchers now want to track hotspots across frequencies using coordinated observations in different wavelengths.
The success of such an effort would be a real milestone for our understanding of the physics of flares in the galactic center.says Ivan Marti-Vidal of the University of Valencia in Spain.
In addition, scientists hope to be able to directly observe the gas clusters around the black hole to learn more about this energy monster.
” Hopefully someday we can say we know what’s going on in Sagittarius A*. »
The details of this work are published in the journal Astronomy & Astrophysics (New window) (in English).