The center of the Milky Way is a strange and wild place.
Our galaxy’s nucleus resides there – a supermassive black hole 4 million solar masses. A beast named Sgr A* may be the most extreme environment in our galaxy. dominated by the gravitational and magnetic fields of Sgr A*.
It’s also hard to see. Although only 25,800 light-years away, the region is shrouded in dense clouds of dust and gas that obscure some wavelengths of light. But if we use technology to adjust our vision to invisible wavelengths, beyond the narrow capabilities of our eyes We’ll start to see some weird processes going on in it.
Using the powerful Chandra X-ray Observatory Space Telescope and the MeerKAT Radio Telescope, astronomers have given us such a view. They combined them into a panoramic mosaic showing threads of superheated gases and magnetic fields in detail. “Never had it before”;
and in a new report Astronomer Daniel Wang of the University of Massachusetts Amherst has described these features in detail. This includes particularly interesting topics that glow brightly in tangled X-ray and radio wavelengths.
“This topic reveals a new phenomenon,” said Wang. “This is evidence of an ongoing magnetic reconnection event.”
All pictures are interesting. X-rays are shown in orange, green, blue, and purple, representing different energies. and the radio wavelengths are gray and purple. Above and below the galactic plane, two large gases extend 700 light-years.
The Southern bubble appears to be related to the giant radio bubble newly discovered in 2019, which is thought to be the result of recent activity by Sgr A* (not to be confused with the Fermi bubble or the much larger eROSITA bubble).
An interesting gas thread named G0.17-0.41 appears in the southern lobe – a slender, elongated structure 20 light-years long but only 0.2 light-years wide.
X-rays are embedded within radio fibers. And its profile shows that the radio filament is magnetic. The shape and spectral properties of these related elements indicate that the helix is the result of magnetic reconnection. This is an extreme event that occurs when magnetic field lines aligned in opposite directions collide, split, and reconnect.
during this process which rearranges the magnetic field Magnetic energy is converted into kinetic energy and heat. Although this process is usually not powerful enough to produce X-rays. But the magnetic field in the center of the galaxy is much more powerful.
The location of the filaments at the edges of the bubbles suggests that magnetic reconnection may have occurred through collisions between gas clouds. When material is ejected from an explosion at the center of the galaxy. It will collide with gas in the interstellar medium. This will cause a new connection.
This could be partly responsible for heating the gases in the region. and pointed out some interesting implications. Since most reconnection events are either too faint or too diffuse in X-rays to be detected by our current methods, it is likely that G0.17-0.41 will display “only the tip of the reconnection iceberg in the x-ray.” the center of the galaxy,” Wang wrote in his paper.
This is because reconnection events may play a role in heating the interstellar plasma. The acceleration of cosmic rays interstellar turbulence and the formation of interstellar structures He believes that filaments such as G0.17-0.41 could be an excellent laboratory for understanding the physics of interstellar magnetic reconnection.
“The center of the galaxy is a truly complex system. Not only the interactions between the elements of stars and stars, plus Sgr A*, but also inflows and outflows. multiple power sources as well as heating and cooling mechanisms,” he said.
“A comprehensive study of this complex galactic center would require a truly multimodal approach. Together with dedicated theoretical and computational simulations, ultimately, what we learn from the GC ecosystem and its connection to large-scale structures will give us insights. functioning of similar extreme regions in other galaxies.”
The research was published in Monthly announcement of the Royal Astronomical Society.