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Home / Science / New radio images show galaxies burning like flames in the dark

New radio images show galaxies burning like flames in the dark



The universe may be a bit like magic. When you turn to observe light of different wavelengths, you will see various objects, events and interactions that are invisible to the human eye.

Using the Very Large Array Telescope in New Mexico, astronomers led by Mary Lou Genden Masolais of the European Southern Observatory stared at a huge cluster of galaxies. In the low-frequency radio wavelengths, they saw a complex invisible halo, which may be the result of intense galactic interaction.

In addition to the visible light emitted by the Milky Way, there are many other things. Many satellites, including the Milky Way, have large-scale radio structures, huge bubbles or radio emission jets, which extend far above and below the plane of the Milky Way. In many cases, these lobes and jets are well-defined and roughly symmetrical.

Another picture emerged in the Perseus cluster located in the Milky Way, about 240 million light-years from the Milky Way.

The Perseus star cluster is huge and is one of the heaviest objects in the known universe. It contains thousands of galaxies encased in huge clouds of hot gas. The new VLA image-the first image with high resolution in the low frequency range of 230 to 470 MHz-reveals previously invisible details in large radio structures.

The NGC 1

275 galaxy (also known as Perseus A) is located in the center of the cluster and is the brightest galaxy. In its internal lobes, observations found new substructures-radio-emitting filaments, and a ring structure in the southern lobes. Observations also confirmed the presence of radio clutter in the outer lobe, which was first discovered in 2002.

At the same time, the galaxy NGC 1265 has two long jets-but they bend at a 90 degree angle, trailing in a curved comet-like tail. This structure is well-known, but puzzling. Such a tail is usually interpreted as a tracer of movement through the medium inside the cluster caused by the punching pressure. Based on the analysis of the difference in brightness of the tail, the research team interpreted this shape as evidence of two independent electron populations.

They also found new radio-emitting filaments in the tail, although it is difficult to tell what caused it at this stage. It may be turbulence or magnetic fields; higher resolution images are needed for more detailed analysis.

The galaxy IC 310 is also a tail galaxy, although its tail is straight, which is more normal, which is consistent with the radio galaxy that has launched into the galaxy. But recent studies have shown that this galaxy is a big bang. It shoots a beam of matter from the galactic nucleus toward the observer (that is, us on Earth) at near the speed of light.

Due to the angle of view, the team was able to observe the gamma rays in the center of the Milky Way galaxy, as well as the new structure in the tail jet-two very different narrow collimated jets at the bottom of the tail. According to their analysis, these observations are consistent with Mars, which shows that the curved radio galaxy and Mars are not mutually exclusive.

The Milky Way star cluster is a strange place, full of interactions and objects that we don’t understand at all. These new discoveries are the breadcrumbs of the learning process… but they also highlight the importance of using the most powerful telescope we can convene to get there.

Gendron-Marsolais said: “These images show us previously invisible structures and details, which helps us determine the nature of these objects.”

The team’s research has been accepted Monthly Bulletin of the Royal Astronomical SocietyAnd is available on arXiv.


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